Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
Page 2 Service Manual TDS 520B, 540B, 620B, TDS 644B, TDS 680B, TDS 684B, TDS 724A, TDS 744A, & TDS 784A Digitizing Oscilloscope 070-9386-03 Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so.
Page 3 Copyright Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Printed in the U.S.A. Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000...
Page 4 Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located.
Page 6 Table of Contents General Safety Summary ........Service Safety Summary .
Page 7 Table of Contents Performance Tests ......... . 4–15 Prerequisites .
Page 8: Table Of Contents
Table of Contents List of Figures Figure 2–1: Map of Display Functions ......2–8 Figure 4–1: Map of Display Functions .
Page 9 Table of Contents Figure 4–30: Triggered Signal Range Test – 75 mV ....4–73 Figure 4–31: 60 Hz Rejection Test Hookup ..... . 4–74 Figure 4–32: 60 Hz Rejection Test Setup Signal .
Page 10 Table of Contents Figure 6–12: Remove Circuit Board Assembly From Oscilloscope 6–31 Figure 6–13: Remove Circuit Board From Assembly ... . . 6–32 Figure 6–14: Circuit Board Installed ......6–34 Figure 6–15: Circuit Board Removal .
Page 11 Table of Contents Figure 10–4: Cables, Bottom View ......10–13 Figure 10–5: Cables, Top View .
Page 12 Table of Contents List of Tables Table 1–1: Key Features of the TDS 500B, 600B and 700A Oscilloscopes ......... . . 1–1 Table 1–2: Record Length vs.
Page 13 Table of Contents Table 6–1: Relative Susceptibility to Static-Discharge Damage ..6–2 Table 6–2: External Inspection Check List ..... 6–5 Table 6–3: Internal Inspection Check List .
Page 14 General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use the product only as specified. Only qualified personnel should perform service procedures. Injury Precautions Use Proper Power Cord To avoid fire hazard, use only the power cord specified for this product.
Page 15 General Safety Summary Use Proper Voltage Before applying power, ensure that the line selector is in the proper position for Setting the power source being used. Provide Proper Ventilation To prevent product overheating, provide proper ventilation. Do Not Operate With If you suspect there is damage to this product, have it inspected by qualified Suspected Failures service personnel.
Page 16 General Safety Summary Symbols on the Product The following symbols may appear on the product: Double DANGER Protective Ground ATTENTION Insulated High Voltage (Earth) Terminal Refer to Manual Certifications and Compliances CSA Certified Power CSA Certification includes the products and power cords appropriate for use in Cords the North America power network.
Page 17 General Safety Summary TDS 500B, 600B and TDS 700A Service Manual...
Page 18 Service Safety Summary Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service procedures. Do Not Service Alone Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present.
Page 19 Service Safety Summary TDS 500B, 600B and TDS 700A Service Manual...
Page 20 Preface This preface contains information needed to properly use this manual to service the TDS 500B, 600B and 700A Digitizing Oscilloscopes, as well as general information critical to safe and effective servicing of this oscilloscope. Manual Structure This manual is divided into sections, such as Specification and Theory of Operation.
Page 21 Diagrams contains a block diagram and an interconnection diagram useful for isolating failed modules. Mechanical Parts List includes a table of all replaceable modules, their descriptions, and their Tektronix part numbers. Manual Conventions This manual uses certain conventions which you should become familiar with before doing service.
Page 22 The TDS 500B, 600B and 700A Digitizing Oscilloscopes come with the following manuals: TDS 520B, TDS 540B, TDS 620B, TDS 644B, TDS 680B, TDS 684B, TDS 724A, TDS 744A, & 784A User Manual (Tektronix part number 070-9383-XX) contains a tutorial to quickly show you how to operate the TDS 500B, 600B and 700A Digitizing Oscilloscopes and an in depth discussion of how to more completely use their features.
Page 23 Preface xviii TDS 500B, 600B and TDS 700A Service Manual...
Page 24 Installation Procedures, also found in Section 6. Service Offerings Tektronix provides service to cover repair under warranty as well as other services that may provide a cost-effective answer to your service needs. Whether providing warranty repair service or any of the other services listed below, Tektronix service technicians, trained on Tektronix products, are best equipped to service your TDS 500B, 600B and 700A Digitizing Oscilloscopes.
Page 25 Module Repair and Return. This service returns to you within 10 days the same module that you shipped to Tektronix. The module shipped is repaired, tested, and returned to you from the Beaverton, Oregon service center. It is not updated to match current modules of the same type.
