Download Print this page

Fluke 5700A Series Service Manual

Fluke 5700A Series Service Manual

Multi-function calibrator

Hide thumbs Also See for 5700A Series:

Operator's manual (336 pages)

,

Service manual (186 pages)

,

Getting started (42 pages)

Table Of Contents

Table of Contents

Advertisement

Quick Links

Download this manual See also: Operator's Manual

®

5700A/5720A Series II

Multi-Function Calibrator

Service Manual

PN 601630

June 1996 Rev. 2, 3/05

©1996, 2002, 2005 Fluke Corporation, All rights reserved. Printed in U.S.A.

All product names are trademarks of their respective companies.

Table of Contents

Advertisement

Table of Contents

Troubleshooting

Need help?

Need help?

Do you have a question about the 5700A Series and is the answer not in the manual?

Questions and answers

Summary of Contents for Fluke 5700A Series

Page 1 ® 5700A/5720A Series II Multi-Function Calibrator Service Manual PN 601630 June 1996 Rev. 2, 3/05 ©1996, 2002, 2005 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies.
Page 2 Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair, or replacement of a defective product which is returned to a Fluke authorized service center within the warranty period.
Page 3: Table Of Contents
Table of Contents Chapter Title Page Introduction and Specifications............1-1 1-1. Introduction................... 1-3 1-2. Contacting Fluke................... 1-4 1-3. About this Manual ................1-4 1-4. How to Use this Manual ............... 1-4 1-5. Additional Instruction Manuals ............1-5 1-6. Wideband AC Voltage Module (Option 5700A-03) ......1-5 1-7.
Page 4 Introduction................... 2-5 2-2. Calibrator Overview ................2-5 2-3. Internal References................2-5 2-4. Hybrid Reference Amplifiers ............2-5 2-5. Fluke Thermal Sensor (FTS)............2-5 2-6. Digital-to-Analog Converter (DAC)..........2-6 2-7. Digital Section Overview..............2-6 2-8. Analog Section Overview..............2-6 2-9.
Page 5 (continued) Contents 2-48. Refresh Failure Detect Circuitry ..........2-28 2-49. Decoding and Timing Circuitry ........... 2-28 2-50. Control Display Circuitry............. 2-29 2-51. Output Display Circuitry.............. 2-30 2-52. Keyboard Scanner Circuitry............2-31 2-53. Knob Encoder Circuitry ............... 2-31 2-54. Led Circuitry ................2-32 2-55.
Page 6 5700A/5720A Series II Service Manual 2-111. DAC Buffered Reference Sip............2-68 2-112. Calibration Hardware ..............2-69 2-113. ADC Amplifier................2-69 2-114. ADC Input Selection ..............2-69 2-115. ADC Circuit ................. 2-70 2-116. How the DAC is Used in Calibration........... 2-72 2-117.
Page 7 (continued) Contents 2-167. High Voltage Magnitude Control..........2-106 2-168. Ohms Overview................2-108 2-169. Ohms Main Assembly (A10)............2-109 2-170. Selection of Resistance Values ............ 2-109 2-171. Ohms Main Assembly Support of Current Function Calibration. 2-112 2-172. Ohms Digital Control..............2-112 2-173.
Page 8 5700A/5720A Series II Service Manual 3-25. Rationale for Using Metal-Film Resistors to Measure AC Current . 3-37 3-26. Wideband Frequency Accuracy Test..........3-38 3-27. Wideband AC Voltage Module Output Verification......3-38 3-28. Wideband Output Accuracy at 1 kHz Test ........... 3-39 3-29.
Page 9 (continued) Contents 5-11. Two-wire Compensation Circuit..........5-55 5-12. Troubleshooting the Ohms Main Assembly (A10) ......5-56 5-13. Troubleshooting the DAC Assembly (A11)........5-57 5-14. Duty-cycle Control Circuit............5-61 5-15. ADC Circuit ................. 5-65 5-16. Buffered Reference SIP Assembly (A11A2): ......5-66 5-17.
Page 10 5700A/5720A Series II Service Manual viii...
Page 11 List of Tables Table Title Page 1-1. Auxiliary Amplifier Data ..................1-6 2-1. Analog Motherboard Connectors ................2-17 2-2. Supplies Generated by the Digital Power Supply ..........2-19 2-3. CPU Acronym Glossary..................2-23 2-4. CPU Memory Map ....................2-24 2-5. CPU Interrupts, Priorities, and Vectors..............
Page 12 5700A/5720A Series II Service Manual 3-15. Minimum Use Requirements.................. 3-47 3-16. 5720A Resistance Test Record ................3-50 3-17. 5700A Resistance Test Record ................3-52 3-18. DC Voltage Test Record for 5720A............... 3-54 3-19. DC Voltage Test Record for 5700A............... 3-55 3-20.
Page 13 (continued) Contents 6-26. A20 CPU PCA ....................... 6-83 6-27. A21 Rear Panel PCA....................6-85...
Page 14 5700A/5720A Series II Service Manual...
Page 15 List of Figures Figure Title Page 1-1. Time and Costs: Calibrator Calibration..............1-9 2-1. Digital Section Block Diagram ................2-7 2-2. Analog Section Block Diagram, Part ..............2-9 2-3. Analog Section Block Diagram, Part ..............2-10 2-4. System Interconnections ..................2-15 2-5.
Page 16 5700A/5720A Series II Service Manual 2-33. Calibration to an External 10 kΩ Standard ............2-116 2-34. Ratio Calibration, 10Ω From 100Ω ............... 2-120 2-35. Current Output Simplified Schematic ..............2-123 2-36. Current Assembly Calibration................2-128 2-37. Wideband Output Assembly Simplified Schematic ..........2-139 3-1.
Page 17 (continued) Contents 5-22. Waveform at Pin 10 of U6 ..................5-62 5-23. Waveform at Pin 6 of U13 ..................5-63 5-24. Waveform at Pin 4 of U10 ..................5-63 5-25. Waveform at TP6 ....................5-64 5-26. Waveform at Pin 7 of U12 ..................5-65 5-27.
Page 18 5700A/5720A Series II Service Manual...
Page 19 20402. Stock No. 004-000-00345-4. Declaration of the Manufacturer or Importer We hereby certify that the Fluke Model 5700A/5720A Series II Calibrator is in compliance with BMPT Vfg 243/1991 and is RFI suppressed. The normal operation of some equipment (e.g. signal generators) may be subject to specific restrictions. Please observe the notices in the users manual.
Page 21 (continued) Index OPERATOR SAFETY SUMMARY WARNING HIGH VOLTAGE is used in the operation of this equipment LETHAL VOLTAGE may be present on the terminals, observe all safety precautions! To avoid electrical shock hazard, the operator should not electrically contact the output hi or sense hi binding posts. During operation, lethal voltages of up to 1100V ac or dc may be present on these terminals.
Page 22: Power Source
Symbols Marked on Equipment DANGER — High Voltage Protective ground (earth) terminal Attention — refer to the manual. This symbol indicates that information about the usage of a feature is contained in the manua Power Source The 5700A/5720A Series II is intended to operate from a power source that will not apply more than 264V ac rms between the supply conductors or between either supply conductor and ground.
Page 23 (continued) Index SERVICING SAFETY SUMMARY FOR QUALIFIED SERVICE PERSONNEL ONLY Also refer to the preceding Operator Safety Summary Do Not Service Alone Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and resuscitation is present. Use Care When Servicing With Power On Dangerous voltage exist at many points inside this product.
Page 24 FIRST AID FOR ELECTRIC SHOCK Free the Victim From the Live Conductor Shut off high voltage at once and ground the circuit. If high voltage cannot be turned off quickly, ground the circuit. If the circuit cannot be broken or grounded, use a board, dry clothing, or other nonconductor to free the victim.
Page 25: Introduction And Specifications
Chapter 1 Introduction and Specifications Title Page 1-1. Introduction................... 1-3 1-2. Contacting Fluke................... 1-4 1-3. About this Manual ................1-4 1-4. How to Use this Manual ............... 1-4 1-5. Additional Instruction Manuals ............1-5 1-6. Wideband AC Voltage Module (Option 5700A-03) ......1-5 1-7.
Page 26 5700A/5720A Series II Calibrator Service Manual 1-30. DC Voltage Specifications ............... 1-15 1-31. AC Voltage Specifications ............... 1-18 1-32. Resistance Specifications ..............1-29 1-33. DC Current Specifications..............1-33 1-34. AC Current Specifications..............1-36 1-35. Wideband AC Voltage (Option 5700-03) Specifications....1-41 1-36.
Page 27: Introduction
The 5720A Series II operates in a similar manner to the 5700A Series II, the difference is that the 5720A Series II has a considerably higher specified accuracy. Option 5700A-03 Wideband AC Voltage, which is available for both the 5700A Series II and the 5720A Series II, extends this workload to include rf voltmeters.
Page 28: Contacting Fluke
1-2. Contacting Fluke To order accessories, receive operating assistance, or get the location of the nearest Fluke distributor or Service Center, call: USA: 1-888-44-FLUKE (1-888-443-5853)
Page 29: Additional Instruction Manuals
Fluke Service Department under PN 105798) Order additional copies of these instruction manuals separately using the part numbers provided. For ordering instructions, refer to the Fluke Catalog or contact a Fluke sales representative. 1-6. Wideband AC Voltage Module (Option 5700A-03) The Wideband AC Voltage Module (Option 5700A-03) can be installed in both the 5700A and 5720A Series II Calibrators.
Page 30: Auxiliary Amplifiers
5700A/5720A Series II Calibrator Service Manual 1-7. Auxiliary Amplifiers The Fluke Model 5725A Amplifier is available to extend the high voltage performance and current range of the calibrator: Interface connectors on the calibrator’s rear panel accept cables to directly operate a 5725A.
Page 31: Direct Voltage Reference Standard
It maintains full specified stability over a temperature span of 18 to 28 °C. The calibrator uses a 10V reference standard such as the Fluke 732B in its semi- automated calibration procedure to establish external voltage traceability. Chapter 7 describes this procedure.
Page 32: Service Centers
In the calibrator, one Fluke rms sensor serves as an ac/dc transfer standard to develop gain and flatness correction constants during calibration. The second Fluke rms sensor continuously monitors and corrects output voltage during operation.
Page 33: Time And Costs: Calibrator Calibration
Also, you must assume that drift is predictable enough so that performance is within limits between recalls. The 5700A/5720A Series II Calibrator makes use of Fluke design breakthroughs in the use of internal check standards and measurement systems. As a result, it can be completely calibrated in place to full specifications using a small number of convenient, portable, environmentally tolerant standards available from Fluke.
Page 34: The Calibration Process
Infrequent verification is done in the traditional way, by comparing selected ac voltage outputs with an external dc voltage standard through an external ac/dc transfer standard. Fluke recommends this be done every two years, or as determined by the policy of your organization.
Page 35: Developing A Performance History
1-21. Developing a Performance History A Fluke specification is a set of performance limits that all products must meet. To maintain consistent quality, Fluke calibrators are specified with enough margin to include temperature, line, and load extremes, plus additional margin for production. This means that a typical 5700A/5720A Series II calibrator in a typical environment operates inside 50% of specification limits.
Page 36: Specification Confidence Levels
5700A/5720A Series II Calibrator Service Manual Specifications are valid after a warm-up period of twice the time the calibrator has been turned off, up to a maximum of 30 minutes. For example, if the calibrator has been turned off for five minutes, the warm-up period is ten minutes. 1-25.
Page 37: General Specifications
Introduction and Specifications General Specifications 1-28. General Specifications Warm-Up Time............Twice the time since last warmed up, to a maximum of 30 minutes. System Installation ..........Rear output configuration and rack- mount kit available. Standard Interfaces ..........IEEE-488, RS-232, 5725A, 5205A or 5215A, 5220A, phase lock in (BNC), phase reference out (BNC).
Page 38 5700A/5720A Series II Calibrator Service Manual 43.2 cm (17 in) 17.8 cm (7 in) 6.35 cm (2.5 in) 63 cm (24.8 in) FOR CABLE ACCESS 1-14...
Page 39: Dc Voltage Specifications
Introduction and Specifications Electrical Specifications 1-29. Electrical Specifications Note Fluke guarantees performance verification using specifications stated to 99% confidence level. 1-30. DC Voltage Specifications 5720A Series II DC Voltage Specifications Relative Uncertainty Absolute Uncertainty ± 1 °C ± 5 °C from calibration temperature...
Page 40 5700A/5720A Series II Calibrator Service Manual 5700A Series II DC Voltage Specifications Absolute Uncertainty Relative Uncertainty ± 5 °C from calibration temperature ± 1 °C Range Resolution 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days ± (ppm output + µV)
Page 41 Introduction and Specifications Electrical Specifications DC Voltage Secondary Performance Specifications and Operating Characteristics Temperature Coefficient Noise Adder Stability Linearity ± 1 °C 0 - 10 °C Bandwidth Bandwidth ± 1 °C Range 24 Hours 0.1-10 Hz 10 Hz-10 kHz 10 - 40 °C 40 - 50 °C pk-pk ±...
Page 42: Ac Voltage Specifications
5700A/5720A Series II Calibrator Service Manual 1-31. AC Voltage Specifications 5720A Series II AC Voltage Specifications: 99% Confidence Level Absolute Uncertainty Relative Uncertainty ± 5 °C from calibration temperature ± 1 °C Frequency Range Resolution 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days...
Page 43 Introduction and Specifications Electrical Specifications 50 - 1 k 70 + 4 75 + 4 80 + 4 85 + 4 50 + 4 55 + 4 5725A Amplifier: 1100 V 1 mV 40 - 1 k 75 + 4 80 + 4 85 + 4 90 + 4...
Page 44 5700A/5720A Series II Calibrator Service Manual 5720A Series II AC Voltage Specifications: 95 % Confidence Level Absolute Uncertainty Relative Uncertainty ± 5 °C from calibration temperature ± 1 °C Frequency Range Resolution (Hz) 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days ±...
Page 45 Introduction and Specifications Electrical Specifications 5725A Amplifier: 1100 V 1 mV 40 - 1 k 75 + 4 80 + 4 85 + 4 90 + 4 50 + 4 55 + 4 1 k - 20 k 105 + 6 125 + 6 135 + 6 165 + 6...
Page 46 5700A/5720A Series II Calibrator Service Manual 5700A Series II AC Voltage Specifications: 99 % Confidence Level Absolute Uncertainty Relative Uncertainty ± 5 °C from calibration temperature ± 1 °C Frequency Range Resolution 24 Hours 90 Days 180 Days 1 Year...
Page 47 Introduction and Specifications Electrical Specifications 5725A Amplifier: 1100 V 1 mV 40 - 1 k 75 + 4 80 + 4 85 + 4 90 + 4 50 + 4 55 + 4 1 k - 20 k 105 + 6 125 + 6 135 + 6 165 + 6...
Page 48 5700A/5720A Series II Calibrator Service Manual 5700A Series II AC Voltage Specifications: 95 % Confidence Level Absolute Uncertainty Relative Uncertainty ± 5 °C from calibration temperature ± 1 °C Frequency Range Resolution 24 Hours 90 Days 180 Days 1 Year...
Page 49 Introduction and Specifications Electrical Specifications 5725A Amplifier: 1100 V 1 mV 40 - 1 k 75 + 4 80 + 4 85 + 4 90 + 4 50 + 4 55 + 4 1 k - 20 k 105 + 6 125 + 6 135 + 6 165 + 6...
Page 50 5700A/5720A Series II Calibrator Service Manual AC Voltage Secondary Performance Specifications and Operating Characteristics Temperature Coefficient Maximum Stability Distortion 0 - 10 °C ± 1 °C Output Impedance Frequency Bandwidth Range 10 - 40 °C 24 Hours (Ω) (Hz) 10 Hz-10 MHz 40 - 50 °C ±...
Page 51 Introduction and Specifications Electrical Specifications 5725A Amplifier: Temperature Coefficient Distortion Stability Adder Bandwidth ±1 °C Load Regulation Range Frequency 10 Hz -10 MHz 0 - 10 °C and (Hz) 10 - 40 °C 24 Hours 40 - 50 °C ±(% output) ±(ppm output + mV) ±(ppm output) / °C ±(ppm output + mV)
Page 52 5700A/5720A Series II Calibrator Service Manual Overshoot .............. <10 % Common Mode Rejection ........140 dB, DC to 400 Hz Frequency Ranges (Hz)............10.000 - 119.99 0.1200 k - 1.1999 k 1.200 k - 11.999 k 12.00 k - 119.99 k 120.0 k - 1.1999 M Uncertainty............
Page 53: Resistance Specifications
Introduction and Specifications Electrical Specifications 1-32. Resistance Specifications 5720A Series II Resistance Specifications Absolute Uncertainty of Characterized Value Relative Uncertainty ±5 °C from calibration temperature ±1 °C Nominal Value (Ω) 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days ±ppm 99 % Confidence Level...
Page 54 5700A/5720A Series II Calibrator Service Manual 5700A Series II Resistance Specifications Absolute Uncertainty of Characterized Value Relative Uncertainty ±5 °C from calibration temperature ±1 °C Nominal Value 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days (Ω) ±ppm...
Page 55 Introduction and Specifications Electrical Specifications Resistance Secondary Performance Specifications and Operating Characteristics Maximum Two-Wire Adder Temperature Coefficient Difference Active Maximum Adder Stability Compensation Full Spec Load Peak Nominal Characterized ±1 °C Range Current Value to Nominal 0 - 10 °C 24 Hours Lead Resistance (Ω)
Page 56 5700A/5720A Series II Calibrator Service Manual Current Derating Factors Value of Derating Factor K for Over or Under Current Nominal Value Two-Wire Comp Four-Wire Four-Wire (Ω) I < I I < I < I < I  SHORT 4 x10 1.5 x 10 1.6 x 10 3 x 10...
Page 57: Dc Current Specifications
Introduction and Specifications Electrical Specifications 1-33. DC Current Specifications 5720A Series II DC Current Specifications Absolute Uncertainty Relative Uncertainty ±1 °C ±5 °C from calibration temperature Resolution Range 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days ±...
Page 58 5700A/5720A Series II Calibrator Service Manual 5700A Series II DC Current Specifications Absolute Uncertainty Relative Uncertainty ±1 °C ±5 °C from calibration temperature Resolution Range 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days ± (ppm output + nA) 99 % Confidence Level 220 µA...
Page 59 Introduction and Specifications Electrical Specifications DC Current Secondary Performance Specifications and Operating Characteristics Temperature Noise Coefficient Stability Bandwidth Bandwidth Burden Maximum ±1 °C 0 - 10 °C 0.1-10 Hz Voltage Load for Full 10 Hz-10 Compliance 24 Hours Range 10 - 40 °C Adder Accuracy Limits...
Page 60: Ac Current Specifications
5700A/5720A Series II Calibrator Service Manual 1-34. AC Current Specifications 5720A Series II AC Current Specifications: 99 % Confidence Level Absolute Uncertainty Relative Uncertainty ±5 °C from calibration temperature ±1 °C Frequency Range Resolution 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days...
Page 61 Introduction and Specifications Electrical Specifications 5720A Series II AC Current Specifications: 95% Confidence Level Absolute Uncertainty Relative Uncertainty ±5 °C from calibration temperature ±1 °C Frequency Range Resolution 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days (Hz) ±...
Page 62 5700A/5720A Series II Calibrator Service Manual 5700A Series II AC Current Specifications: 99 % Confidence Level Absolute Uncertainty Relative Uncertainty ±5 °C from calibration temperature ±1 °C Frequency( Range Resolution 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days ±...
Page 63 Introduction and Specifications Electrical Specifications 5700A Series II AC Current Specifications: 95 % Confidence Level Absolute Uncertainty Relative Uncertainty ±5 °C from calibration temperature ±1 °C Frequency Range Resolution 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days (Hz) ±...
Page 64 5700A/5720A Series II Calibrator Service Manual AC Current Secondary Performance Specifications and Operating Characteristics Temperature Maximum Noise and Resistive Distortion Coefficient Stability ±1 °C Compliance Load (Bandwidth Frequency 24 Hours Limits Range 0 - 10 °C and For Full 10 Hz - 50 kHz (Hz) 10 - 40 °C (V rms)
Page 65: Wideband Ac Voltage (Option 5700-03) Specifications
Introduction and Specifications Electrical Specifications 1-35. Wideband AC Voltage (Option 5700-03) Specifications Specifications apply to the end of the cable and 50 Ω termination used for calibration. Absolute Uncertainty ±5 °C from calibration temperature Range 30 Hz - 500 kHz Resolution 24 Hours 90 Days...
Page 66: Auxiliary Amplifier Specifications
5700A/5720A Series II Calibrator Service Manual 1-36. Auxiliary Amplifier Specifications For complete specifications, see the 5205A and 5220A Operators Manuals. 5205A (220V - 1100 V ac, 0 V - 1100 V dc) Overshoot: < 10 % Distortion (bandwidth 10 Hz - 1 MHz): 10 Hz - 20 kHz ..........
Page 67: Theory Of Operation
Introduction................... 2-5 2-2. Calibrator Overview ................2-5 2-3. Internal References................2-5 2-4. Hybrid Reference Amplifiers ............2-5 2-5. Fluke Thermal Sensor (FTS)............2-5 2-6. Digital-to-Analog Converter (DAC)..........2-6 2-7. Digital Section Overview..............2-6 2-8. Analog Section Overview..............2-6 2-9.
Page 68 5700A/5720A Series II Calibrator Service Manual 2-36. Glue Logic..................2-25 2-37. RAM (Random-Access Memory) ..........2-25 2-38. ROM (Read-Only Memory)............2-25 2-39. Electrically-Erasable Programmable Read-Only Memory (EEPROM)................... 2-26 2-40. DUART (Dual Universal Asynchronous Receiver/transmitter) Circuit................... 2-26 2-41. Clock/Calendar Circuit..............2-26 2-42.
Page 69 Theory of Operation Introduction 2-98. Internal CAL Zero Amplifier ............2-59 2-99. Switch Matrix 5725A Amplifier Interface ........2-61 2-100. DAC Assembly (A11) ..............2-61 2-101. Basic DAC Theory of Operation..........2-61 2-102. DAC Assembly Digital Control ........... 2-64 2-103. DAC Assembly Reference Circuitry..........
Page 70 5700A/5720A Series II Calibrator Service Manual 2-155. High Voltage Assemblies (A14 and A15)........2-96 2-156. 1100V AC Range ................. 2-96 2-157. 1100V DC Range ................. 2-98 2-158. HVDC Power Supply Filter Circuit ..........2-98 2-159. HV DC Output Series Pass and Current Limit Circuit....2-98 2-160.
Page 71: Introduction
"Internal References.") 2-3. Internal References The major references that form the basis of the Calibrator's accuracy are the hybrid reference amplifiers, patented Fluke solid-state thermal rms sensors, an extremely linear dac, and two internal precision resistors. 2-4. Hybrid Reference Amplifiers A precision source can only be as accurate as its internal references, so the dc voltage reference for the Calibrator was chosen with extreme care.
Page 72: Digital-To-Analog Converter (Dac)
5700A/5720A Series II Calibrator Service Manual After initial functional verification of the Fluke Thermal Sensors, their characteristics only change by less than 1/10th of the allowed ac/dc error per year. External calibration of the ac voltage function of the Calibrator consists of verifying that the Calibrator meets its specifications.
Page 73: Digital Section Block Diagram
Theory of Operation Analog Section Overview ahp003f.eps Figure 2-1. Digital Section Block Diagram...
Page 74: Functional Description Presented By Output Function
5700A/5720A Series II Calibrator Service Manual These analog assemblies are interfaced to the Analog Motherboard assembly (A3). The guarded digital bus generated by the guard crossing portion of the Regulator/Guard Crossing assembly controls all analog assemblies except the Filter/PA Supply. The Guard Crossing interfaces with the unguarded CPU assembly via a fiber-optic link.
Page 75: Analog Section Block Diagram, Part
Theory of Operation Theory of Operation ahp33f.eps Figure 2-2. Analog Section Block Diagram, Part 1...
Page 76 5700/5720A Series II Calibrator Service Manual ahp34f.eps Figure 2-3. Analog Section Block Diagram, Part 2 2-10...
Page 77: Ac Voltage Functional Description
Theory of Operation Functional Description Presented by Output Function The 1100V range is generated by the High Voltage/High Current assembly (A15) operating in conjunction with the Power Amplifier assembly and the High Voltage Control assembly. The 11V range of the DAC assembly is routed to the High Voltage/High Current assembly which amplifies by a gain of -100 to create the 1100V range.
Page 78: Wideband Ac V Functional Description (Option -03)
5700A/5720A Series II Calibrator Service Manual 2-12. Wideband AC V Functional Description (Option -03) The Wideband AC Voltage module (Option -03) consists of the Wideband Oscillator assembly (A6) and the Wideband Output assembly (A5). There are two wideband frequency ranges: •...
Page 79: Ohms Functional Description
Theory of Operation System Interconnect Detailed Circuit Description 2-15. Ohms Functional Description Two assemblies function as one to supply the fixed values of resistance: • Ohms Main assembly (A10) • Ohms Cal assembly (A9) All of the resistance values except the 1Ω, 1.9Ω, and short are physically located on the Ohms Main assembly.
Page 80: Transformer Assembly (A22)
5700A/5720A Series II Calibrator Service Manual 2-18. Transformer Assembly (A22) The Transformer assembly receives ac line inputs routed through the A4 Digital Motherboard. This assembly supplies outputs throughout the Calibrator, all of which are routed through the A4 Digital Motherboard. The Transformer assembly, the filter portion of the Filter/PA Supply assembly (A18), and the regulator portion of the Regulator/Guard Crossing assembly (A17) create the system power supply for all analog assemblies.
Page 81: System Interconnections
Theory of Operation Functional Description Presented by 0utput Function ahp35f.eps Figure 2-4. System Interconnections 2-15...
Page 82 5700/5720A Series II Calibrator Service Manual ahp35f.eps Figure 2-4. System Interconnections (cont) 2-16...
Page 83 Theory of Operation System Interconnect Detailed Circuit Description Table 2-1. Analog Motherboard Connectors Motherboard Connector Connected to Assembly J101 Wideband Oscillator Assembly (A6) J111 Wideband Output Assembly (A5) J201 and J202 Switch Matrix Assembly (A8) J211 and J212 Current/Hi-Res Assembly (A7) J301 and J302 Ohms Main Assembly (A10) J311 and J312...
Page 84: Front/Rear Binding Posts
5700A/5720A Series II Calibrator Service Manual except during ac or dc millivolt operation, when instead OSC LO GD is connected to S COM. 2-20. Front/Rear Binding Posts An internal cable can be configured to enable either the front panel or panel binding posts.
Page 85: Power Supply
Theory of Operation Digital Section Detailed Circuit Description Table 2-2. Supplies Generated by the Digital Power Supply Signal Name Test Point Nominal Tolerance Current Rated Output Limit Output +75V OUT +/-8% 121 mA 100 mA +35V OUT +/-7% 52 mA 40 mA +12 VOLTS +/-5%...
Page 86: Power Supply
5700A/5720A Series II Calibrator Service Manual to the output. Diode CR16 protects this circuit from reverse voltage and C4 is a bypass capacitor. Inductor L2 filters the regulated output. Resistor R13 is a bleed-off resistor for 2-28. +75V Power Supply The +75V power supply powers the grid drivers and anode drivers on the front panel control display circuitry.
Page 87: Cpu (Central Processing Unit) Assembly (A20)
Theory of Operation Digital Section Detailed Circuit Description 2-30. CPU (Central Processing Unit) Assembly (A20) The CPU (Central Processing Unit) for the Calibrator is a single-board computer based on a 68HC000 microprocessor. The CPU assembly communicates with the Guarded Digital section, the Front Panel assembly, and the Rear Panel assembly. The board can be divided into three primary areas: •...
Page 88: Cpu Assembly Block Diagram
5700A/5720A Series II Calibrator Service Manual ahp004f.eps Figure 2-5. CPU Assembly Block Diagram 2-22...
Page 89 Theory of Operation Digital Section Detailed Circuit Description Table 2-3. CPU Acronym Glossary Signal Name Function A01-A23 Address lines ADCLKCS* Clock/calendar (U33) chip select Address strobe BERR* Bus error BGACK* Bus grant acknowledge Bus request BRPDRTINT* Rear panel DUART interrupt BRPDTK* Rear panel data transfer acknowledge BRPIEEEINT*...
Page 90: Watchdog Timer
5700A/5720A Series II Calibrator Service Manual 2-33. Watchdog Timer The watchdog timer circuitry uses a 74HC4020 binary counter (U11) to divide the 450 Hz from the clock generation circuit to produce interrupt DOGINTH, signifying that the system may be locked up. This interrupt is generated 1.14 seconds after the last DOGCLR2 signal from interrupt controller U10.
Page 91: Interrupt Controller
Theory of Operation Digital Section Detailed Circuit Description 2-35. Interrupt Controller PLD U10 is the priority interrupt controller. The interrupt controller reads incoming interrupts and interrupt control lines, then encodes the highest priority interrupt into the interrupt level for the 68HC000. When the 68HC000 responds to an interrupt request, it asks the interrupt controller for an 8-bit vector that corresponds to the pending interrupt of highest priority.
Page 92: Electrically-Erasable Programmable Read-Only Memory (Eeprom)
5700A/5720A Series II Calibrator Service Manual 2-39. Electrically-Erasable Programmable Read-Only Memory (EEPROM) IC U13 is an EEPROM. The socket accommodates a 32K x 8 device (32 KB of storage.) A jumper is provided to allow an 8K x 8 (8 KB) device to be used in place of the 32 KB device.
Page 93: Clock Filter Circuit
Theory of Operation Digital Section Detailed Circuit Description 2-42. Clock Filter Circuit The clock filter circuit generates a 3.6864 MHz 200 mV sine wave for the Rear Panel and Front Panel assemblies. This circuit buffers the 3.6864 MHz Clock with an inverter in U3.
Page 94: Front Panel Assembly (A2)
5700A/5720A Series II Calibrator Service Manual 2-46. Front Panel Assembly (A2) The Front Panel assembly, operating in conjunction with the Keyboard assembly (linked by a cable), is the operator interface to the Calibrator. This assembly contains two separate vacuum-fluorescent displays: the Control Display and the Output Display. Each display has its own control, high voltage drive, and filament-switching circuits.
Page 95: Control Display Circuitry
Theory of Operation Digital Section Detailed Circuit Description Table 2-6. Front Panel Memory Map Name Read/Write Address OTDCS* D02000 to D027FF DMDCS* D02800 to D02FFF ENCODERCS* D03000 to D033FF ENCODERRESET* D03000 to D033FF LED_OUTPUT_CNTRL D03400 to D037FF LED_LATCH_EN D03400 to D037FF KEYBOARDCS* D03800 to D03BFF 2-50.
Page 96: Output Display Circuitry
5700A/5720A Series II Calibrator Service Manual transistors. When AOUT is high, U13B turns Q2 and Q4 on. Q4 turns Q6 on, providing a path for the filament current through Q2 and Q6. Zener diode VR2 provides the dc voltage offset necessary for proper filament operation. Then when BOUT is high, U13A turns Q1 and Q3 on.
Page 97: Keyboard Scanner Circuitry
Theory of Operation Digital Section Detailed Circuit Description Output display filament driver circuitry consists of transistors Q7-Q12 and zener diodes VR3 and VR4, plus associated resistors. The transistors are driven by 7406 open- collector drivers U13C and U13D. These drivers are controlled by AOUT and BOUT as in the Control Display.
Page 98: Led Circuitry
5700A/5720A Series II Calibrator Service Manual interrupt by reading U24. On a read, indicated by a logic low on ENCODERCS*, U24 places the contents of a seven-bit up/down counter on the data bus. The counter keeps track of the number of 180º rotations that have occurred between the time the interrupt was first initiated and the counter is read.
Page 99: Analog Section Detailed Circuit Description
Theory of Operation Analog Section Detailed Circuit Description 2-56. Analog Section Detailed Circuit Description Detailed descriptions of each assembly in the analog section are provided here. Simplified schematics are provided to supplement the text. 2-57. Filter/PA Supply (A18), Low-voltage Filter/Regulator Section The Filter assembly receives various ac inputs from the main power transformer and provides unregulated dc to the Regulator/Guard Crossing assembly (A17), and regulated dc supplies +5FR1, -18FR1, and -5FR2 to the DAC assembly.
Page 100: Unregulated Osc Supplies
5700A/5720A Series II Calibrator Service Manual 2-58. Unregulated OSC Supplies Line OSC COM is the return path for the +15 OSCR and -15 OSCR supplies. These supplies use a full-wave center-tapped configuration. They consist of bridge rectifier CR3 and two filter capacitors, C4 and C6, for +15 OSCR and -15 OSCR, respectively. Inputs are fused with 1.6A slow-blow fuses F1 and F2.
Page 101: Fr2 Supplies
Theory of Operation Analog Section Detailed Circuit Description 2-64. FR2 Supplies FR2 COM is the return path for unregulated +30 FR2R supply and regulated -5 FR2 supply. Each supply uses a full-wave, bridge configuration. The unregulated +30 FR2R supply consists of bridge rectifier CR7 and filter capacitor C9. Its input is fused with 0.5A slow-blow fuse F4.
Page 102: Power Amplifier Output Supply Simplified Schematic
5700A/5720A Series II Calibrator Service Manual ahp005f.eps Figure 2-6. Power Amplifier Output Supply Simplified Schematic 2-36...
Page 103: And ±500V Supplies
Theory of Operation Analog Section Detailed Circuit Description 2-67. ±250V and ±500V Supplies Input signals PA CT, PA HAC1, PA HAC2, PA LAC1, and PA LAC2 come from the main transformer. • PA CT is the center tap. • PA HAC1 and PA HAC2 are high voltage taps with approximately 400V rms and are fused by F201 and F204 respectively.
Page 104: Regulator/Guard Crossing Assembly (A17)
5700A/5720A Series II Calibrator Service Manual Output current on the +PA side is sensed between the emitter and base of Q203 by R202 and/or R201. Supply +PA shuts off to near 0V when enough current is flowing through +PA to forward-bias Q203. Then, current though Q203 charges capacitor C209 through R214 to a voltage above the threshold voltage at the inverting input of comparator U201C.
Page 105: Regulated Lh Supplies
Theory of Operation Analog Section Detailed Circuit Description Table 2-10. Regulated Outputs from the Regulator/Guard Crossing Assembly Nominal Signal Name Tolerance Current Rated Test Point Output Limit Output +15 OSC +15V +/-800 mV 200 mA -15 OSC -15V +/-800 mV 200 mA +5RLH +5.975V...
Page 106: Fr1 Supply
5700A/5720A Series II Calibrator Service Manual In an output short condition, the value of the PTC increases, limiting current through the device to less than 17 mA at 25ºC. The -44S supply uses the unregulated -44SR supply from the Filter assembly. This supply uses three-terminal TO-39 regulator U13, Q1, VR1, VR2, VR6, R17, R18, R19, PTC Resistor R61, CR22, CR23, CR32, CR33, C22, C25, C26, and C66.
Page 107: Guarded Digital Control Circuitry
Theory of Operation Analog Section Detailed Circuit Description U5 with heat sink, bypass capacitors C10 and C28, and protection diodes CR9, CR10, and CR12. Resistors R4 and R8 set the output voltage in the same manner as the +44S supply. Capacitor C12 improves ripple rejection. Diodes CR9 and CR10 protect U5 against input shorts, while CR12 protects against reverse voltage.
Page 108 5700A/5720A Series II Calibrator Service Manual 2-80. Inguard Clock Circuit This circuit uses 8 MHz crystal Y52 and step-down transformer T51 to generate a low- level (200 mV p-p) 8 MHz clock used by other guarded assemblies throughout the calibrator. Transformer (T51) has a center-tapped secondary, and provides CLK COM, CLK and CLK*.
Page 109: Switch Matrix Assembly (A8)
Theory of Operation Analog Section Detailed Circuit Description 2-85. Interface to Guarded Digital Bus The interface to the guarded digital bus consists of a 74HCT245 (U55), a 74HCT244 (U52), two 74HC137s (U53 and U54), inverters U51B and U51D, resistor packs Z52, Z53, and Z54, and the POP line from U58.
Page 110: Switch Matrix Digital Control
5700A/5720A Series II Calibrator Service Manual The Switch Matrix assembly consists of 33 latching type, two- and four-pole relays. The relays are driven by special driver chips, which are controlled by the assembly's 24- output 82C55 chip. The Switch Matrix also contains the 5700A-4HR1 Temperature- Controlled Precision DC Amplifier Hybrid and RNET assembly, which is used when the calibrator is in the dc 2.2V or 220 mV range.
Page 111: Switch Matrix Assembly Simplified Schematic
Theory of Operation System Interconnection Detailed Circuit Description ahp37f.eps Figure 2-7. Switch Matrix Assembly Simplified Schematic 2-45...
Page 112: Switch Matrix Operation: 11V Dc And 22V Dc Ranges
5700A/5720A Series II Calibrator Service Manual A UCN5801 driver (U13) drives non-latching relays on the motherboard. The motherboard non-latching relay supply circuit, as outlined in sections A6 through A8 of the schematic diagram, contains U17, Q1, Q2, CR1, CR2, CR10, and R6-R12. Port A of U1 provides data for this driver (PA0-PA7), and decoder U2 provides the strobe signal.
Page 113: Switch Matrix Configuration For 11V Dc And 22V Dc Ranges
Theory of Operation Analog Section Detailed Circuit Description ahp006f.eps Figure 2-8. Switch Matrix Configuration for 11V DC and 22V DC Ranges 2-47...
Page 114: Switch Matrix Operation: 2.2V Ac And 22V Ac Ranges
5700A/5720A Series II Calibrator Service Manual 2-90. Switch Matrix Operation 2V AC and 22V AC Ranges Refer to Figure 2-9 for the following discussion. AC 2.2V and 22V ranges are generated by the Oscillator assemblies and routed directly to the front panel binding posts through relays located on the Switch Matrix and Motherboard.
Page 115: Switch Matrix Configuration For 2.2V And 22V Ac Ranges
Theory of Operation Analog Section Detailed Circuit Description ahp007f.eps Figure 2-9. Switch Matrix Configuration for 2.2V and 22V AC Ranges 2-49...
Page 116: Switch Matrix Configuration For 220V Dc And Ac Ranges
5700A/5720A Series II Calibrator Service Manual ahp008f.eps Figure 2-10. Switch Matrix Configuration for 220V DC and AC Ranges 2-50...
Page 117: Switch Matrix Operation: 2.2V Dc Range
Theory of Operation Analog Section Detailed Circuit Description 2-92. Switch Matrix Operation 2V DC Range Refer to Figure 2-11 for the following discussion. The dc 2.2V range circuit consists of the dc 2.2V attenuator and a dc 2.2V range amplifier as outlined on sheet 3 of the Switch Matrix schematic.
Page 118: Switch Matrix Configuration For 2.2V Dc Range
5700A/5720A Series II Calibrator Service Manual ahp009f.eps Figure 2-11. Switch Matrix Configuration for 2.2V DC Range 2-52...
Page 119: Calibration Of The 2.2V Range
Theory of Operation Analog Section Detailed Circuit Description 2-93. Calibration of the 2 2V Range Refer to Figure 2-12 for the following discussion. Calibration of the 2.2V range involves determining its offset and gain constants. To calibrate the offset: 1. The gain of the internal cal zero amplifier is set to 130 by turning on Q6 via PB4. 2.
Page 120: Calibration Of The 2.2V Dc Range
5700A/5720A Series II Calibrator Service Manual ahp010f.eps Figure 2-12. Calibration of the 2.2V DC Range 2-54...
Page 121: Switch Matrix Configuration For 220 Mv Dc Range
Theory of Operation Analog Section Detailed Circuit Description ahp011f.eps Figure 2-13. Switch Matrix Configuration for 220 mV DC Range 2-55...
Page 122: Calibration Of The Mv Ranges
5700A/5720A Series II Calibrator Service Manual 2-95. Switch Matrix Operation 220 mV AC Range Refer to Figure 2-14 for the following discussion. As previously mentioned, the ac 220 mV range uses the same resistor network as the dc 220 mV range. In generating the ac 220 mV range the Oscillator assembly is set to the 2.2V range.
Page 123 Theory of Operation Analog Section Detailed Circuit Description ahp012f.eps Figure 2-14. V AC, 2.2 mV AC, and 22 mV AC Range 2-57...
Page 124 5700A/5720A Series II Calibrator Service Manual ahp013f.eps Figure 2-15. Divider Calibration 2-58...
Page 125: Internal Cal Zero Amplifier
Theory of Operation Analog Section Detailed Circuit Description Calibration of the 10:1 divider ratio is accomplished by connecting the DAC assembly output (DAC OUT HI and DAC SENSE HI) through relays K24 (A and B) and K6 to the input of the 10:1 divider. DAC LO, PA COM, and R COM are connected to the common of the 10:1 divider by relays K12, K11, and K21 respectively.