Page 26 Introduction Before You Begin This manual is for servicing the TDS 500B, 600B and 700A Digitizing Oscilloscopes. To prevent injury to yourself or damage to the oscilloscope, do the following tasks before you attempt service: Be sure you are a qualified service person. Read the Safety Summary found at the beginning of this manual.
Page 27 Introduction xxii TDS 500B, 600B and TDS 700A Service Manual...
Page 29: Table 1-1: Key Features Of The Tds 500B, 600B And 700A
Opt. 1G, TDS 540B, 744A: simultaneously 1 GS/s Analog bandwidth 1 GHz on TDS 680B, 684B, and 784A 500 MHz on TDS 520B, 540B, 620B, 644B, 724A and 744A Channels Four, each with 8-bit resolution Record lengths, maximum 15,000 samples...
Page 30 Specifications User Interface Use a combination of front-panel buttons, knobs, and on-screen menus to control the many functions of the oscilloscope. The front-panel controls are grouped according to function: vertical, horizontal, trigger, and special. Set a function you adjust often, such as vertical positioning or the time base setting, directly by its own front-panel knob.
Page 31: Table 1-2: Record Length Vs. Divisions Per Record, Samples Per
2,000 divs 10 divs (TDS 500B/700A opt. 1M only) 130000 2,600 divs 13 divs (TDS 500B/700A opt. 1M only) (for TDS 520B & 724A, 1 or 2 channels only) 250000 5,000 divs 10 divs (TDS 520B/724A opt. 1M only, 1 channel, TDS 540B, 744A, 784A opt.
Page 32 Specifications Both the delayed only display and the intensified zone on the main intensified display may be delayed by time with respect to the main trigger. Both can be set to display immediately after the delay (delayed runs after main mode). The delayed display can also be set to display at the first valid trigger after the delay (delayed-triggerable modes).
Page 33 Specifications Acquisition Control You can specify a mode and manner to acquire and process signals that matches your measurement requirements. Select the mode for interpolation (linear or sin (x)/x). This can increase the apparent sample rate on the waveform when the maximum real-time rate is exceeded.
Page 34 An important component of the multiprocessor architecture of this Digitizing (DSP) Oscilloscope is Tektronix’s proprietary digital signal processor, the DSP. This dedicated processor supports advanced analysis of your waveforms when doing such compute-intensive tasks as interpolation, waveform math, and signal averaging.
Page 35 Specifications measurements in a production or research and development environment that calls for repetitive data taking. Self-compensation and self-diagnostic features built into the Digitizing Oscilloscope to aid in fault detection and servicing are also accessible using commands sent from a GPIB controller. The oscilloscope can also output copies of its display using the hardcopy feature.
Page 36 Specifications 1–8 TDS 500B, 600B and TDS 700A Service Manual...
Page 37: Table 1-3: Nominal Traits - Signal Acquisition System
Description Bandwidth Selections 20 MHz, 250 MHz, and FULL Samplers, Number of TDS 540B, 644B, 684B, 744A, 784A: Four, simultaneous TDS 520B, 620B, 680B, 724A: Two, simultaneous Digitized Bits, Number of 8 bits Input Channels, Number of Four Input Coupling...
Page 38: Table 1-4: Nominal Traits - Time Base System
Record Length Selection 500 samples, 1000 samples, 2500 samples 5000 samples, 15000 samples The TDS 520B and 724A also offer: 50000 samples and, with its option 1M, 75000, 100000, 130000 (1 or 2 channels), or 250000 (1 channel) samples The TDS 540B, 744A, and 784A also offer: 50000 samples and, with its option 1M,...
Page 39: Table 1-5: Nominal Traits - Triggering System
Nominal Traits Table 1–5: Nominal Traits — Triggering System Name Description Range, Delayed Trigger Time Delay 16 ns to 250 s Range, Events Delay TDS 600B; 2 to 10,000,000 TDS 500B/700A: 1 to 10,000,000 Range (Time) for Pulse-Glitch, 1 ns to 1 s Pulse-Width, Time-Qualified Runt, Timeout, or Slew Rate Trigger, Delta Time Setup and Hold for...
Page 40: Table 1-6: Nominal Traits - Display System
Single Graticule: 401 501 pixels, 8 10 divisions, where divisions are 1 cm by 1 cm Waveform Display Levels/Colors TDS 520B, 540B, 620B & 680B: Sixteen levels in infinite-persistence or variable persistence display TDS 644B, 684B, 724A, 744A, 784A: Sixteen colors in infinite-persistence or variable persistence display Table 1–7: Nominal Traits —...