Page 126 5700A/5720A Series II Calibrator Service Manual ahp014f.eps Figure 2-16. Divider Gain Calibration 2-60...
Page 127: Switch Matrix 5725A Amplifier Interface
Theory of Operation Analog Section Detailed Circuit Description The internal cal zero amplifier is outlined in a broken line rectangle on sheet 1 of the schematic. Its functional parts are U20-U21, R38-44, R46-47, Q6-7, Q11, and Z2. When Q7 is on, the input of the zero amplifier is connected to 0V for a reference point. When Q6 is on, the gain of the zero amplifier is 130.
Page 128 5700A/5720A Series II Calibrator Service Manual first input square wave is called the first channel. It is switched between the reference voltage (13V) and 0V. The filter's second input square wave is called the second channel. It is switched between approximately 0.78 mV and 0V.
Page 129 Theory of Operation Analog Section Detailed Circuit Description ahp015f.eps Figure 2-17. DAC Assembly Simplified Schematic 2-63...
Page 130: Dac Assembly Digital Control
5700A/5720A Series II Calibrator Service Manual 2-102. DAC Assembly Digital Control The digital control circuit is located on sheet 6 of the DAC schematic. The 82C55 Programmable Peripheral Interface IC (U31) is the heart of this circuit. This IC, which is under software control via the guarded digital bus, has three ports that provide 24 static lines.
Page 131: Duty-Cycle Control Circuit
Theory of Operation Analog Section Detailed Circuit Description The reference circuit is designed such that the effects of the thin-film resistors and op amp errors are second order. Thus, accuracy is determined almost entirely by the ref amps. To further reduce the effects of ambient temperature variations, the hybrid is heated to a constant 62ºC by the heater control circuitry on sheet 1 of the DAC schematic.
Page 132: Dac Filter Circuit
5700A/5720A Series II Calibrator Service Manual The 3V source is created from the 13V reference. The 13V reference is buffered by op amp U1B, configured as a voltage follower. The output from U1B is divided down to 3V by a 100 kΩ and 30 kΩ resistor in the HR5 assembly, creating 3V. This 3V is again buffered by op amp U11, configured as a voltage follower, to create the 3V, which is switched by FETs Q30 and Q32.
Page 133: Sense Current Cancellation Circuit
Theory of Operation Analog Section Detailed Circuit Description In the 22V range, Q20 is off and Q21 is on, which switches in the 40 kΩ feedback resistors located on the HR6 assembly. Precise ratio matching of these resistors provides high accuracy in the 22V range. FET Q15 is on in the 22V range so that the output of the dc amplifier is half the output of the DAC.
Page 134: Negative Offset Circuit
5700A/5720A Series II Calibrator Service Manual 2-109. Negative Offset Circuit This circuit creates a constant offset voltage of approximately -127 mV at the filter input. Thus, for a DAC output voltage of 0V, the first channel count must be approximately 400 to offset this negative voltage.
Page 135: Calibration Hardware
Theory of Operation Analog Section Detailed Circuit Description 2-112. Calibration Hardware The main components of the calibration hardware are the adc amplifier and the adc (analog to digital converter). This adc circuitry converts dc analog voltages into 22-bit binary numbers which the software interprets. 2-113.
Page 136: Adc Circuit
2-115. ADC Circuit The adc (analog-to-digital converter) is shown on sheet 5 of the DAC schematic. Most of the adc is contained on one chip (U25) which uses the Fluke-patented recirculating remainder technique. The adc has rms noise of approximately 20 µV between readings. This is reduced by a factor of 5 by averaging the readings.
Page 137 Theory of Operation Analog Section Detailed Circuit Description ahp016f.eps Figure 2-18. ADC Circuit Measurement Functions 2-71...
Page 138: How The Dac Is Used In Calibration
5700A/5720A Series II Calibrator Service Manual During the remainder store function, U29 amplifies and stores the difference between the ADC INPUT and the adc dac output on one of the remainder storage capacitors, C89 or C90. In this function, U29 is configured by the adc as a difference amplifier with a gain of 16.
Page 139: Oscillator Section Overview
Theory of Operation Analog Section Detailed Circuit Description same as the previous checkpoint. This determines the exact first and second channel counts for a 0V output. Next, the +11V and +22V range gain constants are calibrated by nulling the DAC to the external 10V source, connected to the front panel binding posts of the calibrator.
Page 140: Oscillator Control Digital Control
5700A/5720A Series II Calibrator Service Manual All power supplies used by this assembly are generated by the Guard Crossing/Regulator assembly (A17) except the +5 OSC supply, which is generated by a three-terminal +5V regulator (U25) from the +15 OSC supply. The ±15 OSC supplies are buffered by L3, L4, C34 and C35 to create the ±15A supplies, and L1, L2, C86 and C87 to create the ±15B supplies.
Page 141: Averaging Converter
Theory of Operation Analog Section Detailed Circuit Description 2-123. Averaging Converter The averaging converter contains the buffer amplifier and rectifying amplifier circuits as outlined on sheet 1 of the schematic. The buffer amplifier is a non-inverting unity gain amplifier (U3). Input to the buffer amplifier is either a 0 or 20 dB attenuator contained in Z2 as selected by K3.
Page 142: Oscillator Control Analog Control Loop
5700A/5720A Series II Calibrator Service Manual ahp017f.eps Figure 2-19. Oscillator Control Analog Control Loop 2-76...
Page 143: Ac/Dc Thermal Transfer Circuit
Theory of Operation Analog Section Detailed Circuit Description 2-127. AC/DC Thermal Transfer Circuit Refer to Figure 2-20 for the following discussion. The ac/dc thermal transfer circuit achieves basic mid-band amplitude accuracy. This is done by first applying the reference voltage (VREF) to the thermal rms sensor (U14) and measuring the output. Next, the ac voltage is applied to the thermal rms sensor and the dc output is compared to the previous reading.
Page 144: Ac/Dc Thermal Transfer Circuit
5700A/5720A Series II Calibrator Service Manual ahp018f.eps Figure 2-20. AC/DC Thermal Transfer Circuit 2-78...
Page 145: Oscillator Calibration
Theory of Operation Analog Section Detailed Circuit Description The ac/dc thermal sensor and square-root amplifier, as outlined on the schematic, contain the thermal sensor U14, op amp U15 and transistor array U17. The dc voltage from the thermal sensor is connected to U15B configured as an integrator. Comparator U22B is used to control FETs Q18 and Q20.
Page 146: Ac/Dc Frequency Response Characterization
5700A/5720A Series II Calibrator Service Manual 2-129. AC/DC Frequency Response Characterization Characterization is accomplished by first performing an ac/dc transfer with the Oscillator Output set to a low frequency. The ac/ac thermal sensor circuit, containing the thermal sensor U16 and op amp U15D, characterizes the frequency response of the main ac/dc thermal sensor.
Page 147: Quadrature Rc Oscillator Circuit
Theory of Operation Analog Section Detailed Circuit Description ahp019f.eps Figure 2-21. Quadrature RC Oscillator Circuit 2-81...
Page 148: Oscillator Output Digital Control
5700A/5720A Series II Calibrator Service Manual 2-131. Oscillator Output Digital Control The digital control circuit consists of an 82C55 Programmable Peripheral Interface (U26), a 5801 Latching Relay Driver (U24), and three HC374 Octal D-Type Flip Flops (U12, U32, U33). The Programmable Peripheral Interface (U26) is under software control via the guarded digital bus and has three ports which generate 24 outputs.
Page 149: Oscillator Amplitude Control
Theory of Operation Analog Section Detailed Circuit Description frequency and the sum of the phase shifts around the loop is zero for all frequencies, we have satisfied one half of the requirement for oscillation. In summing the gain in dB around the loop it is apparent that unity gain occurs at only one frequency.
Page 150: And 22V Range Output Amplifier
5700A/5720A Series II Calibrator Service Manual that makes a positive to negative transition causes the phase detector to turn on either the positive (CR5, CR6) or the negative (CR7, CR8) charge pump, depending on which signal is first. The Charge Pump is turned off when the other signal makes its transition. Thus the signal with the highest frequency has its respective charge pump pulsed on and off while the other charge pump remains off.
Page 151: Output Stage
Theory of Operation Analog Section Detailed Circuit Description The mid stage is a common-emitter, Miller-compensated gain stage (Q5) that drives a common-base level shifter (Q13) on the Oscillator Output assembly. This stage is current limit protected by R12 and Q4. The dominant pole is set with the Miller capacitor C5 and the input stage transconductance.
Page 152: Power Amplifier Digital Control Sip Assembly (A16A1)
5700A/5720A Series II Calibrator Service Manual 2-140. Power Amplifier Digital Control Sip Assembly (A16A1) Digital control for the Power Amplifier assembly is contained on the SIP assembly (A16A1) mounted at the bottom of the Power Amplifier. This assembly configures the Power Amplifier assembly for its various modes of operation.
Page 153: Pa Common Circuitry
Theory of Operation Analog Section Detailed Circuit Description 2-141. PA Common Circuitry Common circuitry consists of the +PA and -PA supplies, input stage, mid stage, and the output stage. These four circuits are described under the next four headings. Power Amplifier input node, gain, and feedback are different for dc and ac operation. Power Amplifier gain is -20 in the dc function, determined by the ratio of resistor network bonded to the HR8 assembly (500 kΩ/25 kΩ).
Page 154: Pa Mid Stage
5700A/5720A Series II Calibrator Service Manual the gate of Q2 is at ground potential. At any frequency, the potential difference between the gate of Q2 and the base of Q6 results in a current through Q6 as determined by R22, and by the transconductance of Q2 and Q6.
Page 155: Pa Sense Current Cancellation Circuitry
Theory of Operation Analog Section Detailed Circuit Description 2-146. PA Sense Current Cancellation Circuitry During dc operation of the Power Amplifier, sense current in the 500 kΩ feedback resistor (on the resistor network in the HR8 assembly) can cause an output error because of the finite resistance path of the connection to the load.
Page 156: Power Amplifier Simplified Schematic
5700A/5720A Series II Calibrator Service Manual ahp020f.eps Figure 2-22. Power Amplifier Simplified Schematic 2-90...
Page 157: Pa Operation: 220V Ac Range
Theory of Operation Analog Section Detailed Circuit Description 2-149. PA Operation: 220V AC Range During ac operation, Power Amplifier gain is -10 as determined by the 4.99 kΩ input resistor R17, and 49.9 kΩ feedback resistors (R11 + R12 + R13). Control line SW3 turns Q50 on, which references the +input of the precision op amp in the input stage to OS COM.
Page 158: Dc Internal Calibration Network
5700A/5720A Series II Calibrator Service Manual is configured the same as for 220V ac operation, except that the input is the square-wave signal HVCL from the High Voltage Control assembly, rather than OSC OUT HI, through relays K13B and K10A. 2-153.
Page 159: Power Amplifier Dc Calibration Network
Theory of Operation Analog Section Detailed Circuit Description ahp021f.eps Figure 2-23. Power Amplifier DC Calibration Network 2-93...
Page 160 5700A/5720A Series II Calibrator Service Manual Power Amplifier dc gain of approximately -20 is calibrated next. The Power Amplifier is configured as in the 220V dc operation, except the input is connected to the DAC's 6.5V reference BRF6 and BSRF6 by U2C and U2D respectively. The resulting -130V at the Power Amplifier output is connected to the 175 kΩ...
Page 161: Power Amplifier Calibration Ac Attenuator
Theory of Operation Analog Section Detailed Circuit Description f2-24.eps Figure 2-24. Power Amplifier Calibration AC Attenuator 2-95...
Page 162: High Voltage Assemblies (A14 And A15)
5700A/5720A Series II Calibrator Service Manual 2-155. High Voltage Assemblies (A14 and A15) The High Voltage/High Current assembly (A15) and the High Voltage Control assembly (A14) are used in with conjunction with other assemblies in the calibrator to generate the ±1100V dc, 1100V ac, and the 2.2A ranges.
Page 163: High Voltage/High Current Assembly 1100V Ac Range
Theory of Operation Analog Section Detailed Circuit Description ahp022f.eps Figure 2-25. High Voltage/High Current Assembly 1100V AC Range 2-97...
Page 164: 1100V Dc Range
5700A/5720A Series II Calibrator Service Manual 2-157. 1100V DC Range Refer to Figure 2-26 for the following discussion. The High Voltage assembly (A15) amplifies the output of the DAC assembly (A11), set to the 11V range, by a gain of -100 to generate the 1100V dc range.
Page 165: High Voltage/High Current Assembly 1100V Dc Range
Theory of Operation Analog Section Detailed Circuit Description ahp023f.eps Figure 2-26. High Voltage/High Current Assembly 1100V DC Range 2-99...
Page 166: Dc Hv Amplifier/Ac Sense Buffer
5700A/5720A Series II Calibrator Service Manual When the DAC assembly is set to the +11V range, the output from the High Voltage assembly (with a gain of -100) is in the -1100V range. In this mode, -SP C is connected to the collector of transistor Q3.
Page 167: High Voltage/High Current Assembly 2.2A Ac And Dc Ranges
Theory of Operation Analog Section Detailed Circuit Description ahp024f.eps Figure 2-27. High Voltage/High Current Assembly 2.2A AC and DC Ranges 2-101...
Page 168: A Power Supply Filter Circuit
5700A/5720A Series II Calibrator Service Manual Resistor network Z5 and hybrid H4 determine the performance of the 2.2A range. Current from the A7 assembly develops a voltage across the 57W portion of Z5. The 2.2A current amplifier circuit forces the same voltage across the 0.57W portion of Z5. Because the ratio of these resistors is 100, the current through 0.57W resistor is 100 times that coming from the Current assembly (A7).
Page 169: High Voltage Digital Control
Theory of Operation Analog Section Detailed Circuit Description collector voltage on the output stage transistors (Q11, Q14). This is done by controlling the magnitude of the HVCL signal. The controlling function is described later in the Magnitude Control theory. 2-163. High Voltage Digital Control Digital control circuitry on the High Voltage Control assembly (A14) also contains the control for the High Voltage/High Current assembly (A15).
Page 170: Calibration Of The Ac Function
5700A/5720A Series II Calibrator Service Manual of both 1100V ac and dc ranges. Calibration involves determining its offset and gain constants. To determine the offset, DAC outputs are connected to 70 kΩ input resistor by K1. The output of the dc HV amplifier is inverted by U1 and its output is connected to the 7 MΩ feedback resistor by K9, K8B, and K6.
Page 171: High Voltage/High Current Assembly Calibration
Theory of Operation Analog Section Detailed Circuit Description ahp025f.eps Figure 2-28. High Voltage/High Current Assembly Calibration 2-105...
Page 172: Calibration Of The Current Function
5700A/5720A Series II Calibrator Service Manual 2-166. Calibration of the Current Function. Refer to Figure 2-29 for the following discussion. The resistor network Z5 determines the accuracy of the 2.2A current range. Calibration involves determining its offset and gain constants. The Calibrator is configured as in the 2.2A dc function, except that the Current assembly (A7) is set to the 2.2 mA range.
Page 173: High Voltage/High Current Assembly 2.2A Range Calibration
Theory of Operation Analog Section Detailed Circuit Description ahp026f.eps Figure 2-29. High Voltage/High Current Assembly 2.2A Range Calibration 2-107...
Page 174: Ohms Overview
5700A/5720A Series II Calibrator Service Manual The signal/polarity selection circuit generates the ERROR SIGNAL used by the error amplifier. It contains op amp U2C, CMOS analog switch U6, and resistor R35-R39. Control line V/I controls U6B and U6C which select the VI± when in the current mode. Control lines ±* and ±...
Page 175: Ohms Main Assembly (A10)
Ohms Main and Ohms Cal assemblies. 2-169. Ohms Main Assembly (A10) The Ohms Main assembly uses three Fluke hermetically-sealed thin film resistor networks (Z1, Z2 and Z3) to obtain values from 10Ω to 19 MΩ. The values are arranged in two strings, one for decade values and the other for the multiples of 1.9.
Page 176: Ohms Assemblies Simplified Schematic
5700/5720A Series II Calibrator Service Manual ahp38f.eps Figure 2-30. Ohms Assemblies Simplified Schematic 2-110...
Page 177: Ohms Main Assembly Simplified Schematic
Theory of Operation Analog Selection Detailed Circuit Description ahp39f.eps Figure 2-31. Ohms Main Assembly Simplified Schematic 2-111...
Page 178: Ohms Main Assembly Support Of Current Function Calibration
5700A/5720A Series II Calibrator Service Manual 2-171. Ohms Main Assembly Support of Current Function Calibration To calibrate the current function, the Current assembly routes output current to the Ohms Main assembly, where it is connected through a resistance. Current is determined by measuring the voltage across this resistance.
Page 179: 1, 1.9, And Short Resistance
Theory of Operation Analog Section Detailed Circuit Description Lines PC0-PC3 of port C go to decoder U13 and to the Ohms Main assembly. Decoder U13 enables two latch/driver ICs at a time. Setting the enable true (0V) causes the relay coils to be driven on or off depending on the contents of the latch portion of the selected ICs.
Page 180 5700A/5720A Series II Calibrator Service Manual ahp027f.eps Figure 2-32. Two-Wire Lead Drop Compensation Circuit 2-114...
Page 181: Ohms Calibration
Theory of Operation Analog Section Detailed Circuit Description 2-177. Two-Wire Compensation Power Supplies The floating supplies for U7 and U8 consist of a dc-to-dc converter made up of U6, T1 and associated components. Switching-regulator control IC U6 switches +17S through the primary of T1 at about 30 kHz as determined by R27 and C21.
Page 182 5700A/5720A Series II Calibrator Service Manual ahp028f.eps Figure 2-33. Calibration to an External 10 kΩ Standard 2-116...
Page 183 Theory of Operation Analog Section Detailed Circuit Description 2-181. Calibrating to the External 10 KW Standard Refer to Figure 2-33 for the following discussion. The first step in ohms calibration is to compare the 10 kΩ standard against the 10 kΩ value on the Ohms Cal assembly. This is done by passing a current through both values and measuring the voltage drop across each.
Page 184 5700A/5720A Series II Calibrator Service Manual OHMS SENSE HI is connected to INT SENSE HI by K16 and K2 on the Ohms Main assembly. INT SENSE HI is connected to the SENSE HI binding post by relay K2 on the motherboard which is the sense high side of the 10 kΩ...
Page 185 Theory of Operation Analog Section Detailed Circuit Description The 10Ω, 19Ω, 100Ω and 190Ω resistance values are determined using 2V from the 2/5/10V source and using internal 10:1 divider (Z5) in conjunction with the DAC. To get 2V, Q2 and Q3 are both turned on, which parallels both the 11.535 kΩ value and the 3.846 kΩ...
Page 186: Ratio Calibration, 10Ω From 100Ω
5700A/5720A Series II Calibrator Service Manual ahp029f.eps Figure 2-34. Ratio Calibration, 10Ω From 100Ω 2-120...
Page 187: Current/High Resolution Oscillator Assembly Overview (A7)
Theory of Operation Analog Section Detailed Circuit Description 2-185. Calibrating to the External 1W Standard The 1Ω and 1.9Ω resistor values are calibrated by comparing them against a 1Ω external standard. The technique used is different from that used for the 10 kΩ external standard. The Current assembly supplies a 130 mA (65 mA for 1.9Ω...
Page 188: Current Section
5700A/5720A Series II Calibrator Service Manual Relay driver U11 controls the three non-latching relays K14, K15, and K17 on this assembly. It also generates control line RLY11* to control K11 on the Motherboard. Relay K11 routes I-GUARD, described later, to the rear panel for operation when the rear-panel binding posts are in use.
Page 189: Current Output Simplified Schematic
Theory of Operation Analog Section Detailed Circuit Description ahp030f.eps Figure 2-35. Current Output Simplified Schematic 2-123...
Page 190 5700A/5720A Series II Calibrator Service Manual The input signal return paths are selected for ac or dc operation by control lines FET1 and FET2, and NMOSFETs Q20-Q23. With a dc or 13V reference input, control line FET1 goes high, turning on Q21 and Q22, connecting RCOM and DAC OUT LO to the respective circuit.
Page 191 Theory of Operation Analog Section Detailed Circuit Description Table 2-15. Relay Settings for Current Range Selection Range Relay 220 µA 2.2 mA 22 mA 220 mA S=SET R=RESET 2-192. Feedback Loop The output current develops a 2.2V full-scale voltage across the appropriate shunt resistors.
Page 192: Current Assembly Calibration
5700A/5720A Series II Calibrator Service Manual Internal calibration of the 2.2A range and gain of the High Voltage/High Current assembly is discussed further in the theory for the High Voltage assemblies. 2-195. Current Guard Buffer Buffer amplifier U4, configured as a voltage follower, is used to provide a guard voltage equal to the output voltage across the external load.
Page 193 Theory of Operation Analog Section Detailed Circuit Description ahp031f.eps Figure 2-36. Current Assembly Calibration 2-127...
Page 194: High-Resolution Oscillator Section
5700A/5720A Series II Calibrator Service Manual amplifier is connected to RCL, which is routed to the adc circuit on the DAC assembly. The adc circuit measures the voltage, which is the drop across the 100Ω resistor with no current applied through it. This value is the checkpoint reading and is stored in memory. The output of the Current assembly is reconnected to the 100Ω...
Page 195 Theory of Operation Analog Section Detailed Circuit Description 990 Hz and five digits resolution from 1000.0 Hz to 1.1999 kHz. The resolution break points are similar for the other ranges. 2-200. Reference Frequency Amp/Divider A 2-MHz reference frequency is generated by the reference frequency amp/divider circuit as outlined on the schematic.
Page 196: Rear Panel Assembly (A21)
5700A/5720A Series II Calibrator Service Manual Supply voltage is applied to vco U19 whenever the Hi-Res function is used by the circuitry containing analog CMOS switch U18A, transistor Q15, and zener diode VR3. VCO U19 is energized when control line HI-RES ON/OFF goes low to close U18A, which turns on transistor Q15, connecting zener diode VR3 to the -17LH power supply.
Page 197: Rear Panel Power Supplies
Theory of Operation Analog Section Detailed Circuit Description 2-205. Rear Panel Power Supplies Power supplies are divided into guarded and unguarded. Unguarded supplies +5V LOGIC, +12V, and -12V are referenced to +5V LOGIC COMMON and are generated on the Digital Power Supply assembly (A19). Guarded supplies +5LH and -5LH are referenced to LH COM, and the supply +5RLH is referenced to RLH COM.
Page 198: Clock Regeneration Circuit
5700A/5720A Series II Calibrator Service Manual 2-207. Clock Regeneration Circuit In order to minimize EMI (electro-magnetic interference) inside the Calibrator chassis, the rear panel accepts a low-level (~200 mV p-p sinewave) 3.68 MHz clock from the CPU assembly and conditions it to proper TTL clock levels. This is done by a differential amplifier, U18, which amplifies the incoming signals 3.6864MHZCLK and 3.6864MHZCLK*.
Page 199: Auxiliary Amplifier Interface
Theory of Operation Analog Section Detailed Circuit Description 5220EN* is the output enable for octal latch U10. 5220ADIR* is the output enable for buffer U11. 5205EN* is the output enable for octal latch U9. 2-210. Auxiliary Amplifier Interface A 5725A amplifier can be physically connected to the 5700A/5720A Series II. Only one can be used at a time.
Page 200: Rear Panel Relay Control
5700A/5720A Series II Calibrator Service Manual Oscillator Output assembly theory of operation for a detailed description on the generation of P SHIFT. Resistor R18 serves as overcurrent protection for the BNC shell connection on J5. 2-213. Rear Panel Relay Control The relays on the Rear Panel assembly are used as the interfaces for the 5725A amplifier, or for switching the PHASE LOCK IN and VARIABLE PHASE OUT signals.
Page 201: Wideband Ac Module (Option -03)
Theory of Operation Analog Section Detailed Circuit Description • Seven control lines which comprise the CONTROL BUS • A low-level 3.6864 MHz clock (CLOCK, CLOCK*) • Eight data lines RPD0-RPD7 Interfacing between the Rear Panel data bus (D100-D107) and the CPU data bus (RPD0- RPD7) is done with a bus transceiver U1.
Page 202 5700A/5720A Series II Calibrator Service Manual In this circuit, WB MUXA, WB MUXB, and WB MUXC are decoded by U8 to generate four control lines, These are inverted and level-shifted by comparators in U10 and U11. The output of these comparators create 16-32 MHz FILTER, 8-16 MHz FILTER, 4-8 MHz FILTER, 2-4 MHz FILTER, 1-2 MHz FILTER, and Q8/Q9 SELECT, which are used in the filter switch drive circuitry.
Page 203 Theory of Operation Analog Section Detailed Circuit Description The vco frequency is controlled by varactor diodes, CR1 + CR2, which get their bias voltage from amplifier U2. Amplifier U2, which gets its input from the phase detector outputs (0V and 0R) of U1, changes the bias on varactor diodes CR1 and CR2 until the divided vco frequency has the same frequency and phase as the 50 kHz reference frequency at the input to the phase detector in U1.
Page 204: Wideband Output Assembly (A5)
5700A/5720A Series II Calibrator Service Manual and C112. FET Q105 is turned on, in the same manner as FET Q101, to connect the sine wave output of this filter to FILTER OUTPUT. This is applied to output driver transistor To obtain the required amount of filtering over the entire octave range, additional capacitors C110 and C111 are switched into the filter by PIN diodes CR102 and CR103 when operating below 70% of the full range (22 MHz in this case).
Page 205: Wideband Output Assembly Simplified Schematic
Theory of Operation Analog Section Detailed Circuit Description ahp032f.eps Figure 2-37. Wideband Output Assembly Simplified Schematic 2-139...
Page 206 5700A/5720A Series II Calibrator Service Manual 2. The second range is for operation at frequencies between 12 kHz and 1.1 MHz. In this mode the input signal is also from the Oscillator Output assembly, but the amplitude is controlled by the amplitude control circuit on the Wideband Output assembly.
Page 207 Theory of Operation Analog Section Detailed Circuit Description 2-224. Wideband Output Attenuators The 10 Hz to 30 MHz sine wave signal output of the power amplifier circuit connects to the 50Ω output attenuator composed of attenuator networks Z1 and Z2 and relays K4, K5, K6, K7, and K8.
Page 208 5700A/5720A Series II Calibrator Service Manual from damage by shunting its input and output to ground through the 200Ω resistors R2 and R18. The negative voltage at the output of U4A also turns off transistor Q1 and causes control line U9 ENABLE to go high. This disables relay driver U9, which turns off all attenuator relays (K4-K7) and output relay K8.
Page 209 Theory of Operation Analog Section Detailed Circuit Description connector is connected back to the OUTPUT HI SENSE and OUTPUT LO SENSE binding posts. Attenuation is calibrated starting with 70 dB and decreased in 10 dB steps to 0 dB. The Switch Matrix assembly connects the output of the Wideband AC module to its internal cal zero amplifier circuit during all attenuator calibrations except the 0 dB and 10 dB.
Page 210 5700A/5720A Series II Calibrator Service Manual 2-144...
Page 211: Calibration And Verification
Chapter 3 Calibration and Verification Title Page 3-1. Introduction................... 3-3 3-2. Accessing the Fuse................3-4 3-3. Cleaning the Air Filter ................3-5 3-4. Cleaning the Exterior ................3-6 3-5. Calibration .................... 3-6 3-6. Calibrating the 5700A/5720A Series II to External Standards ..... 3-6 3-7.
Page 212 5700A/5720A Series II Calibrator Service Manual 3-30. Wideband Flatness Calibration Procedure ........3-41 3-31. Optional Tests ..................3-42 3-32. DC Voltage Load Regulation Test ........... 3-42 3-33. DC Voltage Linearity Test ............... 3-43 DC Voltage Output Noise (10 Hz to 10 kHz) Test......3-43 3-34.
Page 213: Introduction
Calibration and Verification Introduction 3-1. Introduction This chapter gives procedures for 5700A/5720A Series II calibration, verification, acceptance testing, and performance testing. Information here applies to testing the performance of and calibrating a normally operating 5700A/5720A Series II. In case of malfunction, refer to Chapter 5, Troubleshooting, which explains how to use self diagnostic tests to identify a faulty module.
Page 214: Accessing The Fuse
5700A/5720A Series II Calibrator Service Manual 3-2. Accessing the Fuse The fuse is accessible from the rear panel. The fuse rating label to the right of the fuse holder shows the correct replacement fuse ratings for each operating voltage. To access the fuse, refer to Figure 3-1 and proceed as follows: 1.
Page 215: Cleaning The Air Filter
Calibration and Verification Cleaning the Air Filter 3-3. Cleaning the Air Filter Caution Damage caused by overheating may occur if the area around the fan is restricted, the intake air is too warm, or the air filter becomes clogged. The air filter must be removed and cleaned at least every 30 days, or more frequently if the calibrator is operated in a dusty environment.
Page 216: Cleaning The Exterior
5700A/5720A Series II Calibrator Service Manual 3-4. Cleaning the Exterior To keep the calibrator looking like new, clean the case, front panel keys, and lens using a soft cloth slightly dampened with either water or a non-abrasive mild cleaning solution that is not harmful to plastics.
Page 217: Calibration Requirements
±2.5 ppm, then the 5700A and the 5720A absolute uncertainty specifications listed in Table 3-1 for the traceable quantity of voltage must all be increased by ±1 ppm. Table 3-1. Standards for Calibrating 5700A/5720A Series II Fluke Traceable Nominal Uncertainty...
Page 218: Calibration Procedure
5700A/5720A Series II Calibrator Service Manual 3-9. Calibration Procedure Before you being this procedure make sure the calibrator is powered on and has completed the appropriate warm-up period. After you have finished calibration, but before you save the new constants, the calibrator presents the new changes as ±...
Page 219 Calibration and Verification Calibrating the 5700A/5720A Series II to External Standards 4. Enter the ambient temperature; then press E. The display shows: PREV MENU IF3-4.EPS 5. Connect the 732B to the calibrator as shown in Figure 3-3. VOLTAGE REFERENCE STANDARD 732B DC STANDARD CALIBRATOR AC PWR...
Page 220 5700A/5720A Series II Calibrator Service Manual 6. Enter the true value of the 732B 10V output. The true value is the value printed on the calibration sticker, plus or minus, as well as drift that has occurred since calibration. That drift can be estimated provided control charts have been maintained for the 732B.
Page 221 Calibration and Verification Calibrating the 5700A/5720A Series II to External Standards 8. Reverse the HI and LO connections at the 732B terminals, and press E. The following displays appear, asking you to wait before proceeding with the 10 kΩ standard. PREV MENU IF3-8.EPS...
Page 222 5700A/5720A Series II Calibrator Service Manual CALIBRATOR RESISTANCE STANDARD OUTPUT SENSE CURRENT SENSE Ω Ω WIDEBAND CHASSIS GUARD GROUND GROUND CURRENT F7-4.EPS Figure 3-4. 742A-1 and 742A-10k External Calibration Connections 10. To reject the changes, return to the calibration menu shown in step 2 by pressing P.
Page 223 Calibration and Verification Calibrating the 5700A/5720A Series II to External Standards 11. Disconnect the 10 kΩ standard, and connect the calibrator to the 1Ω standard; then enter the true value of the 1Ω standard. If the standard is not between 0.9Ω and 1.1Ω, an error message appears, which lets you start over from this point with another standard.
Page 224: Range Calibration
5700A/5720A Series II Calibrator Service Manual 3-10. Range Calibration Once calibration is complete, you may find you need to make further adjustments to the range. Calibrating the range is accomplished by adjusting a range constant, which is an additional gain multiplier. Although range calibration is not needed in order to meet total uncertainty specifications, it is useful for tuning the calibrator so that its values are closer to your own standards.
Page 225 Calibration and Verification Range Calibration PREV MENU IF3-2.EPS 3. Press the “Range Adjust” softkey to bring up the next menu shown below: PREV MENU IF3-18.EPS 4. Press the “DC V” softkey to bring up the next menu shown below: PREV MENU IF3-19.EPS 5.
Page 226 5700A/5720A Series II Calibrator Service Manual PREV MENU IF057.EPS 8. Press O to activate the calibrator output. Then turn the output adjustment knob on the calibrator until you achieve a null on the null detector. 9. Se the rear panel CALIBRATION switch to ENABLE. Press E on the front panel.
Page 227: Calibrating The Wideband Ac Module (Option 5700A-03)
The Wideband AC Module (Option 5700A-03) can be installed in either the 5720A or 5700A Series II calibrator. The module needs to be calibrated for both gain and flatness. The gain should be calibrated when the 5700A-03 main output functions undergo their routine calibration.
Page 228 5700A/5720A Series II Calibrator Service Manual Since frequency flatness is determined by stable parameters (i.e. circuit geometry and dielectric constants), the flatness of the Wideband AC Module has excellent long-term stability. Consequently, a two-year calibration cycle is adequate for flatness calibration, and can be scheduled to coincide with the calibrator’s shipment to a standards laboratory for periodic verification.
Page 229: Wideband Module Calibration Connection
Calibration and Verification Calibrating the Wideband AC Module (Option 5700A-03) CALIBRATOR OUTPUT SENSE Ω Ω Ω FEEDTHROUGH WIDEBAND GUARD GROUND CURRENT GND TAB F7-5.EPS Figure 3-6. Wideband Module Calibration Connection 4. Press the “Gain” softkey to bring up the following display: PREV MENU IF3-3.EPS...
Page 230: Performing A Calibration Check
5700A/5720A Series II Calibrator Service Manual 6. Reverse the dual-banana connector so that the center connector is connected to LO; then press E. The display shows the following: PREV MENU IF3-16.EPS After a short time, a message appears indicating that the wideband calibration is complete.
Page 231 Calibration and Verification Performing a Calibration Check PREV MENU IF3-3.EPS 3. Enter the ambient temperature; then press E. As the calibration check proceeds, the display indicates the current process of the calibration check. When the check is complete, the largest shift that is detected appears on the display. PREV MENU IF3-17.EPS...
Page 232: Full Verification
5700A/5720A Series II Calibrator Service Manual 3-13. Full Verification An independent external verification is recommended every two years, following normal periodic calibration or repair of the calibrator. Verification establishes and maintains parallel external traceability paths for the internal functions that are not adjusted or corrected during calibration.
Page 233: Required Equipment For All Tests
70%, allow a minimum of two hours warm-up. Extended storage at high temperatures and humidity may require up to four days of power-on stabilization. 2. If you are doing a regularly scheduled full verification as recommended by Fluke, calibrate the 5700A/5720A Series II as previously described before continuing with verification.
Page 234 Fluke 5790A ACV, ACI Resistance Standards Fluke 742A Series Cal, Ohms, DCI Reference Divider Fluke 752A DC V Null Detector EM Electronics N11 (Fluke 845A) DC V Shunt Adapter Fluke 792A-7004 AC I Calibrator Fluke 55X0A Ohms Frequency Counter Philips PM6669...
Page 235: Resistance Verification Test
Table 3-3. Equipment Required for Resistance Testing Equipment Decsription Resistance Standards Fluke 742A Series in the following values: 1Ω, 1.9Ω, 10Ω, 10 kΩ, 19 kΩ, 10 MΩ, and 19 MΩ Current Source Fluke 5500A or 5520A Wavetek 1281 or HP 3458A 1.
Page 236: Ohm And 10 Ohm Resistor Verification
5700A/5720A Series II Calibrator Service Manual INPUT SENSE 742A-X CURRENT SOURCE CALIBRATOR OUTPUT CURRENT SENSE OUTPUT SENSE (UUT) F3-5.EPS Figure 3-8. 1 Ohm and 10 Ohm Resistor Verification Note There is no need to do the cal current calculation of step 6 if the current source has a settability of ±3 ppm.
Page 237: Two-Wire Compensation Verification
Calibration and Verification Full Verification Table 3-4. Low Value Resistance Calibration Using a Current Source 5720A (UUT) Apply Current 5720A Deviation From 5720A Displayed Value Resistance Displayed Value (90-day) ±95 ppm 1Ω 100 mA 0.9995 to 1.0005 ±95 ppm 1.9Ω 100 mA 1.89905 to 1.90095 ±25.0 ppm...
Page 238: Dc Voltage Verification Test
Equipment Model DC Reference Standard Fluke 732B Reference Divider Fluke 752A Null Detector EM Electronics 11 (Fluke 845A) Low Thermal Cables 5440A-7002 5440A-7003 Note The 5440A-7002 or 5440A-7003 is for the 5700A; the 5720A uses only the 5440A-7003. Proceed as follows to perform the dc voltage verification test: 1.
Page 239: Dc Voltage One-Tenth Scale Linearity Test
Calibration and Verification Full Verification 3-19. DC Voltage One-Tenth Scale Linearity Test Note If the result of the previous test at 1V on the 11V range was less than µ V it is not necessary to perform this test. This test uses the same equipment as the previous test. Proceed as follows to perform the DC Voltage One-Tenth Scale Linearity Test: 1.
Page 240: Direct Current Accuracy Verification Test
L&N 4221B (0.1Ω at 2A) Fluke 742A-1 (1Ω at 200 mA) Fluke 742A-10 (10Ω at 20 mA) Fluke 742A-1k (1 kΩ at 2 mA) Fluke 742A-10k (10 kΩ at 200 µA) Use Table 3-20 (5720A) and Table 3-21 (5700A) for the test records.
Page 241: Ac Voltage Frequency Accuracy Test
5. Algebraically add column B to column A. Enter the result on the test record. Verify that it is within the test limits shown. 6. Repeat steps 2 through 5 using the Fluke 742A Resistance Standards and Calibrator output currents shown in Tables 3-25 or 3-26.
Page 242 5700A/5720A Series II Calibrator Service Manual Use Table 3-23 (5720A) or Table 3-24 (5700A) for the test records. 1. Place the 5790A on top of the Calibrator and connect the equipment as shown in Figure 3-11. Note The point of measurement is at the end of the cable and adapter that connects to the 5790A.
Page 243 Model or Description AC Measurement standard Fluke 5790A Current Shunts Fluke A40 Series: 20 mA, 200 mA, 2A, and A40A Series: 10A (if verifying a 5725A) , with AC-DC difference corrections. Current Shunt Adapter Fluke 792A-7004 A40 current shunt adapter Cable Pomona 1368-A-18.
Page 244 5700A/5720A Series II Calibrator Service Manual 1. Connect the equipment as shown in Figure 3-12(A) use the 2A shunt. 2. Enter the ac to dc difference corrections for each shunt at each frequency in the appropriate column of the test record (Table 3-26 or 3-27). 3.
Page 245: Alternating Current Test Setup
A. Alternating Current Test Setup, 22 mA to 2A Using 5790A Input 1 Calibrator (UUT) A40A 10A Pomona Cable Current Shunt 5268-C-12 5790A 5725A (UUT) Input 1 Black 792A-7004 FLUKE A45-4003 A40 Current P/N 212852 Shunt Adapter Cable UHF(M) to BNC(F) Pomona Model 1707 Adapter UHF(F) to Banana Kings KC-99-34 Adapter B.
Page 246 Ranges Equipment Model or Description AC Measurement Standard Fluke 5790A 200Ω, 1/8w, ±1%, T9 (P/N 309724) mounted on a dual banana plug. Metal Film Resistor 2 kΩ, 1/8w, ±1%, T9 (PN 335422) mounted on a dual banana plug Metal Film Resistor Cable Pomona 1368-A-18.
Page 247: Rationale For Using Metal-Film Resistors To Measure Ac Current
Calibration and Verification Full Verification 9. Change the Calibrator frequency to 20 Hz, 40 Hz, 1 kHz, 5 kHz and 10 kHz. At each frequency record the error display on the 5790A in Table 3-28 or 3-29. Verify that the results are within limits shown. 10.