Page 41: Table 1-9: Nominal Traits - Mechanical
Forced-air circulation with no air filter. Clearance is required. Construction Material Chassis parts constructed of aluminum alloy; front panel constructed of plastic laminate; circuit boards constructed of glass laminate. Cabinet is aluminum and is clad in Tektronix Blue vinyl material. Finish Type...
Page 42 Nominal Traits 1–14 TDS 500B, 600B and TDS 700A Service Manual...
Page 43 Warranted Characteristics This section lists the various warranted characteristics that describe the TDS 500B, 600B and 700A Digitizing Oscilloscopes. Electrical and environmental characteristics are included. Warranted characteristics are described in terms of quantifiable performance limits which are warranted. NOTE. In these tables, those warranted characteristics that are checked in the procedure Performance Verification appear in boldface type under the column Name.
Page 44: Table 1-10: Warranted Characteristics - Signal Acquisition
Warranted Characteristics Table 1–10: Warranted Characteristics — Signal Acquisition System Name Description Accuracy, DC Gain TDS 600B: 1.5% for all sensitivities from 2 mV/div to 10 V/div 2.0% at 1 mV/div sensitivity TDS 500B, 700A: 1% for all sensitivities from 1 mV/div to 10 V/div with offset from 0 V to 100V Accuracy, DC Voltage Measurement, Measurement Type...
Page 45: Table 1-11: Warranted Characteristics - Time Base System
Warranted Characteristics Table 1–10: Warranted Characteristics — Signal Acquisition System (Cont.) Name Description Analog Bandwidth, DC-50 Coupled 520B, 540B, 724A, and Bandwidth selection is FULL, Volts/Div 744A Bandwidth 784A Bandwidth TDS 500B/700A 10 mV/div – DC – 500 MHz DC – 1 GHz 1 V/div 5 mV/div –...
Page 46: Table 1-12: Warranted Characteristics - Triggering System
Warranted Characteristics Table 1–12: Warranted Characteristics — Triggering System Name Description Sensitivity, Edge-Type Trigger, Coupling Trigger Source Sensitivity set to “DC” Any Channel TDS 620B & 644B: 0.35 division from DC to 50 MHz, increasing to 1 division at 500 MHz TDS 680B &...
Page 47: Table 1-14: Warranted Characteristics - Environmental
Warranted Characteristics Table 1–13: Warranted Characteristics — Output Ports, Probe Compensator, and Power Requirements (Cont.) Name Description Output Voltage and Frequency, Characteristic Limits Pr be Probe Compensator pe a r Output Voltage 0.5 V (base-top) 1% into a 50 load Frequency 1 kHz 5% Output Voltage, Signal Out (CH 3...
Page 48 Warranted Characteristics Table 1–14: Warranted Characteristics — Environmental (Cont.) Name Description 1, 2 Emissions (TDS 500B/700A) Meets or exceeds the requirements of the following standards: Vfg. 243/1991 Amended per Vfg. 46/1992 FCC Code of Federal Regulations, 47 CFR, Part 15, Subpart B, Class A European Community Requirements EN 55011 Class A Radiated Emissions EN 55011 Class A Conducted Emissions...
Page 49 The GPIB cable connected to the instrument for certain of the emissions tests must be “low EMI” having a high-quality outer shield connected through a low impedance to both connector housings. Acceptable cables are Tektronix part numbers 012-0991-00, -01, -02, and -03. In order to maintain the EMI performance conforming to the above regulations, the following cables, or their equivalent, should be used: a shielded Centronics cable, 3 meters in length, part number 012-1214-00, and a shielded RS-232 cable, 2.7 meters in length, CA part number 0294-9.
Page 50 Warranted Characteristics 1–22 TDS 500B, 600B and TDS 700A Service Manual...
Page 51: Table 1-15: Typical Characteristics - Signal Acquisition System
Typical Characteristics This subsection contains tables that list the various typical characteristics which describe the TDS 500B, 600B and 700A Digitizing Oscilloscopes. Typical characteristics are described in terms of typical or average performance. Typical characteristics are not warranted. Table 1–15: Typical Characteristics — Signal Acquisition System Name Description Analog Bandwidth, DC-50...