Page 248: Wideband Frequency Accuracy Test
5700A/5720A Series II Calibrator Service Manual Note The input impedance at INPUT 2 of the 5790A on the millivolt ranges is 10 Ω shunted by 83 pF and the cable used to connect the shunt resistor to the 5790A has 40 pF capacitance, for a total of 123 pF. The reactance of 123 pF at 10 kHz is 129 kΩ, and using formula (1), in the case where R=2 kΩ, the network impedance Z = 1.999760 kΩ.
Page 249: Wideband Output Accuracy At 1 Khz Test
Wideband Output Accuracy at 1 kHz Test Table 3-11. Equipment Required for Testing and Calibrating the Wideband Option Equipment Model or Description AC Measurement Standard Fluke 5790A with Wideband Option -03 Wideband cable Supplied with 5700A-03 50Ω Termination Supplied with 5700A-03 Adapter Pomona 1269 BNC(F) to dual banana plug.
Page 250: Wideband Output Flatness Test
5700A/5720A Series II Calibrator Service Manual Table 3-12. Wideband Adjustment Tolerance 5700A/5720A Series II Wideband 5790A Adjustment Counts ± ppm Output 2.10000V 1.00000V 300.000 mV 100.000 mV 30.0000 mV 10.0000 mV 3.00000 mV 1000.00 µV 3-29. Wideband Output Flatness Test Use Table 3-32 as a test record.
Page 251: Wideband Flatness Calibration Procedure
Calibration and Verification Wideband Output Flatness Test 3-30. Wideband Flatness Calibration Procedure This procedure is the only part of full verification that stores calibration constants in the Calibrator. This is not a verification test, it is a calibration procedure. Because this part of calibration is recommended to be done only every two years, the same interval as full verification, it is included here and not under Calibration earlier in this chapter and in Chapter 7 of the 5700A/5720A Series II Operator Manual.
Page 252: Optional Tests
DC Voltage Reference Standard Fluke 732B Reference Divider Fluke 752A Null Detector EM Electronics N11(Fluke 845A) Kelvin-Varley Divider Fluke 720A 3-32. DC Voltage Load Regulation Test Use Table 3-34 for a test record. Proceed as follows to test the dc voltage load regulation: 1.
Page 253: Dc Voltage Linearity Test
Calibration and Verification Optional Tests 3. Repeat load regulation testing at the remaining Calibrator outputs shown in Table 3-47. 4. Set the Calibrator to standby and disconnect all equipment from the Calibrator. 3-33. DC Voltage Linearity Test Use Table 3-35 for a test record. Proceed as follows to test the dc voltage linearity: 1.
Page 254: Dc Voltage Output Noise Test Setup
5700A/5720A Series II Calibrator Service Manual CALIBRATOR OSCILLOSCOPE TRUE RMS MAINFRAME* VOLTMETER (UUT) 7A22 VERTICAL PLUG-IN OUTPUT COAX SHIELDED TWISTED PAIR CLIP LEADS 3' APPROX GR BANANA PLUGS OSCILLOSCOPE AND AC DIFFERENTIAL SHIELDED TWISTED PAIR CABLE DETAIL VOLTMETER SHOULD BE ISOLATED FROM THE POWER LINE GROUND.
Page 255: Ac Voltage Distortion Test
Calibration and Verification Optional Tests 3-35. DC Voltage Output Noise 1 to 10 Hz Test Proceed as follows to test for dc voltage output noise in the range 0.1 to 10 Hz: 1. Place the 8520A DMM into Math Program 8 with the Display Option Register set to register 8.3 (Standard Deviation Computed Variable)as follows: a.
Page 256: Ac Voltage Overshoot Test
5700A/5720A Series II Calibrator Service Manual Note Ω If the spectrum analyzer input impedance is 50 , do not use a separate termination. 2. With 0 dBm output programmed from the Calibrator wideband output, select frequencies over the band of 1 MHz to 30 MHz and verify that use the spectrum analyzer to verify that any harmonics are below -40 dBm for fundamentals up to 10 MHz and below -34 dBm for fundamentals of 10 MHz and above.
Page 257 Voltage Reference Fluke 732B 10V nominal, true value certified to within ±1.5 ppm Resistance Standards Fluke 742A Series, 1Ω 1Ω nominal, true value certified to within 10 and 10 kΩ ppm, 10 kΩ nominal, true value certified to within 4 ppm...
Page 258: Determining Test Limits For Other Calibration Intervals
DC Current Shunt (2) Fluke Y5020 Range: 10A Uncertainty: ±0.008% AC/DC Current Shunt Fluke A40-20 mA Ranges: 20 mA, 200 mA, 2A and 10A Fluke A40-200 mA Frequency: 10 Hz to 10 kHz Uncertainty: ±310 ppm at 10 Hz; ±100 ppm Fluke A40-2A at 20 Hz;...
Page 259 Example 2 shows you how to calculate a specification limit and a tighter test limit. For instrumentation that have the precision of the 5720A/5700A Series II calibrators, it is difficult obtain standards which are many times more accurate than the calibrator specifications.
Page 264 5700A/5720A Series II Calibrator Service Manual Table 3-18. DC Voltage Test Record for 5720A 5720A Null Detector Divider 5720A Null Det Limit Meter Limit Output Reading(µV) Setting Range (µV) Rattle (µV) ±1.20 (2) 0.1V 0.22V 0.1V ±4.8 µV (2) 2.2V 0.55 ±6 (2) 1V (3)
Page 265 Calibration and Verification Determining Test Limits for Other Calibration Intervals Table 3-19. DC Voltage Test Record for 5700A 5700A Null Detector Divider 5700A Null Det Limit Meter Limit Output Reading(µV) Setting Range (µV) Rattle (µV) ±1.45 (2) 0.1V 0.22V 0.1V ±7.2 (2) 2.2V 0.55...
Page 266 5700A/5720A Series II Calibrator Service Manual Table 3-20. Direct Current Accuracy Test Record (5720A) Characterizing dc DMM @ ±200 mV and ±2.0V Column A Column B DC DMM UUT Actual Test Limit, Output Rdg. Std Res UUT Error Setting Error (A+B) 90-day Current Correction...
Page 267 Calibration and Verification Determining Test Limits for Other Calibration Intervals Table 3-21. Direct Current Accuracy Test Record (5700A) Characterizing dc DMM @ ±200 mV and ±2.0V Column A Column B UUT Actual Test Limit, Output DC DMM Std Res UUT Error Error (A+B) 90-day Current...
Page 268 5700A/5720A Series II Calibrator Service Manual Table 3-23. 5720A AC Voltage Output Test Record 5790A Error Output Spec 1-Year Frequency Test Limit (4) Display Level (± ppm ) Spec Factor (± ppm) Reading (± ppm) 90-Day Test Record 2 mV 1 kHz 2590 1070...
Page 269 Calibration and Verification Determining Test Limits for Other Calibration Intervals Table 3-23. 5720A AC Voltage Test Record (cont) 5790A Error Output Spec 1-Year Frequency Test Limit (4) Display Level (± ppm ) Spec Factor (± ppm) Reading (± ppm) 200V 1 kHz 2.05 0.936...
Page 270 5700A/5720A Series II Calibrator Service Manual Table 3-24. 5700A AC Voltage Output Test Record 5790A Error Output Spec 1-Year Frequency Test Limit (4) Display Level (± ppm ) Spec Factor (± ppm) Reading (± ppm) 90-Day Test Record 2 mV 1 kHz 2610 1070...
Page 271 Calibration and Verification Determining Test Limits for Other Calibration Intervals Table 3-24. 5700A AC Voltage Output Test Record (cont) 5790A Error Output Spec 1-Year Frequency Test Limit (4) Display Level (± ppm ) Spec Factor (± ppm) Reading (± ppm) 200V 1 kHz 2.74...
Page 272 5700A/5720A Series II Calibrator Service Manual Table 3-26. 5720A AC Current 20 mA to 10A Accuracy Test Record 2A, 200 mA, 20 mA and 10A Test Record A40 Shunt UUT Error Calculated Output Freq Spec AC-DC Diff Display Error ± ppm Current 40 Hz 1 kHz...
Page 273 Calibration and Verification Determining Test Limits for Other Calibration Intervals Table 3-27. 5700A AC Current 20 mA to 10A Accuracy Test Record 2A, 200 mA, 20 mA and 10A Test Record (10A Only for 5725A) A40 Shunt UUT Error Calculated Output Freq Specs...
Page 274 5700A/5720A Series II Calibrator Service Manual Table 3-28. 5720A AC Current 2 mA and 200 µA Accuracy Test Record 5790A Test Limits Output Spec. Transfer ± ppm Frequency Error ± ppm Current Spec Factor ± ppm (90-day) 2 mA 10 Hz 1.45 0.874 2 mA...
Page 275 Calibration and Verification Determining Test Limits for Other Calibration Intervals Table 3-30. Wideband Frequency Accuracy Test Record Frequency ( Hz ) Frequency Measured Tolerance Limits 10 Hz 99.99 ms to 100.01 ms 100 Hz 9.999 ms to 10.001 ms 300 Hz 299.97 Hz to 300.03 Hz 500 Hz 499.95 Hz to 500.05 Hz...
Page 276 5700A/5720A Series II Calibrator Service Manual Table 3-31. Wideband Accuracy at 1 kHz Test Record 5790A Output Measured Spec Test 1-Year Spec ± ppm (90-day) Level Error Limit ± ppm Factor 2.1V 2238 1.000 2238 1.0V 2900 1.000 2900 0.3V 2833 74.5 1.000...
Page 277 Calibration and Verification Determining Test Limits for Other Calibration Intervals Table 3-32. Wideband Flatness Test Record (cont) 5790A Output Measured Spec Test Limit Frequency 1-Year ± ppm ± ppm Level Flatness Error Factor Spec (90-day) 30 mV 10 kHz 1000 2.00 0.932 120 kHz...
Page 278 5700A/5720A Series II Calibrator Service Manual Table 3-33. Wideband Absolute Error 10 Hz to 500 kHz 1 kHz Absolute Flatness Error Error Sum 90-Day Output Frequency Error Spec Limit Level (±ppm) 2.1V 10 Hz 5238 30 Hz 2238 10 kHz 2238 120 kHz 2238...
Page 279 Calibration and Verification Determining Test Limits for Other Calibration Intervals Table 3-34. Load Regulation Test Record 5700A/5720A Series II Div. Setting 5700A/5720A Series II Change In Null Change In Out/Full Load Range Measured Null Limit ±3.1 µV 10V/199Ω ±42 µV 100V 220V 100V/1999Ω...
Page 280 0.4% (1) The 5700A/5720A Series II maximum volt-Hertz product is (2.2 x 10 ) The 300V level assumes that a Fluke 5725A Amplifier is attached. Table 3-38. Test Record for Flatness Check of the AC 2 mV Range Frequency UUT Error Display Reading...
Page 281 A Message From Fluke Corporation Some semiconductors and custom IC's can be damaged by electrostatic discharge during handling. This notice explains how you can minimize the chances of destroying such devices 1. Knowing that there is a problem.
Page 282 8. WHEN REMOVING PLUG-IN ASSEMBLIES 5. USE STATIC SHIELDING CONTAINERS FOR HANDLE ONLY BY NON-CONDUCTIVE HANDLING AND TRANSPORT. EDGES AND NEVER TOUCH OPEN EDGE CONNECTOR EXCEPT AT STATIC-FREE WORK STATION. PLACING SHORTING STRIPS ON EDGE CONNECTOR HELPS PROTECT INSTALLED S.S. DEVICES. 6.
Page 283: Maintenance
Chapter 4 Maintenance Title Page 4-1. Introduction................... 4-3 4-2. Cleaning the Air Filter ................4-3 4-3. General Cleaning .................. 4-4 4-4. Cleaning PCA's ..................4-4 4-5. Access Procedures ................4-4 4-6. Top and Bottom Covers..............4-4 4-7. Digital Section Cover ............... 4-4 4-8.
Page 284 5700A/5720A Series II Calibrator Service Manual...
Page 285: Introduction
Maintenance Introduction 4-1. Introduction This section covers procedures that do not fall into the category of troubleshooting or repair. This includes access procedures, installation of the Wideband module (Option - 03), periodic cleaning, and other special service procedures. 4-2. Cleaning the Air Filter CAUTION Damage caused by overheating may occur if the area around the fan is restricted, the intake air is too warm, or the air filter...
Page 286: General Cleaning
5700A/5720A Series II Calibrator Service Manual 4-3. General Cleaning To keep the Calibrator looking like new, clean the case, front panel keys, and lens using a soft cloth slightly dampened with water or a non-abrasive mild cleaning solution that does not harm plastics. CAUTION Do not use aromatic hydrocarbons or chlorinated solvents for cleaning.
Page 287: Rear Panel Assembly Access
Maintenance Access Procedures REMOVE Figure 4-2. Rear Panel Removal 4-10. Rear Panel Assembly Access Refer to Figure 4-3 during the following procedure: REMOVE REMOVE REMOVE FACK SCREWS TO SEPARATE THE REAR PANEL CIRCUIT BOARD FROM THE METAL HOUSING. F4-3.EPS Figure 4-3. Rear Panel Assembly Access 1.
Page 288: Front Panel Removal And Installation
5700A/5720A Series II Calibrator Service Manual 5. Remove P11 from J11. Then remove the two paddle board mounting screws and separate the paddle board from the Rear Panel assembly. 6. Remove the jack screws for each connection on the rear panel housing, then gently lift the Rear Panel assembly out from the housing.
Page 289: Keyboard Assembly Removal And Installation
Maintenance Access Procedures 4-13. Keyboard Assembly Removal and Installation The following procedure assumes that the Display Assembly Removal procedure has already been completed. 1. Remove all output cable connections (including GROUND-to-metal) from the front panel binding posts. Save all removed hardware. 2.
Page 290: Analog And Digital Assemblies
5700A/5720A Series II Calibrator Service Manual IEEE RS232 A21 REAR PANEL PCA VOLTAGE SELECT SWITCHES A18 FILTER/PA SUPPLY PCA A17 REGULATOR/GUARD CROSSING PCA CAPTIVE A16 POWER AMPLIFIER PCA SCREWS A15 HIGH VOLTAGE/HIGH CURRENT PCA (COMPONENTS FACE REAR) A14 HIGH VOLTAGE CONTROL PCA A13 OSCILLATOR OUTPUT PCA A12 OSCILLATOR CONTROL PCA A11 DAC PCA...
Page 291: Digital Assembly Removal And Installation
Maintenance Front/Rear Binding Post Reconfiguration 4-15. Digital Assembly Removal and Installation Remove the CPU Assembly or the Digital Power Supply Assembly by pulling straight up at the top corners of the assembly. In relation to the chassis side, the CPU Assembly components face toward, and the Digital Power Supply Assembly components face away.
Page 292 5700A/5720A Series II Calibrator Service Manual Reverse this procedure when changing from rear to front output operation. 1. Remove instrument top and bottom covers and remove bottom analog guard cover. 2. Remove the instrument front panel by removing the three hex screws on each front handle side and a single screw on the top of the front panel.
Page 293: Installing A Wideband Ac Module (Option -03)
Maintenance Installing a Wideband AC Module (Option -03) 4-19. Installing a Wideband AC Module (Option -03) CAUTION The Wideband option circuit board assemblies contain static- sensitive components. Use caution to avoid static discharge when handling the modules. The procedure that follows can be used to install a 5700A-03 Wideband AC Voltage module in a Calibrator.
Page 294: Using Remote Commands Reserved For Servicing
5700A/5720A Series II Calibrator Service Manual 2. Follow the access procedures to remove the digital side cover. 3. Remove the CPU Assembly (A20). 4. Desolder and remove battery BT1. 5. Solder a replacement battery in place (refer to the parts list for replacement information if necessary.) 6.
Page 295 Maintenance Using Remote Commands Reserved for Servicing FATALITY? Description: Returns the list of the fatal faults logged since the list was last cleared by the FATALCLR command. (Sequential command.) Parameter: None Response: (String) The list of faults, one per line in the following format: <date>...
Page 296 5700A/5720A Series II Calibrator Service Manual 4-14...
Page 297: Troubleshooting
Chapter 5 Troubleshooting Title Page 5-1. Introduction................... 5-3 5-2. Interpreting Diagnostic Fault Codes ............. 5-3 5-3. Component-level Troubleshooting ............5-40 5-4. Troubleshooting the Wideband Output Assembly (A5)....5-40 5-5. Troubleshooting the Wideband Oscillator Assembly (A6) ....5-42 5-6. Troubleshooting the Current/Hi-Res Assembly (A7)....... 5-47 5-7.
Page 298 5700A/5720A Series II Calibrator Service Manual...
Page 299: Introduction
Further on, under Component Level Troubleshooting, techniques for isolating faulty components or circuits are described. The Component Level Troubleshooting is only for qualified service personnel who do not wish to replace a faulty module through the Fluke Module Exchange Program. (Refer to Section 1 for module exchange instructions.)
Page 300 5700A/5720A Series II Calibrator Service Manual 2704 Spare This fault code is not used. 2705 A7: Oven Regulation Fault The heater voltage of the current hybrid is measured by dividing OVEN TEMP down and connecting it to the SDL line where it is measured by the adc circuit on the DAC assembly to ensure the hybrid is warmed up and regulating.
Page 301 Troubleshooting Interpreting Diagnostic Fault Codes 2713 A7: Hi-Res Loop In 100Hz Range The instrument is set for 2.0V at 100 Hz operation. The input voltage to the VCO circuit is resistively divided to create the control line HI-RES LOOP. HI-RES LOOP is connected to the SDL line where it is measured by the adc circuit on the the DAC assembly.
Page 302 5700A/5720A Series II Calibrator Service Manual 2801 A11: 8255 Port a Wires The diagnostics software writes and reads data to port A of the 8255 IC on the DAC assembly. A failure indicates the DAC assembly (A11) is probably at fault. 2802 A11: 8255 Port B Data Bus The diagnostics software reads port B of the 8255 IC on the DAC assembly.
Page 303 Troubleshooting Interpreting Diagnostic Fault Codes 2808 A11: ADC Amp Gain Error The DAC is set to 0.1V on the 11V range and connected to the +input of the DACs adc amplifier circuit and the -input is connected to common. The adc amplifier has a nominal gain of 11 resulting in 1.1V at the adc amplifier output.
Page 304 5700A/5720A Series II Calibrator Service Manual 2815 A11: 6.5V Reference Fault The DAC's 6.5V reference (REF6) is connected to the -input of the adc circuit and the DAC output (DAC SENSE CAL) is connected to the +input. The 6.5V reference is measure by adjusting the DAC until a null is achieved.
Page 305 Troubleshooting Interpreting Diagnostic Fault Codes 2822 A8/A11: -11/22V DC Zero Estimate Fault The DAC is in either the -11V or -22V range. Its output (DAC SENSE CAL) is connected to the +input of the adc circuit and the -input is connected to RCOM. The zero is estimated by adjusting the DAC until a null is achieved.
Page 306 5700A/5720A Series II Calibrator Service Manual 3103 A14: 8255 Port C Fault The diagnostics software reads port C of the 8255 IC on the High Voltage Control assembly. A failure indicates the High Voltage Control assembly (A14) is probably at fault.
Page 307 Troubleshooting Interpreting Diagnostic Fault Codes 3109 A15: HV +DC Preamplifier Fault The instrument is set to the dc 1100V range with the amplitude set to 220V, 600V, and 1100V. The output of the DC HV AMPLIFIER/AC SENSE BUFFER circuit of the High Voltage/High Current assembly is measured for 0.55V ±0.2V.
Page 308 5700A/5720A Series II Calibrator Service Manual line for measurement by the adc circuit on the DAC assembly. This failure occurs if the expected output voltage is not within 12% of the nominal. 3116 A15: HV -DC Reference/error Amp Fault The instrument is set to the dc 1100V range with the amplitude set to -220V, -600V, and -1100V.
Page 309 Troubleshooting Interpreting Diagnostic Fault Codes 3122 A14/A15: HV AC 1kHz, Preamp (Lo) The instrument is configured to the ac 1100V range with on amplitude of 220V at 1 kHz. The output of the DC HV AMPLIFIER/AC SENSE BUFFER circuit of the High Voltage/High Current assembly is measured for 0.0V ±0.2V.
Page 310 5700A/5720A Series II Calibrator Service Manual 3128 A14/A15: HV AC 1kHz, Output (Lo) The instrument is configured to the ac 1100V range with on amplitude of 220V at 1 kHz. The high voltage output is divided and converted to a dc voltage by the OUTPUT PEAK MEASURE circuit to create MUX5.
Page 311 Troubleshooting Interpreting Diagnostic Fault Codes 3134 Spare This fault code is not used. 3135 Assembly A14 Not Responding At power up the instrument checks to see what assemblies are not installed. This test verifies that the High Voltage Control assembly is not responding. A failure indicates the High Voltage Control assembly is probably at fault.
Page 312 5700A/5720A Series II Calibrator Service Manual 3140 A14/A15/A16: 2.2A AC Range Abs. Value The instrument is configured to the ac 2.2A range and set for an output current of 0.22A at 1 kHz, 0.6A at 1 kHz, 1.1A at 1 kHz, 0.6A at 40 Hz, and 1.1A at 50 Hz. The output current from the High Voltage/High Current assembly is routed to the Current assembly where it is connected to the 1.2Ω...
Page 313 Troubleshooting Interpreting Diagnostic Fault Codes 3303 A9: 8255 Port C Fault The diagnostics software reads port C of the 8255 IC on the Ohms Cal assembly (A9) during the instruments dormant state. A failure indicates the Ohms Cal assembly (A9) is probably at fault.
Page 314 5700A/5720A Series II Calibrator Service Manual 10 mV. A failure indicates the Differential Amplifier circuit on the Ohms Cal assembly (A9) is probably at fault. 3309 A9: Diff Amp Gain Fault The gain (nominal gain of 75) Differential Amplifier circuits on the Ohms Cal assembly (A) is checked.
Page 315 Troubleshooting Interpreting Diagnostic Fault Codes 3315 A9/A10: 10 Ohm Cal Diag Fault The 2/5/10V SOURCE circuit is set for 2V and connected across the 100Ω string on the Ohms Main assembly. The resulting 0.2 V across the 10Ω portion is connected to the - input of the Differential Amplifier on the Ohms Cal assembly.
Page 316 5700A/5720A Series II Calibrator Service Manual 3321 A9/A10: 10M Ohm Ratio Fault The 2/5/10V SOURCE circuit on the Ohms Cal assembly is set to 10V which is routed to the Ohms Main assembly and connected to the 10 MΩ string. The resulting 1V across the 1 MΩ...
Page 317 Troubleshooting Interpreting Diagnostic Fault Codes 3327 A9/A10: 1 Kilohm Check Fault The Current assembly (A7) outputs 1.3 mA which is routed to the Ohms Main assembly (A10), via INT OUT HI, where it is connected to the 1 kΩ string. The voltage drop across the 1 kΩ...
Page 318 5700A/5720A Series II Calibrator Service Manual 3334 A9/A10: 1.9 Ohm Check Fault The Current assembly (A7) outputs 13 mA which is routed through the Ohms Main assembly (A10), via INT OUT HI, to the Ohms Cal assembly (A9) where it is connected to the 1.9Ω...
Page 319 Troubleshooting Interpreting Diagnostic Fault Codes assembly. The resulting 0.2V across the 10 kΩ portion of Z5 is connected to the +input of the differential amplifier. The output of the differential amplifier is routed to the adc circuit on the DAC assembly, via the RCL line, and measured for 0V ±3% ±15 mV. A failure indicates the calibration of the 100Ω...
Page 320 5700A/5720A Series II Calibrator Service Manual 3406 A13: 8255 Port B The diagnostics software reads port B of the 8255 IC on the Oscillator Output assembly during the instruments dormant state. A failure indicates the Oscillator Output assembly (A13) is probably at fault. 3407 A13: 8255 Port C The diagnostics software reads port C of the 8255 IC on the Oscillator Output assembly during the instruments dormant state.
Page 321 Troubleshooting Interpreting Diagnostic Fault Codes within ± 100 mV. A failure indicates the Oscillator Control assembly (A12) is probably at fault. 3414 A12/A13: Nonlinear Control Loop 2vrng The instrument is set for 1V 1 kHz operation. Signal ERROR INT. OUT on the Oscillator Control assembly is measured via the SDL line to be 0V ±5.0V.
Page 322 5700A/5720A Series II Calibrator Service Manual measured via the RCL line. The output of this ac/ac sensor is measured by comparing it to the DAC assembly output voltage. The difference is measured to be 0V ±100 mV. A failure indicates the Oscillator Control assembly (A12) is probably at fault. 3422 A12: AC Cal Sensor (20V Range) The instrument is set for 21.9V 1 kHz and configured as in the 20V range ac/ac calibration.
Page 323 Troubleshooting Interpreting Diagnostic Fault Codes 3503 A16: 8255 Port C The diagnostics software read port C of the 8255 IC on the Power Amp assembly. A failure indicates the Power Amp assembly (A16) is probably at fault. 3504 Spare This fault code is not used. 3505 Spare This fault code is not used.
Page 324 5700A/5720A Series II Calibrator Service Manual resulting in a -130V Power Amplifier output. The second is the normal 220V dc operation with the input voltage from the DAC assembly. In this mode the Power Amplifier is outputting 22.1V, 100V, 219V, and -219V. In each mode the Power Amplifier output voltage is measured to be the nominal ±10% by connecting MUX3 to the SDL line where it is measured by the adc circuit on the DAC assembly.
Page 325 Troubleshooting Interpreting Diagnostic Fault Codes hybrid is warmed up and regulating. The heater voltage is measured to be 0.7V ±10% ±0.2V. A failure indicates the Power Amplifier assembly (A16) is probably at fault. 3521 Assembly A16 Is Not Responding At power up the instrument checks to see what assemblies are not installed. This test verifies that the Power Amplifier is not responding.
Page 326 5700A/5720A Series II Calibrator Service Manual 3529 A16: Power Amp 220V Range Attenuator Fault The Power Amplifier is configured to the dc 220V range with the input voltage being the 6.5V reference BRF6 and BSRF6. The resulting -130V at the output is connected to the input of the 220V RANGE AC ATTENUATOR circuit which has a nominal gain of -.01.
Page 327 Troubleshooting Interpreting Diagnostic Fault Codes Crossing assembly (A17) is faulty. If the voltage is within tolerance, the diagnostic circuit on the Oscillator Output assembly (A13) is faulty. 3605 -42S Supply Fault The instrument is dormant and the -44 S supply is out of tolerance. Measure the unregulated -44 S voltage on the Filter/PA Supply assembly (A18).
Page 328 5700A/5720A Series II Calibrator Service Manual Note All of the following connections and measurements are done on the Filter/PA Supply assembly (A18) in order to verify operation of the +PA supply. Connect DMM COM to TP203 and the high to TP201. Using a jumper, connect TP207 to TP203 and power on the instrument.
Page 329 Troubleshooting Interpreting Diagnostic Fault Codes 3615 S Com Ground Fault The Current/Hi Res assembly (A7) connects SCOM to the SDL line where it is measured by the adc circuit on the DAC assembly for 0V ±50 mV relative to RCOM. 3700 A21: 8255 Control Word The diagnostics software reads the control word of the 8255 IC on the Rear Panel assembly.
Page 330 5700A/5720A Series II Calibrator Service Manual 3801 A8: 8255 Port A Fault The diagnostics software writes and reads to port A of the 8255 IC on the Switch Matrix assembly. A failure indicates the Switch Matrix assembly (A8) is probably at fault. 3802 A8: 8255 Port B Fault The diagnostics software reads port B of the 8255 IC on the Switch Matrix assembly.
Page 331 Troubleshooting Interpreting Diagnostic Fault Codes 3808 A8: Zero Amp Hi Offset The Internal Cal Zero Amplifier circuit on the Switch Matrix assembly is tested for excessive offset in the high gain configuration. This is done by connecting the circuit input to RCOM, by turning on Q7, and connecting the output to the RCL line where it is measured by the adc circuit on the DAC assembly.
Page 332 5700A/5720A Series II Calibrator Service Manual 3822 Spare This fault code is not used. 3823 Spare This fault code is not used. 3824 A8: Oven Regulation Fault The heater voltage of the Switch Matrix HR1 hybrid assembly is measured to ensure it is warmed up and regulating by connecting OVEN TEMP to the SDL line where it is measured by the adc circuit on the DAC assembly.
Page 333 Troubleshooting Interpreting Diagnostic Fault Codes 3905 A6: Phase Lock Loop At 10MHz The Wideband assemblies are configured to 3.5V at 1.3 MHz, 1.2V at 1.3 MHz, 2.0V at 3.0 MHz, 1.0V at 4.1 MHz, 3.3V at 5.0 MHz, 2.0V at 6.0 MHz, 2.0V at 7.0 MHz, and 2.0V at 7.9 MHz.
Page 334 5700A/5720A Series II Calibrator Service Manual level it is checked for 0.0V ±0.7V. A failure indicates the Wideband Output (A5) assembly is probably at fault. 3911 A5/A6: Ampl. Control At 30MHz The Wideband assemblies are configured for a 3.5V and 1.2V output at 30.0 MHz. WB AMPLITUDE CONTROL which it the control signal to the Wideband Oscillator assembly is divided and connected to the SDL line for measurement by the adc circuit on the DAC assembly.
Page 335 Troubleshooting Interpreting Diagnostic Fault Codes 3916 A5: 20DB Output Attenuation Fault The 6.5V reference (BRF6, BSRF6) is connected to the Unity Gain Amplifier circuit on the Wideband Output assembly which drives the output through the Attenuators. The Wideband Output assembly is set for 20 dB attenuation so the 6.5V input results in a 0.325V output into 50Ω.
Page 336: Component-Level Troubleshooting
Use the following information alongside the schematic diagrams as a guide in troubleshooting if you do not wish to replace a faulty module through the Fluke Module Exchange Program. (Refer to Section 1 for module exchange instructions.)
Page 337 Troubleshooting Component-level Troubleshooting voltage at TP2 and verify it is 0.317 times the voltage at TP1 ±10%. If a failure is detected, check U5 and associated components. Note During Wideband operation, internal software monitors the output and makes corrections or trips the instrument to standby. This internal monitoring can cause problems when attempting to troubleshoot the Wideband Output assembly.
Page 338: Troubleshooting The Wideband Oscillator Assembly (A6)
5700A/5720A Series II Calibrator Service Manual voltages of 3V, 1V, 300 mV, and 30 mV, all at 1 kHz, and verify the DMM read the selected voltage ±5%. If a failure is detected, check K4-K8, Z1, and Z2. Next, connect the supplied output cable and 50Ω terminator to the WIDEBAND connector of the Calibrator front panel.
Page 339: Waveform At Tp1
Troubleshooting Component-level Troubleshooting logic high by measuring U15 pin 5. If the signal is incorrect, the control line WB ON/OFF* from the Wideband Output (A5) assembly is probably at fault. If the control line is correct check U15A and associated components. Note The input CLK and CLK* is a low-level (400 mV p-p) signal generated by the Regulator/Guard Crossing assembly.
Page 340 5700A/5720A Series II Calibrator Service Manual frequency counter to TP3 and adjust the external dc reference until the frequency counter reads 64 MHz ±0.1%. Using the frequency counter, measure the frequency at TP4 and verify it reads 32 MHz ±0.1%. If a failure is detected, check U4 and associated components.
Page 341: Waveform At Pins 14 And 15 Of U1
Troubleshooting Component-level Troubleshooting 10 ms F5-4.EPS Figure 5-4. Waveform at Pins 14 and 15 of U1 Note Power down the Calibrator, remove the external dc reference, and replace shorting header E6 on the J6 pins before continuing. 10. Check the Multiplexer U6 and its control lines. Power up the Calibrator and it to 1V at 1.2 MHz, operate.
Page 342: Waveform At Pin 6 Of U9
5700A/5720A Series II Calibrator Service Manual switches to a high(~+17V) level while all the others remain at a low (-11V) level. If a failure is detected, check U8, U10, U11, and U13. 14. Check the Filters. Disconnect the cable between the Wideband Oscillator assembly and Wideband Output assembly at J1 on the Wideband Output assembly.
Page 343: Troubleshooting The Current/Hi-Res Assembly (A7)
Troubleshooting Component-level Troubleshooting 5-6. Troubleshooting the Current/Hi-Res Assembly (A7) The Current/Hi-Res assembly generates output current and contains the high-resolution oscillator onto which the Oscillator Control assembly phase locks. Since these two functions are independent except for their digital control, troubleshooting procedures for each portion are presented separately.
Page 344: Waveform At Pin 6 Of K2
5700A/5720A Series II Calibrator Service Manual 4. Check the 220 µA range of the 220 µA/2.2 mA AMP circuit. Set the Calibrator to 200 µA, standby. Set the external ac reference to 6.4V(±0.1V) at 1 kHz. Using a DMM, measure the ac voltage at the collector of Q4 and verify it is 2.0V ac ±10%. If a failure is detected, first verify that the 10 kΩ...
Page 345: Verifying The 22 Ma Range Of The 22 Ma/220 Ma Amp Circuit
Troubleshooting Component-level Troubleshooting the shunt and output switching is correct check Q4, Q5, K3 and their associated components in the 220 µA /2.2 mA AMP circuit. 6. Check the 22 mA Range of the 22 mA/220 mA AMP. Set the Calibrator to 20 mA, standby.
Page 346: Verifying The 220 Ma Range Of The 22 Ma/220 Ma Amp Circuit
5700A/5720A Series II Calibrator Service Manual Ω 10 k Ω SHUNT 2V ac K9C, K8C, ±10% K7A, K5D, SCOM K10, K13 F5-11.EPS Figure 5-11. Verifying the 220 mA Range of the 22 mA/220 mA Amp Circuit 9. Check the POS. FB BUFFER. Set the Calibrator to 200 mA, standby. Set the external ac reference to 4.6V at 1 kHz.
Page 347: Hi-Res Oscillator Section
Troubleshooting Component-level Troubleshooting 5-8. Hi-Res Oscillator Section Proceed as follows to troubleshoot the Hi-Res Oscillator Section of the Current/Hi-Res assembly (A7): 1. Remove the four small shields (two on each side) and place the Current/Hi-Res assembly on the analog reverse extender card. Power up the Calibrator. Note All measurements are referenced to LHCOM (TP18).
Page 348 5700A/5720A Series II Calibrator Service Manual 5. Check VCO Supply Voltage. Set the Calibrator to 2V at 1 kHz, operate. Using a DMM measure the voltage at U19 pin 8 and verify it is -5.25V±7%. If a failure is detected, check U18A, Q15, VR3, and associated components. 6.
Page 349: Troubleshooting The Switch Matrix Assembly (A8)
Troubleshooting Component-level Troubleshooting 10 ms F5-14.EPS Figure 5-14. Waveform at TP13 8. Check the LOOP FILTER circuit. Power down the Calibrator, cut jumper E2 and connect an external variable dc reference (2 to 12V) to TP11(common to TP18). Power up the Calibrator and set it for 2V at 1 kHz. Connect a frequency counter to TP13 and adjust the external dc reference so the frequency counter read less than 10 MHz (~9.8 MHz).Connect an oscilloscope to U20 pin 7 and verify it displays a positive dc voltage.
Page 350 5700A/5720A Series II Calibrator Service Manual These relays are latched in the set or reset position and remain in that position even after power has been removed. To troubleshoot the signal path through the Switch Matrix assembly simply set the Calibrator to the function in which a problem is detected and then turn off the Calibrator.
Page 351: Troubleshooting The Ohms Cal Assembly (A9)
Power up the Calibrator and continue as follows. 2. Check the 1Ω, 1.9Ω, and short. Connect a four-terminal ohmmeter(such as a Fluke Model 8505A) to the Ohms Cal assembly as follows. Connect 8505A IN HI to TP1, 8505A IN LO to TP 2, 8505A SENSE HI to TP5, 8505A SENSE LO to TP6.
Page 352: Troubleshooting The Ohms Main Assembly (A10)
OHMS SENSE LO. Place the Ohms Main assembly on the extender card, power up the Calibrator, and continue as follows. 2. Connect a four-terminal ohmmeter (such as the Fluke Model 8505A) to the Ohms Main assembly as follows. Connect 8505A IN HI to TP4, 8505A IN LO to TP3, 8505A SENSE HI to TP5, and 8505A SENSE LO to TP2.
Page 353: Troubleshooting The Dac Assembly (A11)
Troubleshooting Component-level Troubleshooting Note The connection from the test points to the resistance values is through Ω latching type relays for all resistances except 10M, 19M, and 100 M values. These relays are put in the set or reset position and remain in that position even after power has been removed.
Page 354: Waveform At Tp6
5700A/5720A Series II Calibrator Service Manual 10 ms F5-17.EPS Figure 5-17. Waveform at TP6 10 ms F5-18.EPS Figure 5-18. Waveform at TP4, Calibrator Set to 0V 5-58...
Page 355: Waveform At Tp4, Calibrator Set To 6.5V
Troubleshooting Component-level Troubleshooting 10 ms F5-19.EPS Figure 5-19. Waveform at TP4, Calibrator Set to 6.5V 5. Check CH2 FILTER INPUT. Connect an oscilloscope probe to TP7 (common to TP3). Set the Calibrator to 6.5V dc, operate. Set the oscilloscope to 2V/div at 2 ms/div.
Page 356: Waveform At Tp5
5700A/5720A Series II Calibrator Service Manual Note The duty cycle may differ from this figure. Using the Calibrator edit knob, vary the second LSD of the Calibrator output display and verify that the duty cycle of the signal at TP7 changes. If either of these displayed signals are incorrect, skip to Duty Cycle Control Circuit.
Page 357: Duty-Cycle Control Circuit
Troubleshooting Component-level Troubleshooting 11. Check the OUTPUT BUFFER circuit. Set the Calibrator to 10V dc, operate. Measure the voltage with a DMM at L10 (common to TP3). It should be a nominal +10V dc (±0.25V for an uncalibrated instrument), free of distortion, and stable. If a failure is detected, check U5 and its associated components.
Page 358 5700A/5720A Series II Calibrator Service Manual 4. Check CH1 FLOATING. Connect an oscilloscope to U13 pin 6 (common to TP1). Set the Calibrator to 6.5V dc, operate, and the oscilloscope to 2V/div at 2 ms/div. The oscilloscope should display a TTL level signal similar to Figure 5-23. If a failure is detected, check U13 and its associated components.
Page 359 Troubleshooting Component-level Troubleshooting 10 ms F5-23.EPS Figure 5-23. Waveform at Pin 6 of U13 10 ms F5-24.EPS Figure 5-24. Waveform at Pin 4 of U10 5-63...
Page 360 5700A/5720A Series II Calibrator Service Manual 10 ms F5-25.EPS Figure 5-25. Waveform at TP6 10. Check CH1 SERIES B. Connect an oscilloscope to TP4 (common to TP3).Set the Calibrator to 6.5V dc, operate, and the oscilloscope to 10V/div at 2 ms/div. The oscilloscope should display a signal similar to previously shown Figure 5-19.
Page 361: Adc Circuit
Troubleshooting Component-level Troubleshooting 10 ms F5-26.EPS Figure 5-26. Waveform at Pin 7 of U12 5-15. ADC Circuit Proceed as follows to troubleshoot the ADC circuit: 1. Check the ADC INPUT select circuit. Set the Calibrator to 10V dc, operate. Verify that the voltage at U23 pin 7 (common to TP12) is 0.45V±7%.
Page 362: Buffered Reference Sip Assembly (A11A2)
5700A/5720A Series II Calibrator Service Manual 8. Check the ADC +6.4V Reference. Verify that the voltage at U27 pin 1(common to TP12) is 6.4±0.2V. If this voltage is incorrect, check U27B and associated components. 9. Check the ADC SAMPLE/HOLD +BOOTSTRAP supply. Set the Calibrator to standby.
Page 363: Troubleshooting The Oscillator Control Assembly (A12)
Troubleshooting Component-level Troubleshooting 5-17. Troubleshooting the Oscillator Control Assembly (A12) The first part of this troubleshooting procedure (steps 1 through 7) checks the averaging converter. The second part (steps 8 through 10) checks the AC/DC transfer circuit. Note During normal operation of the Calibrator, internal software monitors the output and makes corrections or trips the instrument to standby.
Page 364 5700A/5720A Series II Calibrator Service Manual 10 ms F5-27.EPS Figure 5-27. Waveform at Anode of CR4 10 ms F5-28.EPS Figure 5-28. Waveform at Pin 6 of U11 8. Check the DC SENSE BUFFER and the AC SENSE BUFFER. Set the Calibrator to 1.0V at 1 kHz, operate.
Page 365 Calibrator to 1.0V at 1 kHz, operate. Connect a DMM to TP7 (common to TP2) which is the output of the Fluke RMS Sensor. The DMM should read 3.16V dc ±160 mV. If this voltage is incorrect, check U14, U15, U17, and associated components.
Page 366: Troubleshooting The Oscillator Output Assembly (A13)
5700A/5720A Series II Calibrator Service Manual 10 ms F5-30.EPS Figure 5-30. AC Sense Buffer Waveform at TP6 5-18. Troubleshooting the Oscillator Output Assembly (A13) Note During normal Calibrator operation, internal software monitors the output and makes corrections or trips the instrument to standby. This internal monitoring can cause problems when attempting to troubleshoot the Oscillator Output assembly.
Page 367 Troubleshooting Component-level Troubleshooting 4. Next, jumper the input of the SUMMING AMPLIFIER to the -5S supply and check the following: • TP5: positive voltage • TP4: negative voltage • TP3: positive voltage • Pin 6 of U8: positive voltage 5. Repair any amplifier circuits which are not properly inverting. Reinstall feedback resistor R6.
Page 368: Troubleshooting The High Voltage Control Assembly (A14)
5700A/5720A Series II Calibrator Service Manual 11. Check the Phase Lock circuit. Connect a frequency counter to the Calibrator output. Set the Calibrator to 2V at 1 kHz, operate, and check the frequency accuracy to be within 0.01% of the nominal. If the frequency is out of tolerance, proceed as follows: a.
Page 369 Troubleshooting Component-level Troubleshooting 10 ms F5-31.EPS Figure 5-31. Waveform at TP3 3. Check the High Voltage Control in the 1100V ac range. Set the Calibrator to 220V at 110 Hz and 130 Hz, operate. At both output frequencies measure with a DMM the ac voltage at pin 1A or 1C of connector P611 and verify it reads 220±0.2V.
Page 370: Magnitude Control Circuit
5700A/5720A Series II Calibrator Service Manual CR4, and associated components. If the measure voltage is much greater than 227V skip to the Magnitude Control Circuit troubleshooting starting at step 10. 7. Check HV OUT from the High Voltage Control assembly. Set the Calibrator to +220V dc, operate.
Page 371: Troubleshooting The High Voltage/High Current Assembly (A15)
Troubleshooting Component-level Troubleshooting power up there is still no signal at TP3 during power up then check U3, U7C/D, and associated components in the Square Wave Amplifier circuit. 4. Check the Absolute Value Circuit. Add a jumper connecting the front panel OUTPUT HI binding post to the OUTPUT LO binding post.