Page 52 Typical Characteristics Table 1–15: Typical Characteristics — Signal Acquisition System (Cont.) Name Description Analog Bandwidth, DC-50 Coupled Volts/Div as with P6245 Probe and Bandwidth Read Out on 784A Bandwidth selection is FULL, TDS 784A Screen 10 mV/div – (Not Applicable) 100 V/div 100 mV/div –...
Page 53 Typical Characteristics Table 1–15: Typical Characteristics — Signal Acquisition System (Cont.) Name Description Single Shot or TDS 600B: ( (0.20 sample interval) + (100 ppm | Reading |) + Sample mode (0.05 W (or HiRes mode TDS 600B example: at 5 GS/s, 5 ns/div, measuring a 40 ns wide on the TDS pulse, accuracy = ( 40 ps + 4 ps + 5 ps) = 49 ps.
Page 54 Table 1–15: Typical Characteristics — Signal Acquisition System (Cont.) Name Description Effective Bits Sample Rate Input — TDS 520B, 724A 1 GS/s 10 MS/s & HiRes Frequency The chart on the right gives the typical he ha t o the ight gi es the ty i al 1 MHz –...
Page 55: Table 1-16: Typical Characteristics - Triggering System
Typical Characteristics Table 1–16: Typical Characteristics — Triggering System Name Description Accuracy, Trigger Level or Threshold, Trigger Source Accuracy DC Coupled upled Any Channel ((2% | Setting – Net Offset |) (for signals having rise and fall times + (0.3 div Volts/div Setting ) + Offset 20 ns) Accuracy) Auxiliary...
Page 56 Typical Characteristics Table 1–16: Typical Characteristics — Triggering System (Cont.) Name Description For vertical settings > 10 mV/div and 1 V/div at the BNC input Width, Minimum Pulse and Rearm, for Logic Triggering or Events Delay Minimum Minimum Pulse Minimum Re-Arm Time Between Triggering Type Width...
Page 57 Typical Characteristics Table 1–16: Typical Characteristics — Triggering System (Cont.) Name Description The minimum signal levels required for stable logic or pulse triggering of an acquisition, or for stable counting of a DC-coupled, events-delay signal. Also, see the footnote for Sensitivity, Edge-Type Trigger, DC Coupled in this table. (Stable counting of events is counting that misses no events and produces no extra, phantom events.) The minimum signal levels required for stable runt pulse triggering of an acquisition.
Page 58 Typical Characteristics 1–30 TDS 500B, 600B and TDS 700A Service Manual...
Page 60 Installation Supplying Operating Power NOTE. Read all information and heed all warnings in this subsection before connecting the oscilloscope to a power source. WARNING. AC POWER SOURCE AND CONNECTION. The oscilloscope operates from a single-phase power source. It has a three-wire power cord and two-pole, three-terminal grounding type plug.
Page 61: Table 2-1: Power-Cord Conductor Identification
Installation Table 2–1: Power-Cord Conductor Identification Conductor Color Alternate Color Ungrounded (Line) Brown Black Grounded (Neutral) Light Blue White Grounded (Earthing) Green/Yellow Green Table 2–2: Power Cord Identification Plug Configuration Normal Usage Option Number North America Standard 125 V Europe 230 V United Kingdom 230 V...
Page 62 Installation Memory Backup Power Memory modules with on-board batteries allow the TDS 500B, 600B and 700A Digitizing Oscilloscopes to retain some types of data upon loss of the AC power source. The stored adjustment constants, saved front-panel settings, current front-panel settings (instrument status), and waveforms saved in memory are retained.
Page 63: Table 2-3: Effects Of Corrupted Data
275 pounds and with an inside dimension at least six inches greater than the instrument dimensions. If the instrument is being shipped to a Tektronix Service Center, enclose the following information: the owner’s address, name and phone number of a contact person, type and serial number of the instrument, reason for returning, and a complete description of the service required.
Page 64 Installation Seal the shipping carton with an industrial stapler or strapping tape. Mark the address of the Tektronix Service Center and also your own return address on the shipping carton in two prominent locations. Installed Options Your instrument may be equipped with one or more instrument options. Except for the line-cord options described by Table 2–2 (on page 2–2 of this section),...
Page 65 Installation 2–6 TDS 500B, 600B and TDS 700A Service Manual...
Page 66 Operating Instructions Before doing service, read the following operating instructions. These instruc- tions are at the level appropriate for servicing these Digitizing Oscilloscopes. The User Manual contains more complete operating instructions. Additional instructions are integrated into the service procedures found in later sections of this manual.