Page 372 5700A/5720A Series II Calibrator Service Manual operation refer to Figure 2-25 in the Theory of Operation section. During normal operation in the 1100V ac mode, internal software monitors the output and makes corrections or trips the instrument into standby. This internal monitoring can cause difficulty when troubleshooting a faulty High Voltage assembly.
Page 373: Troubleshooting The Power Amplifier Assembly (A16)
Troubleshooting Component-level Troubleshooting 10 ms F5-32.EPS Figure 5-32. Waveform at Pin 18 of Hybrid H4 13. Connect an oscilloscope to pin 7 of U3B and verify it displays a square wave equal to the positive peaks of Figure 5-32. Next, connect the oscilloscope to pin 1 of U3A and verify it displays a square wave equal to the negative peaks of Figure 5-32.
Page 374 5700A/5720A Series II Calibrator Service Manual 1. Power up the Calibrator. In the following steps, reference all measurements to PACOM (TP10) unless otherwise Noted. 2. Set the Calibrator to 22V at 1 kHz, operate. This configures the Power Amplifier assembly as an amplifier with a gain of -10 as shown in Figure 5-33. Check the input for the correct voltage.
Page 375 Troubleshooting Component-level Troubleshooting 7. Check the output of the Output Stage. Set the Calibrator to 0V dc, standby. Connect an external 100Ω 1/4W carbon-film resistor between PACOM (TP10) and 1ST MID STAGE OUT, which is the left side of 1W resistor R41. Measure the dc voltage at the Mid-Stage output as is step 4.
Page 376: Troubleshooting The Filter/Pa Supply Assembly (A18)
TP205 to LO HI I (TP206). Connect an oscilloscope to the +PA Supply at TP201. Connect a 1 kΩ 10W resistor (such as Fluke P/N 157933) between PACOM (TP203) and the +PA supply output at Jumper 5-80...
Page 377 -PA Supply at TP204. Connect a 1 kΩ 10W resistor (such as Fluke P/N 157933) between PACOM (TP203) and the -PA supply output at Jumper J202. The -PA supply (at -180V)should go into current limit. The oscilloscope should show a repeating pattern in which the -PA supply climbs to about -180V then drops to 0V.
Page 378 5700A/5720A Series II Calibrator Service Manual 5-82...
Page 379: List Of Replaceable Parts
Chapter 6 List of Replaceable Parts Title Page 6-1. Introduction................... 6-3 6-2. How to Obtain Parts................6-3 6-3. Manual Status Information ..............6-3 6-4. Newer Instruments ................6-3 6-5. Service Centers ..................6-4 6-6. Parts List ....................6-4...
Page 380 5700A/5720A Series II Calibrator Service Manual...
Page 381: Introduction
Electrical components may be ordered directly from the manufacturer by using the manufacturer's part number, or from Fluke Corporation and its authorized representatives by using the part number under the heading FLUKE STOCK NO. Parts price information is available from the Fluke Corporation or its representatives. Prices are also available in a Fluke Replacement Parts Catalog which is available on request.
Page 382: Service Centers
5700A/5720A Series II Calibrator Service Manual 6-5. Service Centers To locate a service center, use the information located in Contacting Fluke earlier in this manual. 6-6. Parts List The following pages contain a complete parts list for the 5700A/5720A Series II Calibrators.
Page 383 List of Replaceable Parts Parts List Table 6-1. Front Panel Final Assembly Reference Fluke Stock Description Tot Qty Notes Designator KEYBOARD PCA 761049 FRONT PANEL PCA 761031 ANALOG MOTHERBOARD PCA 761023 DIGITAL MOTHERBOARD PCA 760942 CURRENT/HIGHT RESOLUTION OSCILLTOR. PCA 764613...
Page 384 5700A/5720A Series II Calibrator Service Manual 5700A-T&B f6-1.eps Figure 6-1. Front Panel Final Assembly...
Page 385 List of Replaceable Parts Parts List Table 6-1. Chassis Final Assembly Reference Fluke Stock Description Tot Qty Notes Designator TRANSFORMER/MODULE ASSEMBLY 813527 B1,B2 FAN/CONNECTOR ASSEMBLY 761213 BINDING HEAD, PLATED 102889 FUSE,.25X1.25,1.25A,250V,SLOW 109231 INSULATOR, ANALOG BOTTOM 775361 SCREW,PH,P,LOCK,SS,6-32,.500 320051 SCREW,PH,P,LOCK,STL,6-32,.750 114223 SCREW,PH,P,LOCK,STL,6-32,.250...
Page 386 5700A/5720A Series II Calibrator Service Manual 5700A T&B (1 of 2) f61a1.eps Figure 6-2. Chassis Final Assembly...
Page 387 List of Replaceable Parts Parts List 5700A T&B (2 of 2) f61a2.eps Figure 6-2. Chassis Final Assembly (cont)
Page 388 5700A/5720A Series II Calibrator Service Manual Table 6-1. Rear Panel Final Assembly Reference Fluke Stock Description Tot Qty Notes Designator FUSE,.25X1.25,1.25A,250V,SLOW 851936 FILTER, AIR 813493 SCREW,CAP,SCKT,SS,8-32,.375 837575 SCREW,PH,P,LOCK,STL,6-32,.750 114223 SCREW,PH,P,LOCK,STL,6-32,.250 152140 REAR PANEL 886387 GROMMET,EXTRUDED,POLYETHYLENE,.085 854351 DECAL, REAR OUTPUT CABLE DIAGRRAM 886291 GROMMET,NYLON,NAT,.056X.150X.100X.155...
Page 389 List of Replaceable Parts Parts List 5700A-T&B f61b.eps Figure 6-3. Rear Panel Final Assembly 6-11...
Page 390 5700A/5720A Series II Calibrator Service Manual Table 6-2. A1 Keyboard PCA Reference Fluke Stock Description Tot Qty Notes Designator CR1-4 LED,GREEN,SUBMINIATURE 912241 DT1, DT2 ISOLATOR,OPTO,OPTICAL SWITCH,INFRARED 523530 CABLE, KEYBOARD/REAR PANEL 791657 6-12...
Page 391 List of Replaceable Parts Parts List 5700A-1603 57001603.EPS Figure 6-4. A1 Keyboard PCA 6-13...
Page 392 5700A/5720A Series II Calibrator Service Manual Table 6-3. A2 Front Panel PCA Reference Fluke Stock Description Tot Qty Notes Designator C1, C2 CAP,TA,47UF,+-20%,10V 746990 C4,C9-20,C28, CAP,CER,0.1UF,+-10%,25V,X7R,1206 747287 C30,C35,C37, 747287 C39-046,C64 747287 C3,C21-27,C29, CAP,TA,10UF,+-20%,25V,6032 927814 C31,C36,C38, 927814 C47-50,C66 927814 C5,C33,C65 CAP,TA,1.5UF,+-20%,50V,6032...
Page 393 List of Replaceable Parts Parts List Table 6-3. A2 Front Panel PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator IC,CMOS,DUAL D F/F,+EDG TRG,SOIC 782995 IC,TTL,HEX INVERTER,W/OPEN COLL,SOIC 741249 U14-23 IC,BIMOS,DISPLAY DRIVER,80V,PLCC 741231 IC,CMOS,PLD,PROGRAMD,5700A-90724,PLCC 837369 VR3,VR4 ZENER,UNCOMP,6.2V,5%,60.5MA,1.5W,SMB 886700 ZENER,UNCOMP,5.1V,5%,20MA,0.2W,SOT-23...
Page 394 5700A/5720A Series II Calibrator Service Manual 5700A-1602 57001602.EPS Figure 6-5. A2 Front Panel PCA 6-16...
Page 395 List of Replaceable Parts Parts List Table 6-4. A3 Analog Motherboard PCA Reference Fluke Stock Description Tot Qty Notes Designator CAP,POLYES,0.1UF,+-10%,50V 649913 CAP,CER,1000PF,+-20%,50V,X7R 697458 CAP,TA,1UF,+-20%,35V 697417 CAP,TA,4.7UF,+-20%,25V 807644 CAP,POLYES,0.47UF,+-10%,50V 697409 CR1,CR2 DIODE,SI,BV=75V,IO=150MA,500MW 203323 H1,H2 SCREW,PH,P,LOCK,STL,6-32,.250 152140 H3-5 CABLE ACCESS,TIE,4.00L,.10W,.75 DIA...
Page 396 5700A/5720A Series II Calibrator Service Manual 5700A-1601 57001601.EPS Figure 6-6. A3 Analog Motherboard PCA 6-18...
Page 397 List of Replaceable Parts Parts List Table 6-5. A4 Digital Motherboard PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C4 CAP,TA,10UF,+-20%,35V 816512 CAP,CER,1000PF,+-20%,50V,X7R 697458 CAP,POLYES,0.1UF,+-10%,50V 649913 CAP,POLYES,0.1UF,+-20%,250VAC 542233 CAP,CER,6800PF,+-5%,100V,C0G 816710 CR3,CR4 DIODE,SI,100 PIV,1.0 AMP 698555 FUSE,.25X1.25,3A,250V,SLOW 109280 H8-14 CABLE ACCESS,TIE,4.00L,.10W,.75 DIA...
Page 398 5700A/5720A Series II Calibrator Service Manual 5700A-1605 57001605.EPS Figure 6-7. A4 Digital Motherboard PCA 6-20...
Page 399 List of Replaceable Parts Parts List Table 6-6. A5 Wideband Output PCA, Option -03 Reference Fluke Stock Description Tot Qty Notes Designator CAP,CER,4.7PF,+-0.25PF,50V,C0G 721837 CAP,CER,22PF,+-2%,50V,C0G 714832 CAP,POLYES,0.047UF,+-10%,50V 820548 C4,C11-13,C66 CAP,CER,100PF,+-5%,50V,C0G 831495 CAP,CER,470PF,+-10%,50V,C0G 733071 C6,C52,C53,C79 CAP,POLYES,0.033UF,+-10%,50V 715276 CAP,POLYES,0.22UF,+-5%,50V 747519 C7,C10,C15,C23, CAP,POLYES,0.47UF,+-10%,50V...
Page 400 5700A/5720A Series II Calibrator Service Manual Table 6-6. A5 Wideband Output PCA, Option -03 (cont) Reference Fluke Stock Description Tot Qty Notes Designator TRANSISTOR,SI,N-JFET,TO-92 816314 Q2,Q03 TRANSISTOR,SI,N-DMOS FET,TO-72 394122 Q4-6 TRANSISTOR,SI,NPN,20V,500MW,MACRO-T 659417 Q7,Q8 PNP,2N5583 ,TRANSISTOR,SI,PNP,30V,5W,TO-39 800201 Q9,Q10 TRANSISTOR,SI,NPN,ST1020,60V,500MA,1GHZ,3W,TO-39 1590835 Q11-13 1575948 TRANSISTOR,SI,PNP,ST2525A,60V,500MA,1.3GHZ,5W,TO-39...
Page 401 List of Replaceable Parts Parts List Table 6-6. A5 Wideband Output PCA, Option -03 (cont) Reference Fluke Stock Description Tot Qty Notes Designator R69,R70 RES,MF,249,+-1%,0.5W,100PPM 241281 R72,R73,R80-83 RES,MF,909,+-1%,0.5W,100PPM 178053 RES,CF,20K,+-5%,0.25W 441477 RES,MF,10K,+-1%,0.125W,100PPM 168260 R78,R79,R86-89 RES,MF,12.7,+-1%,0.125W,100PPM 441766 R92-95 RES,MF,75,+-1%,0.125W,100PPM 306027 R96-99 RES,MF,187,+-0.1%,0.5W,25PPM...
Page 402 5700A/5720A Series II Calibrator Service Manual 5700A-1611 57001611.EPS Figure 6-8. A5 Wideband Output PCA, Option -03 6-24...
Page 403 List of Replaceable Parts Parts List Table 6-7. A6 Wideband Ocillator PCA, Option -03 Reference Fluke Stock Description Tot Qty Notes Designator C1-8,C49-51 CAP,TA,4.7UF,+-20%,25V 807644 C9,C10 CAP,CER,2700PF,+-5%,50V,C0G 832303 CAP,CER,15PF,+-20%,50V,C0G 697524 C12,C15,C16, CAP,POLYES,0.1UF,+-10%,50V 649913 C18-25,C29-33, 649913 C35-48,C52, 649913 C57,C58,C60, 649913 C61,C101,C103,...
Page 404 5700A/5720A Series II Calibrator Service Manual Table 6-7. A6 Wideband Ocillator PCA, Option -03 (cont) Reference Fluke Stock Description Tot Qty Notes Designator L403 INDUCTOR,12UH,+-5%,47MHZ,SHLD 820720 L501 INDUCTOR,220UH,+-5%,9.4MHZ,SHLD 147835 L502,L504 INDUCTOR,15UH,+-5%,41MHZ,SHLD 806513 SHIELD, WIDEBAND OSCILLATOR, FRONT 775478 SHIELD, WIDEBAND OSCILLATOR, REAR...
Page 405 List of Replaceable Parts Parts List Table 6-7. A6 Wideband Ocillator PCA, Option -03 (cont) Reference Fluke Stock Description Tot Qty Notes Designator R58,R112,R212, RES,MF,110,+-1%,0.125W,100PPM 820571 R312,R412,R512 820571 RES,MF,14.3K,+-1%,0.125W,100PPM 721803 RES,MF,2.49K,+-1%,0.125W,100PPM 810523 R62,R64,R65,R69 RES,CC,680,+-5%,0.5W 687803 RES,CF,200,+-5%,0.25W 810390 RES,MF,1.62K,+-1%,0.125W,100PPM 772004 RES,MF,75,+-1%,0.125W,100PPM...
Page 406 5700A/5720A Series II Calibrator Service Manual 5700A-1610 57001610.EPS Figure 6-9. A6 Wideband Oscillator PCA, Option -03 6-28...
Page 407 List of Replaceable Parts Parts List Table 6-8. A7 Current/High-Res Oscillator PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C71 CAP,CER,0.22UF,+80-20%,50V,Z5U 649939 C2,C3,C18-20, CAP,POLYES,0.1UF,+-10%,50V 649913 C29,C32-35,C47, 649913 C48,C50,C51, 649913 C55,C56 649913 C4,C5 CAP,CER,100PF,+-2%,100V,C0G 812115 C6,C7,C21-24, CAP,TA,4.7UF,+-20%,25V 807644 C37,C38,C40, 807644...
Page 408 5700A/5720A Series II Calibrator Service Manual Table 6-8. A7 Current/High-Res Oscillator PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator Q2,Q5,Q16,Q18 TRANSISTOR,SI,NPN,SMALL SIGNAL 698225 Q3,Q4,Q19 TRANSISTOR,SI,PNP,40V,0.35W,TO-92 698233 Q6,Q7 TRANSISTOR,SI,BV=80V,10W,TO-20 495689 Q8,Q9 TRANSISTOR,SI,BV=80V,10W,TO-20 535468 Q10,Q11 TRANSISTOR,SI,BV=45V,27W,TO-22 325753 Q12,Q13 TRANSISTOR,SI,BV=55V,30W,TO-22 325761...
Page 409 List of Replaceable Parts Parts List Table 6-8. A7 Current/High-Res Oscillator PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator TP1-5,TP7-13, JUMPER,WIRE,NONINSUL,0.200CTR 816090 TP16-20 816090 U2,U3 IC,OP AMP,PRECISION,LOW NOISE 782920 U4,U22 IC,OP AMP,OPA 132 1779200 U5,U18 IC,CMOS,QUAD BILATERAL SWITCH...
Page 410 5700A/5720A Series II Calibrator Service Manual 5700A-1621 57001621.EPS Figure 6-10. A7 Current/HIgh-Res Oscillator PCA 6-32...
Page 411 List of Replaceable Parts Parts List Table 6-9. A8 Switch Matrix PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C3,C18 CAP,CER,470PF,+-10%,50V,C0G 733071 C2,C5 CAP,CER,33PF,+-5%,50V,C0G 714543 CAP,CER,0.01UF,+80-20%,50V,Z5V 697284 C6-9,C12 C13, CAP,POLYES,0.22UF,+-5%,50V 747519 C15,C16 C21, 747519 C25-27 747519 C10,C29 CAP,CER,100PF,+-20%,50V,C0G 721605...
Page 412 5700A/5720A Series II Calibrator Service Manual Table 6-9. A8 Switch Matrix PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator R27,R28 RES,CF,620,+-5%,0.25W 810408 R29,R30 RES,MF,14.3,+-1%,0.125W,100PPM 831396 RES,MF,10,+-1%,0.125W,100PPM 820399 R36,R37 RES,MF,4.99K,+-1%,0.125W,100PPM 721548 RESISTOR A52R,RES,MF,46.4,+-1%,0.125W,100PPM 686995 R41,R42 RES,CF,20,+-5%,0.25W 810382 RES,MF,150,+-1%,0.125W,100PPM 822171...
Page 413 List of Replaceable Parts Parts List 5700A-1622 57001622.EPS Figure 6-11. A8 Switch Matrix PCA 6-35...
Page 414 5700A/5720A Series II Calibrator Service Manual Table 6-10. A9 Ohms Cal PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C28,C29 C55 CAP,POLYES,0.1UF,+-10%,50V 649913 C2,C3,C32,C35 CAP,CER,1000PF,+-20%,100V,X7R 816181 C4,C5,C8,C10, CAP,POLYES,0.22UF,+-5%,50V 747519 C14,C15,C31, 747519 C37-43 C45 747519 CAP,CER,470PF,+-10%,50V,C0G 733071 C7,C9,C22 C23 CAP,TA,2.2UF,+-10%,35V...
Page 415 List of Replaceable Parts Parts List Table 6-10. A9 Ohms Cal PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator TP1,TP2,TP5-20 JUMPER,WIRE,NONINSUL,0.200CTR 816090 U1-3 IC,OP AMP,LO-OFFSET VOLTAGE,LO-NOISE 605980 IC,OP AMP,PRECISION,LOW NOISE 782920 IC,OP AMP,GEN PURPOSE,COMPEMSATED 402750 IC,BIPOLAR,REG PULSE WIDTH MODULATOR...
Page 416 5700A/5720A Series II Calibrator Service Manual 5700A-1631 57001631.EPS Figure 6-12. A9 Ohms Cal PCA 6-38...
Page 417 List of Replaceable Parts Parts List Table 6-11. A10 Ohms Main PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C2,C7 C10- CAP,POLYES,0.22UF,+-5%,50V 747519 13,C16 747519 C3,C4 CAP,TA,10UF,+-20%,35V 816512 CAP,TA,4.7UF,+-20%,25V 807644 H3-6 RIVET,S-TUB,OVAL,AL,.087,.343 838458 H7,H8 SCREW,PH,P,LOCK,STL,6-32,.250 152140 K1-4,K7,K9,K10, RELAY,ARMATURE,2 FORM C,5V,LATCH...
Page 418 5700A/5720A Series II Calibrator Service Manual 5700A-1630 57001630.EPS Figure 6-13. A10 Ohms Main PCA 6-40...
Page 419 List of Replaceable Parts Parts List Table 6-12. A11 DAC PCA Reference Description Fluke Stock Notes Designator DAC FILTER SIP PCA 761395 DAC BUFFERED REFERENCE SIP PCA 764639 C1,C2,C4-8,C10, CAP,CER,0.22UF,+80-20%,50V,Y5V 740597 C11,C13-18, C21, 740597 C23-26, C41, C46- 740597 49,C53-56, 740597...
Page 420 5700A/5720A Series II Calibrator Service Manual Table 6-12. A11 DAC PCA (cont) Reference Description Fluke Stock Notes Designator MP31 MOLDED COVER, REF. HYBRID 797746 P401,P402 CONN,DIN41612,TYPE C,RT ANG,64 PIN 807800 TRANSISTOR,SI,BV=60V,65W,TO-220 386128 Q2,Q3 TRANSISTOR,SI,BV=40V,40W,TO-220 369660 Q4-7,Q11,Q22, TRANSISTOR,SI,N-DMOS PWR FET,T0-92 782565...
Page 421 List of Replaceable Parts Parts List Table 6-12. A11 DAC PCA (cont) Reference Description Fluke Tot Qty Notes Designator Stock No RES,MF,40K,+-0.1%,0.125W,100PPM 821702 RES,MF,18.12K,+-0.1%,0.125W,50PPM 734020 RES,CF,200,+-5%,0.25W 810390 RES,CERM,470K,+-5%,.125W,200PPM 746792 R79-81 RES,CERM,100K,+-1%,.125W,100PPM 769802 R82,R115,R116 RES,CERM,10K,+-5%,.125W,200PPM 746610 R86,R87,R100 RES,CERM,330,+-5%,.125W,200PPM 746370 RES,MF,50K,+-0.1%,0.25W,25PPM 810580 RES,MF,4.12K,+-1%,0.125W,100PPM...
Page 422 5700A/5720A Series II Calibrator Service Manual Table 6-12. A11 DAC PCA (cont) Fluke Description Reference Stock Notes Designator VR13 ZENER 5243 SMR,ZENER,UNCOMP,13V,5%,9.5MA,0.2W,SOT- 642477 VR18,VR22 ZENER 5245 SMR,ZENER,UNCOMP,15V,5%,8.5MA,0.2W,SOT- 837187 VR25 ZENER,UNCOMP,3.3V,10%,20.0MA,0.4W 309799 VR26 ZENER,UNCOMP,3.3V,5%,20MA,0.2W 807008 VR27 ZENER,UNCOMP,7.5V,5%,20MA,0.2W 837138 VR28 ZENER,UNCOMP,8.2V,5%,20MA,0.2W 837146 VR29 ZENER,COMP,6.4V,2%,2PPM,1MA...
Page 423 List of Replaceable Parts Parts List 5700A-1640 57001640.EPS Figure 6-14. A11 DAC PCA 6-45...
Page 424 5700A/5720A Series II Calibrator Service Manual Table 6-13. A11A1 DAC Filter SIP PCA Reference Fluke Stock Description Tot Qty Notes Designator C1-6 CAP,POLYES,0.33UF,+-20%,50V 853903 C10,C11 CAP,POLYPR,1UF,+-5%,50V,HERMETIC 783811 C12,C13 CAP,CER,0.22UF,+80-20%,50V,Y5V,1206 740597 CAP,CER,100PF,+-10%,50V,C0G,1206 740571 P21,P22 HEADER,2 ROW,.100CTR,RT ANG,6 PIN 912217 R1,R2 RES,CERM,11K,+-5%,.125W,250PPM...
Page 425 List of Replaceable Parts Parts List 5700A-1643 57001643.EPS Figure 6-15. A11A1 DAC Filter SIP PCA 6-47...
Page 426 5700A/5720A Series II Calibrator Service Manual Table 6-14. A11A2 DAC Buffered Reference SIP PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C5 CAP,CER,10PF,+-10%,100V,C0G,1206 806943 C2,C3 CAP,CER,0.22UF,+80-20%,50V,Y5V 740597 C4,C6 CAP,CER,1000PF,+-10%,50V,C0G,1206 747378 HEADER,2 ROW,.100CTR,RT ANG,10 PIN 658112 HEADER,2 ROW,.100CTR,RT ANG,8 PIN...
Page 427 List of Replaceable Parts Parts List 5700A-1644 57001644.EPS Figure 6-16. A11A2 DAC Buffered Reference SIP PCA 6-49...
Page 428 5700A/5720A Series II Calibrator Service Manual Table 6-15. A12 Oscillator Control PCA Reference Fluke Stock Description Tot Qty Notes Designator C1-4,C12 C14, CAP,TA,4.7UF,+-20%,25V 807644 C16,C18 C48 807644 C8,C10 CAP,AL,2.2UF,+-20%,50V 769687 CAP,CER,10PF,+-10%,3000V,C0G 817049 C22,C25 CAP,TA,330UF,+-20%,3V 385963 C23,C24 C36- CAP,POLYES,0.22UF,+-5%,50V 747519 38,C44-47 C49,...
Page 429 List of Replaceable Parts Parts List Table 6-15. A12 Oscillator Control PCA (cont) Fluke Reference Description Stock Tot Qty Notes Designator RES,MF,143K,+-1%,0.125W,100PPM 291336 R4,R12 RES,CF,3K,+-5%,0.25W 441527 R5,R13,R25 R48, RES,CF,1K,+-5%,0.25W 343426 R52,R53 R68, R69 343426 343426 RES,CF,750,+-5%,0.25W 810374 RES,CF,200,+-5%,0.25W 810390 R8-10 RES,MF,113K,+-1%,0.125W,100PPM...
Page 430 5700A/5720A Series II Calibrator Service Manual Table 6-15. A12 Oscillator Control PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator IC,VOLT REG,FIXED,+5 VOLTS,1.5 AMPS 428847 VR1,VR2 ZENER,UNCOMP,10.0V,5%,12.5MA,0.4W 246611 ZENER,UNCOMP,5.1V,5%,20.0MA,0.4W 159798 ZENER,UNCOMP,6.8V,2%,175.0MA,5.0W 325845 VR5,VR6 ZENER,UNCOMP,6.8V,5%,37.0MA,1.0W 454595 VR7,VR8 ZENER,UNCOMP,5.1V,5%,20.0MA,0.5W 853700 RNET,CERM,SIP,5700 LO V AMP GAIN...
Page 431 List of Replaceable Parts Parts List 5700A-1650 57001650.EPS Figure 6-17. A12 Oscillator Control PCA 6-53...
Page 432 5700A/5720A Series II Calibrator Service Manual Table 6-16. A13 Oscillator Output PCA Reference Fluke Stock Description Tot Qty Notes Designator C2-4,C16, C20, CAP,POLYES,0.22UF,+-5%,50V 747519 C23 C26-28,C32, 747519 C33,C46,C47, 747519 C51,C52,C54, 747519 C55,C68-71 C88- 747519 92,C102-104, 747519 C110,C111, 747519 C113,C114 747519...
Page 433 List of Replaceable Parts Parts List Table 6-16. A13 Oscillator Output PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator MP13-15 SPACER,.375 RND,SOLUBLE,.10THK 837823 P511,P512 CONN,DIN41612,TYPE C,RT ANG,64 PIN 807800 TRANSISTOR,SI,N-JFET,TO-92 832162 TRANSISTOR,SI,N-DMOS FET,TO-72 394122 TRANSISTOR,SI,NPN,SM SIGNAL,HI 272930 TRANSISTOR,SI,NPN,SMALL SIGNAL...
Page 434 5700A/5720A Series II Calibrator Service Manual Table 6-16. A13 Oscillator Output PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator RES NET HYBRID, TESTED 793885 U12,U32,U33 IC,CMOS,OCTL D F/F W/3-STATE,+EDG TRG 585364 U15,U16,U19 IC,BPLR,FOUR-QUADRANT MULT,16 PIN DIP 343335 U17,U27...
Page 435 List of Replaceable Parts Parts List 5700A-1651 57001651.EPS Figure 6-18. A13 Oscillator Output PCA 6-57...
Page 436 5700A/5720A Series II Calibrator Service Manual Table 6-17. A13A1 Oscillator Wideband SMD PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C3,C4,C6-8, CAP,CER,0.22UF,+80-20%,50V,Y5V 740597 C12,C13 740597 CAP,CER,100PF,+-10%,50V,C0G,1206 740571 CAP,CER,10PF,+-10%,100V,C0G,1206 806943 CAP,CER,470PF,+-10%,50V,C0G,1206 747360 CAP,CER,1000PF,+-10%,50V,C0G,1206 747378 CAP,CER,0.01UF,+-10%,50V,X7R,1206 747261 CR4-6,CR9,C10 DIODE,SI,BV=70V,IO=50MA,DUAL,SOT-23 742320 P1,P2 HEADER,2 ROW,.100CTR,RT ANG,1206...
Page 437 List of Replaceable Parts Parts List 5700A-1652 57001652.EPS Figure 6-19. A13A1 Oscillator Wideband SMD PCA 6-59...
Page 438 5700A/5720A Series II Calibrator Service Manual Table 6-18. A14 High Voltage Control PCA Reference Fluke Stock Description Tot Qty Notes Designator CAP,POLYES,0.72UF,+-20%,1300V 853929 CAP,POLYES,0.1UF,+-20%,1400V 821512 C3,C4 CAP,AL,470UF,+-20%,16V,SOLV PROOF 772855 CAP,POLYES,1UF,+-10%,50V 733089 C6,C7 CAP,TA,10UF,+-20%,35V 816512 C8,C9 CAP,AL,10UF,+-20%,63V,SOLV PROOF 816843 C10,C20,C24-32 CAP,POLYES,0.1UF,+-10%,50V...
Page 439 List of Replaceable Parts Parts List Table 6-18. A14 High Voltage Control PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator RES,MF,20.5K,+-1%,0.125W,100PPM 655233 R30-32 RES,MF,18.2K,+-1%,0.125W,100PPM 756429 R35-39,R50,R52 RES,MF,196K,+-1%,0.125W,100PPM 769984 R40,R41 RES,MF,464K,+-1%,0.125W,100PPM 772020 RES,CF,1.5K,+-5%,0.25W 810432 RES,MF,301K,+-1%,0.125W,100PPM 655274 RES,CF,2K,+-5%,0.25W 810457 R57,R58 RES,CF,750,+-5%,0.25W...
Page 440 5700A/5720A Series II Calibrator Service Manual 5700A-1661 57001661.EPS Figure 6-20. A14 High Voltage Control PCA 6-62...
Page 441 List of Replaceable Parts Parts List Table 6-19. A15 High Voltage/High Current PCA Reference Fluke Stock Description Tot Qty Notes Designator C2,C29,C42 CAP,POLYES,0.01UF,+-10%,50V 715037 CAP,POLYPR,0.022UF,+-5%,1500V 806968 C5,C15-17,C20, CAP,POLYES,0.1UF,+-10%,50V 649913 C21 C23-28,C32 649913 C33,C35,C38,C40 649913 CAP,POLYES,0.047UF,+-10%,50V 820548 CAP,CER,180PF,+-2%,50V,C0G 820522 CAP,CER,680PF,+-5%,50V,C0G 743351...
Page 442 5700A/5720A Series II Calibrator Service Manual Table 6-19. A15 High Voltage/High Current PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator R1,R72 RES,CF,1K,+-5%,0.25W 343426 R2,R15,R39 RES,CF,100K,+-5%,0.25W 348920 R4,R11,R51 R53, RES,CF,100,+-5%,0.25W 348771 R61-64,R74 348771 RES,CF,1.5K,+-5%,0.25W 810432 R6,R9 RES,CF,1M,+-5%,0.25W 348987 RES,CF,51K+-5%,0.25W...
Page 443 List of Replaceable Parts Parts List 5700A-1660 57001660.EPS Figure 6-21. A15 High Voltage/High Current PCA 6-65...
Page 444 5700A/5720A Series II Calibrator Service Manual Table 6-20. A16 Power Amplifier PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C2 CAP,CER,10PF,+-10%,3000V,C0G 817049 CAP,MICA,560PF,+-5%,500V 170431 C4,C28 CAP,CER,0.02UF,+-20%,500V,Z5U 407403 C5,C75 CAP,POLYES,0.047UF,+-10%,50V 820548 C6,C23,C63 CAP,CER,22PF 817049 C7,C24,C43 CAP,CER,1000PF,+-20%,50V,X7R 697458 C8,C13,C16,C20, CAP,POLYES,0.22UF,+-5%,50V 747519...
Page 445 List of Replaceable Parts Parts List Table 6-20. A16 Power Amplifier PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator MP7-8 HEAT DIS,PRESS ON,TO-5 418384 MP20-23 INSUL PT,TRANSISTOR MOUNT,DAP,TO-5 152207 MP41,MP42, SCREW,PH,P,LOCK,STL,6-32,.250 152140 MP45-47 152140 MP43,MP44 EJECTOR,PWB,NYLON 494724 MP49...
Page 446 5700A/5720A Series II Calibrator Service Manual Table 6-20. A16 Power Amplifier PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator R28,R29,R34, RES,MF,499K,+-1%,0.125W,100PPM 714980 714980 RES,CF,330,+-5%,0.25W 830596 RES,CF,100K,+-5%,0.25W 658963 R35,R74,R139 RES,CF,20,+-5%,0.25W 810382 R36,R141,R151, RES,CF,47,+-5%,0.25W 822189 R152 822189 RES,CF,12K,+-5%,0.25W 757799 R38,R118 RES,CF,47K,+-5%,0.25W...
Page 447 List of Replaceable Parts Parts List 5700A-7670 57001670.EPS Figure 6-22. A16 Power Amplifier PCA 6-69...
Page 448 5700A/5720A Series II Calibrator Service Manual Table 6-21. A16A1 Power Amplifier Digital Control SIP PCA Reference Fluke Stock Description Tot Qty Notes Designator CAP,AL,15UF,+-20%,35V 614024 C53,C56 CAP,CER,33PF,+-5%,50V,C0G 714543 CAP,CER,470PF,+-10%,50V,C0G 733071 C55,C57 CAP,POLYES,0.22UF,+-5%,50V 747519 CHOKE,6TURN 320911 HEADER,2 ROW,.100CTR,RT ANG,10 PIN 658112 P1,P2 HEADER,2 ROW,.100CTR,RT ANG,26 PIN...
Page 449 List of Replaceable Parts Parts List 5700A-1671 Figure 6-23. A16A1 Power Amplifier Digital Control SIP PCA 6-71...
Page 450 5700A/5720A Series II Calibrator Service Manual Table 6-22. A17 Regulator/Guard Crossing PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C2,C4,C6, CAP,AL,10UF,+-20%,50V,SOLV PROOF 799437 C7,C9 C11,C12, 799437 C14-16,C19-23, 799437 C27,C28 799437 C3,C10,C18,C25 CAP,CER,0.05UF,+-20%,100V,Z5V 149161 C5,C24,C29, CAP,AL,22UF,+-20%,35V,SOLV PROOF 851766 C102 851766...
Page 451 List of Replaceable Parts Parts List Table 6-22. A17 Regulator/Guard Crossing PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator RES,CF,1.8K,+-5%,0.25W 441444 RES,CF,150,+-5%,0.25W 343442 RES,CF,100,+-5%,0.25W 348771 R60,R61 THERMISTOR,DISC,POS,100,+-20%,25C 851303 SW51 SWITCH,PUSHBUTTON,SPST,MOMENTARY 782656 RF TRANSFORMER, 8 MHZ 813477 TP1,TP4,TP6, JUMPER,WIRE,NONINSUL,0.200CTR...
Page 452 5700A/5720A Series II Calibrator Service Manual 5700A-1680 57001680.EPS Figure 6-24. A17 Regulator/Guard Crossing PCA 6-74...
Page 453 List of Replaceable Parts Parts List Table 6-23. A18 Filter/PA Supply PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C10,C17 CAP,POLYES,0.22UF,+-5%,50V 747519 C2,C3 CAP,AL,6800UF,+-20%.25V 782466 C4,C6 CAP,AL,1000UF,+-20%,50V,SOLV PROOF 782391 C5,C19 CAP,AL,2200UF,+-20%,25V,SOLV PROOF 782383 C7-9,C18 CAP,AL,330UF,+-20%,100V,SOLV PROOF 816785 CAP,AL,220UF,+-20%,25V,SOLV PROOF...
Page 454 5700A/5720A Series II Calibrator Service Manual Table 6-23. A18 Filter/PA Supply PCA (cont) Reference Fluke Description Tot Qty Notes Designator Stock Q201,Q202 TRANSISTOR,SI,N-MOS,40W,500V,T0-220 782540 Q203,Q206 PNP,2N6520 R05A,TRANSISTOR,SI,PNP,350V,625MW,TO-92 602961 Q204,Q209, Q210, TRANSISTOR,SI,P-MOS,500V,TO-92 782508 Q212 782508 Q205,Q207, Q208, TRANSISTOR,SI,N-DMOS,500V,TO-92 782490 Q213 782490 Q211,Q214 TRANSISTOR,SI,NPN,350V,0.625MW,TO-92...
Page 455 List of Replaceable Parts Parts List Table 6-23. A18 Filter/PA Supply PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator VR211,VR217, ZENER,UNCOMP,140.0V,5%,1.8MA,1.0W 340703 VR227,VR231 340703 VR212,VR216, ZENER,UNCOMP,180V,2%,0.68MA,0.4W 816348 VR226,VR232 816348 VR214,VR230, ZENER,UNCOMP,56V,5%,2.2MA,0.4W 832568 VR246,VR247 832568 VR215,VR219, ZENER,UNCOMP,200.0V,5%,5.0MA,5.0W 386839 VR225,VR229...
Page 456 5700A/5720A Series II Calibrator Service Manual 5700A-7690 57001690.EPS Figure 6-25. A18 Filter/PA Supply PCA 6-78...
Page 457 List of Replaceable Parts Parts List Table 6-24. A19 Digital Power Supply PCA Reference Fluke Stock Description Tot Qty Notes Designator CAP,AL,470UF,+-20%,160V 816835 CAP,AL,10UF,+-20%,160V,SOLV PROOF 817064 CAP,AL,330UF,+-20%,100V,SOLV PROOF 816785 C4,C9 CAP,AL,10UF,+-20%,63V,SOLV PROOF 816843 C5,C11 CAP,CER,0.10UF,+-20%,50V,X7R 853650 CAP,AL,10000UF,+-20%,25V 816819 CAP,AL,6800UF,+-20%.25V 782466 CAP,AL,2.2UF,+-20%,50V,SOLV PROOF...
Page 458 5700A/5720A Series II Calibrator Service Manual Table 6-24. A19 Digital Power Supply PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator R3,R12 RES,CF,100K,+-5%,0.25W 348920 RES,CC,4.7K,+-5%,0.25W 348821 RES,CF,12,+-5%,0.25W 442178 RES,CC,10K,+-10%,2W 641123 RES,CC,2,+-5%,0.5W 641057 RES,CF,120K,+-5%,0.25W 441386 R9,R11 RES,CF,33K,+-5%,0.25W 348888 RES,CF,51K,+-5%,0.25W 376434 RES,CC,10K,+-5%,0.25W...
Page 459 List of Replaceable Parts Parts List 5700A-1604 57001604.EPS Figure 6-26. A19 Digital Power Supply PCA 6-81...
Page 460 5700A/5720A Series II Calibrator Service Manual Table 6-25. A20 CPU PCA Part Ref Des Description Note Number CAPACITOR SMR,CAP,TA,220UF,+-20%,10V,7343H 106021 C2-4,C6-7 CAPACITOR SMR,CAP,CER,0.1UF,+-10%,50V,X7R,0805 690500 C14-16 C18, C101-111, C113, C115, C116, C119- 120, C125- 133, C142- 143, C152 CAPACITOR SMR,CAP,TA,15UF,+-20%,35V,7343 690252 C8-11 CAPACITOR SMR,CAP,CER,22PF,+-1%,50V,C0G,0805...
Page 461 List of Replaceable Parts Parts List Table 6-26. A20 CPU PCA (cont) Part Ref Des Description Note Number IC,MEMORY,SRAM,7C1021,1MB,64KX16,5V,15NS,TSOP44,TAPE 1609432 U25, U27-29 CMOS 74HCT244 SMR,IC,CMOS,OCTL LINE DRVR,SOIC 742593 U26, U30 CMOS 74HCT245 SMR,IC,CMOS,OCTAL BUS TRANSCEIVER,SOIC 742577 CMOS 68C681 SM,IC,CMOS,DUAL CHANNEL UART,PLCC 866785 IC, LOGIC, DS75451, 5.0V, SERIES DUAL PERIPHERAL DRIVERS, SOIC8, 1589055...
Page 462 5700A/5720A Series II Calibrator Service Manual 57001606.EPS Figure 6-27. A20 CPU PCA 6-84...
Page 463 List of Replaceable Parts Parts List Table 6-27. A21 Rear Panel PCA Reference Fluke Stock Description Tot Qty Notes Designator C1,C3,C5 CAP,CER,330PF,+-5%,50V,C0G 697441 C4,C21,C22,C24- CAP,POLYES,0.1UF,+-10%,50V 649913 32,C34,C36,C37, 649913 C40-45,C48,C49 649913 C6,C7 CAP,CER,0.22UF,+80-20%,50V,Z5U 649939 CAP,CER,4700PF,+-20%,100V,C0G 743427 CAP,CER,470PF,+-10%,50V,C0G 733071 C10,C70 CAP,TA,68UF,+-20%,15V 193615...
Page 464 5700A/5720A Series II Calibrator Service Manual Table 6-27. A21 Rear Panel PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator IC,OP AMP,OPA132 1779200 IC,CMOS,PROGRMBL PERIPHERAL INTERFACE 780650 U16,U17 IC,BIMOS,8 CHNL HI-VOLT DRVR W/LATCH 782912 IC,COMPARATOR,HI-SPEED,14 PIN 647115 VR1,VR2 ZENER,UNCOMP,3.3V,10%,20.0MA,0.4W 309799 ZENER,UNCOMP,4.7V,10%,20.0MA,0.4W...
Page 465 List of Replaceable Parts Parts List 5700A-1609 57001609.EPS Figure 6-28. A21 Rear Panel PCA 6-87...
Page 466 5700A/5720A Series II Calibrator Service Manual 6-88...
Page 467: Figure Title Page
Chapter 7 Schematic Diagrams Figure Title Page 7-1. A1 Keyboard Assembly................7-3 7-2. A2 Front Panel PCA ................7-5 7-3. A3 Analog Motherboard PCA ..............7-10 7-4. A4 Digital Motherboard PCA..............7-15 7-5. A5 Wideband Output PCA (Option -03) ..........7-19 7-6.
Page 468 5700A/5720A Series II Calibrator Service Manual...
Page 469 Schematic Diagrams Figure 7-1. A1 Keyboard PCA...
Page 470 5700A/5720A Series II Service Manual Figure 7-1. A1 Keyboard PCA (cont)
Page 471 Schematic Diagrams Figure 7-2. A2 Front Panel (PCA)
Page 472 5700A/5720A Series II Service Manual Figure 7-2. A2 Front Panel PCA (cont)
Page 473 Schematic Diagrams Figure 7-2. A2 Front Panel PCA (cont)
Page 474 5700A/5720A Series II Service Manual Figure 7-2. A2 Front Panel PCA (cont)
Page 475 Schematic Diagrams Figure 7-2. A2 Front Panel PCA (cont)
Page 476 5700A/5720A Series II Service Manual Figure 7-3. A3 Analog Motherboard PCA 7-10...
Page 477 Schematic Diagrams Figure 7-23. A3 Analog Motherboard PCA (cont) 7-11...
Page 478 5700A/5720A Series II Service Manual Figure 7-3. A3 Analog Motherboard PCA (cont) 7-12...
Page 479 Schematic Diagrams Figure 7-3. A3 Analog Motherboard PCA (cont) 7-13...
Page 480 5700A/5720A Series II Service Manual Figure 7-3. A3 Analog Motherboard PCA (cont) 7-14...
Page 481 Schematic Diagrams 5700A-1605 Figure 7-4. A4 Digital Motherboard PCA 7-15...
Page 482 5700A/5720A Series II Service Manual Figure 7-4. A4 Digital Motherboard PCA (cont) 7-16...
Page 483 Schematic Diagrams Figure 7-4. A4 Digital Motherboard PCA (cont) 7-17...
Page 484 5700A/5720A Series II Service Manual Figure 7-4. A4 Digital Motherboard PCA (cont) 7-18...
Page 485 Schematic Diagrams 5700A-7611 Figure 7-5. A5 Wideband Output PCA (Option -03) 7-19...
Page 486 5700A/5720A Series II Service Manual 5700A-1011 1 of 3 Figure 7-5. A5 Wideband Output PCA (Option -03) (cont) 7-20...
Page 487 Schematic Diagrams 5700A-1011 2 of 3 Figure 7-5. A5 Wideband Output PCA (Option -03) (cont) 7-21...
Page 488 5700A/5720A Series II Service Manual 5700A-1011 3 of 3 Figure 7-5. A5 Wideband Output PCA (Option -03) (cont) 7-22...
Page 489 Schematic Diagrams 5700A-7610 Figure 7-6. A6 Wideband Oscillator PCA (Option -03) 7-23...
Page 490 5700A/5720A Series II Service Manual 5700A-1010 1 of 3 Figure 7-6. A6 Wideband Output PCA (Option -03) 7-24...
Page 491 Schematic Diagrams 5700A-1010 2 of 3 Figure 7-6. A6 Wideband Oscillator PCA (Option -03) (cont) 7-25...
Page 492 5700A/5720A Series II Service Manual 5700A-1010 3 of 3 Figure 7-6. A6 Wideband Oscillator PCA (Option -03) (cont) 7-26...
Page 493 Schematic Diagrams 5700A-7621 Figure 7-7. A7 Current/High-Resolution Oscillator PCA 7-27...
Page 494 5700A/5720A Series II Service Manual 5700A-1021 1 of 4 Figure 7-7. A7 Current/High-Resolution Oscillator PCA (cont) 7-28...
Page 495 Schematic Diagrams 5700A-1021 2 of 4 Figure 7-7. A7 Current/High-Resolution Oscillator PCA (cont) 7-29...
Page 496 5700A/5720A Series II Service Manual 5700A-1021 3 of 4 Figure 7-7. A7 Current/High-Resolution Oscillator PCA (cont) 7-30...
Page 497 Schematic Diagrams 5700A-1021 4 of 4 Figure 7-7. A7 Current/High-Resolution Oscillator PCA (cont) 7-31...
Page 498 5700A/5720A Series II Service Manual 5700A-7620 Figure 7-8. A8 Switch Matrix PCA 7-32...
Page 499 Schematic Diagrams 5700A-1020 1 of 5 Figure 7-8. A8 Swith Matrix PCA (cont) 7-33...
Page 500 5700A/5720A Series II Service Manual 5700A-1020 2 of 5 Figure 7-8. A8 Switch Matrix PCA (cont) 7-34...
Page 501 Schematic Diagrams 5700A-1020 3 of 5 Figure 7-8. A8 Swith Matrix PCA (cont) 7-35...
Page 502 5700A/5720A Series II Service Manual 5700A-1020 4 of 5 Figure 7-8. A8 Switch Matrix PCA (cont) 7-36...
Page 503 Schematic Diagrams 5700A-1020 5 of 5 Figure 7-8. A8 Swith Matrix PCA (cont) 7-37...
Page 504 5700A/5720A Series II Service Manual 5700A-7631 Figure 7-9. A9 Ohms Cal PCA 7-38...
Page 505 Schematic Diagrams 5700A-1031 1 of 4 Figure 7-9. A9 Ohms Cal PCA (cont) 7-39...
Page 506 5700A/5720A Series II Service Manual 5700A-1031 2 of 4 Figure 7-9. A9 Ohms Cal PCA (cont) 7-40...
Page 507 Schematic Diagrams 5700A-1031 3 of 4 Figure 7-9. A9 Ohms Cal PCA (cont) 7-41...
Page 508 5700A/5720A Series II Service Manual 5700A-1031 4 of 4 Figure 7-9. A9 Ohms Cal PCA (cont) 7-42...
Page 509 Schematic Diagrams 5700A-1630 Figure 7-10. A10 Ohms Main PCA 7-43...
Page 510 5700A/5720A Series II Service Manual Figure 7-10. A10 Ohms Main PCA (cont) 7-44...
Page 511 Schematic Diagrams Figure 7-10. A10 Ohms Main PCA 7-45...
Page 512 5700A/5720A Series II Service Manual Figure 7-10. A10 Ohms Main PCA (cont) 7-46...
Page 513 Schematic Diagrams Figure 7-10. A10 Ohms Main PCA 7-47...
Page 514 5700A/5720A Series II Service Manual 5700A-7640 Figure 7-11. A11 DAC PCA 7-48...
Page 515 Schematic Diagrams 5700A-1040 1 of 6 Figure 7-11. A11 DAC PCA (cont) 7-49...
Page 516 5700A/5720A Series II Service Manual 5700A-1040 2 of 6 Figure 7-11. A11 DAC PCA (cont) 7-50...
Page 517 Schematic Diagrams 5700A-1040 3 of 6 Figure 7-11. A11 DAC PCA (cont) 7-51...
Page 518 5700A/5720A Series II Service Manual 5700A-1040 4 of 6 Figure 7-11. A11 DAC PCA (cont) 7-52...
Page 519 Schematic Diagrams 5700A-1040 5 of 6 Figure 7-11. A11 DAC PCA (cont) 7-53...
Page 520 5700A/5720A Series II Service Manual 5700A-1040 6 of 6 Figure 7-11. A11 DAC PCA (cont) 7-54...
Page 521 Schematic Diagrams Figure 7-12. A11A1 DAC Filter SIP PCA 7-55...
Page 522 5700A/5720A Series II Service Manual Figure 7-13. A1142 DAC Buffered Reference SIP PCA 7-56...
Page 523 Schematic Diagrams 5700A-7650 Figure 7-14. A12 Oscillator Control PCA 7-57...
Page 524 5700A/5720A Series II Service Manual DG211 DG211 DG211 DG211 DG211 3. ALL GND CONNECTIONS DENOTED WITH A 1 ARE BUSSED AND CONNECTED TO GND3 AT ONE POINT. 4. C5 AND C55 ARE NOT INSTALLED. Figure 7-14. A12 Oscillator Control PCA (cont) 7-58...
Page 525 Schematic Diagrams Figure 7-14. A12 Oscillator Control PCA (cont) 7-59...
Page 526 5700A/5720A Series II Service Manual Figure 7-14. A12 Oscillator Control PCA (cont) 7-60...
Page 527 Schematic Diagrams 5700A-7651 Figure 7-15. A13 Oscillator Output PCA 7-61...
Page 528 5700A/5720A Series II Service Manual 5700A-1051 1 of 3 Figure 7-15. A13 Oscillator Output PCA (cont) 7-62...
Page 529 Schematic Diagrams 5700A-1051 2 of 3 Figure 7-15. A13 Oscillator Output PCA (cont) 7-63...
Page 530 5700A/5720A Series II Service Manual 5700A-1051 3 of 3 Figure 7-15. A13 Oscillator Output PCA (cont) 7-64...
Page 531 Schematic Diagrams 5700A-1652 Figure 7-16. A13A1 Oscillator Wideband SMD PCA 7-65...
Page 532 5700A/5720A Series II Service Manual Figure 7-16. A13A1 Oscillator Wideband SMD PCA (cont) 7-66...
Page 533 Schematic Diagrams 5700A-1661 Figure 7-17. A14 High Voltage Control PCA 7-67...
Page 534 5700A/5720A Series II Service Manual Figure 7-17. A14 High Voltage Control PCA (cont) 7-68...
Page 535 Schematic Diagrams Figure 7-17. A14 High Voltage Control PCA (cont) 7-69...
Page 536 5700A/5720A Series II Service Manual Figure 7-17. A14 High Voltage Control PCA (cont) 7-70...
Page 537 Schematic Diagrams Figure 7-17. A14 High Voltage Control PCA (cont) 7-71...
Page 538 5700A/5720A Series II Service Manual 5700A-1660 Figure 7-18. A15 High Voltage/ High Current PCA 7-72...
Page 539 Schematic Diagrams Figure 7-18. A15 High Voltage/High Current PCA (cont) 7-73...
Page 540 5700A/5720A Series II Service Manual Figure 7-18. A15 High Voltage/High Current PCA (cont) 7-74...
Page 541 Schematic Diagrams 5700A-7670 Figure 7-19. A16 Power Amplifier PCA 7-75...
Page 542 5700A/5720A Series II Service Manual 5700A-1070 1 of 3 Figure 7-19. A16 Power Amplifier PCA (cont) 7-76...
Page 543 Schematic Diagrams 5700A-1070 2 of 3 Figure 7-19. A16 Power Amplifier PCA (cont) 7-77...
Page 544 5700A/5720A Series II Service Manual 5700A-1070 3 of 3 Figure 7-19. A16 Power Amplifier PCA (cont) 7-78...
Page 545 Schematic Diagrams 5700A-1671 Figure 7-20. A16A1 Power Amplifier Digitial Control SIP PCA 7-79...
Page 546 5700A/5720A Series II Service Manual Figure 7-20. A161A1 Power Amplifier Digital Control SIP PCA (cont) 7-80...
Page 547 Schematic Diagrams 5700A-7680 Figure 7-21. A17 Regulator/Guard Crossing PCA 7-81...
Page 548 5700A/5720A Series II Service Manual 5700A-1080 1 of 2 Figure 7-21. A17 Regulator/Guard Crossing PCA (cont) 7-82...
Page 549 Schematic Diagrams 5700A-1080 2 of 2 Figure 7-21. A17 Regulator/Guard Crossing PCA (cont) 7-83...
Page 550 5700A/5720A Series II Service Manual 5700A-7690 Figure 7-22. A18 Filter/PA Supply PCA 7-84...
Page 551 Schematic Diagrams Figure 7-22. A18 Filter/PA Supply PCA (cont) 7-85...
Page 552 5700A/5720A Series II Service Manual S201 J203 2N652Q 2N652Q J204 REPLACE S201 WITH J203 AND 204 AS SHOWN. Figure 7-22. A18 Filter/PA Supply PCA (cont) 7-86...
Page 553 Schematic Diagrams 5700A-1604 Figure 7-23. A19 Digital Power Supply PCA 7-87...
Page 554 5700A/5720A Series II Service Manual Figure 7-23. A19 Digital Power Supply PCA (cont) 7-88...
Page 555 Schematic Diagrams Figure 7-24. A20 CPU PCA 7-89...
Page 556 5700A/5720A Series II Service Manual Figure 7-24. A20 CPU PCA (cont) 7-90...
Page 557 Schematic Diagrams Figure 7-24. A20 CPU PCA (cont) 7-91...
Page 558 5700A/5720A Series II Service Manual Figure 7-24. A20 CPU PCA (cont) 7-92...
Page 559 Schematic Diagrams Figure 7-24. A20 CPU PCA (cont) 7-93...
Page 560 5700A/5720A Series II Service Manual Figure 7-24. A20 CPU PCA (cont) 7-94...
Page 561 Schematic Diagrams Figure 7-25. A21 Real Panel PCA 7-95...
Page 562 5700A/5720A Series II Service Manual Figure 7-25. A21 Rear Panel PCA (cont) 7-96...
Page 563 Schematic Diagrams Figure 7-25. A21 Rear Panel PCA (cont) 7-97...
Page 564 5700A/5720A Series II Service Manual Figure 7-25. A21 Rear Panel PCA (cont) 7-98...
Page 565 Schematic Diagrams Figure 7-25. A21 Rear Panel PCA (cont) 7-99...
Page 566 5700A/5720A Series II Service Manual Figure 7-25. A21 Rear Panel PCA (cont) 7-100...
Page 567 Schematic Diagrams Figure 7-26. Hybrids 7-101...
Page 568 5700A/5720A Series II Service Manual Figure 7-26. Hybrids (cont) 7-102...
Page 569 Schematic Diagrams Figure 7-26. Hybrids (cont) 7-103...
Page 570 5700A/5720A Series II Service Manual Figure 7-26. Hybrids (cont) 7-104...
Page 571 Schematic Diagrams Figure 7-26. Hybrids (cont) 7-105...
Page 572 5700A/5720A Series II Service Manual 7-106...
Page 573 Index range, 3-14 Wideband AC Module (Option 5700A-03), —A— 3-17 Ac, 2-11, 2-12, 2-122, 3-33, 3-36, 3-45, 3-46 Calibration Check, 3-20 AC Voltage Frequency Accuracy Test, 3-31 Cleaning, 4-3, 4-4 Ac/dc, 2-77, 2-78, 2-80 air filter, 3-5 Access, 4-4 exterior, 3-6 Adc, 2-69, 2-70, 2-71, 5-65 Clearing, 4-11 Address, 2-24...
Page 574 Fiber-optic, 2-42 Manuals, additional, 1-5 Filter, 2-18 Minimum, 3-46 Filter, cleaning, 3-5 Filter/pa, 2-33, 2-35 —N— Fluke, 2-5 Fr1, 2-34, 2-40 Negative, 2-68 Fr2, 2-35, 2-40 Front, 2-28, 4-6 —O— Front/rear, 2-18, 4-9 Ohms, 2-13, 2-109, 2-111, 2-112, 2-115, 5-57...
Page 575 (continued) Index Rom, 2-25 —W— Rs-232c, 2-132 Warmup, 3-23 Watchdog, 2-24 —S— Waveform, 5-42, 5-44, 5-45, 5-46, 5-48, 5-51, 5-53, 5-54, 5-56, 5-58, 5-59, 5-60, 5-62, 5-63, Selection, 2-109 Self-calibration, 2-69 5-64, 5-65, 5-68, 5-73, 5-77 Sense, 2-67, 2-74 Wideband, 2-12, 2-135, 2-137, 2-138, 2-139, 2-140, 2-141, 2-142, 3-38, 3-39, 3-40, 3-41, Service Centers, 1-8 3-45...
Page 576 5700A/5720A Series II Service Manual...

This manual is also suitable for:

5720a series

Save PDF