Page 67: Figure 2-1: Map Of Display Functions
Operating Instructions Position of waveform General purpose record relative to knob readout the screen and display Brief status information Side menu area. Graticule and waveforms Readouts for measurements Waveform reference move here when symbols shows ground levels CLEAR MENU and waveform sources is pressed.
Page 68 Operating Instructions How to Set Functions Most functions can be set either by using one (or two) front-panel button(s) or knob(s), or by pushing a front-panel button to use a main menu, and then a side-menu button to set the function. The following steps illustrate both procedures.
Page 69 Operating Instructions 2. Select the waveform source(s). Position, scale, and set trigger level for waveform source(s) directly from the front panel. The steps that follow provide examples of possible control selections. a. Input waveforms into these channels (7). Example: CH 1. b.
Page 70 Operating Instructions e. Adjust trigger level (6) to trigger the waveform(s) selected or use these buttons (5) to either set a trigger level at the mid-amplitude level of the selected waveform or to force a single trigger. Example: Push SET LEVEL TO 50%.
Page 71 Operating Instructions e. Select the setting for the function from the side menu (9) using the side-menu buttons (11). Example: Push AC (10). How to Set Complex A few functions require more than just two levels (main and side) of menus to Functions completely specify their settings.
Page 72 Operating Instructions 2. Set up a function using the general purpose knob (20). (The examples of possible menu selections in the substeps that follow assume you have pushed TRIGGER MENU.) a. Pushing some main-menu buttons displays a side menu with labels containing readouts that can be varied.
Page 73 Operating Instructions Gated measurements Number of events Template generation Trigger position Holdoff Offset Variable persistence In all cases, the menus are used to select the function to which the general purpose knob is assigned. The following attributes apply to this knob: Depending on the function it is assigned to control, the general purpose knob may vary numerical readouts, position objects (cursors) on screen, or select between icon-label settings that show up in side-menu labels.
Page 74 Operating Instructions Display and Utility Menus. Using the techniques described for using menus, you can access and change functions in the display menu and utilities menu. In the Display menu, you can set the following functions: Color: waveforms, readouts, graticule Intensity: waveforms, readouts, graticule, etc.
Page 75 Operating Instructions 2–16 TDS 500B, 600B and TDS 700A Service Manual...
Page 77 Theory of Operation This section describes the electrical operation of the TDS 500B, 600B and 700A Digitizing Oscilloscopes using the major circuit blocks or modules. This section has two main parts: Logic Conventions describes how logic functions are discussed and represented in this manual.
Page 78 Theory of Operation selected and the input is overloaded, the processor system switches the input to the 1 M position. Probe Coding Interface. Probe coding interface signals pass through the attenuator portion of the A10 Attenuator/Acquisition to the acquisition system, where they are sensed and controlled.
Page 79 Theory of Operation Front Panel The processor system sends instructions to and receives information from the Front Panel Processor on the A12 Front Panel board. The Front Panel Processor reads the front-panel switches and potentiometers. Any changes in their settings are reported to the processor system.
Page 80 Theory of Operation 3–4 TDS 500B, 600B and TDS 700A Service Manual...
Page 82 If you are not familiar with operating this oscilloscope, read the TDS 520B, 540B, 620B, 644B, 680B, 684B, 724A, 744A, & 784A Reference (070-9382-XX) or the TDS 520B, 540B, 620B, 644B, 680B, 684B, 744A, & 784A User Manual (070-9383-XX). These contain instructions that will acquaint you with the use of the front-panel controls and the menu system.
Page 83 Performance Verification Procedures Conventions Throughout these procedures the following conventions apply: Each test procedure uses the following general format: Title of Test Equipment Required Prerequisites Procedure Each procedure consists of as many steps, substeps, and subparts as required to do the test. Steps, substeps, and subparts are sequenced as follows: 1.
Page 84: Figure 4-1: Map Of Display Functions
Performance Verification Procedures the five buttons to the right of the display. “Pop-up menu” refers to a menu that pops up when a main-menu button is pressed. Position of waveform General purpose record relative to knob readout the screen and display Brief status information Side menu area.
Page 85 Performance Verification Procedures 4–4 TDS 500B, 600B and TDS 700A Service Manual...
Page 86 Brief Procedures The Self Tests use internal routines to confirm basic functionality and proper adjustment. No test equipment is required to do these test procedures. The Functional Tests utilize the probe-compensation output at the front panel as a test-signal source for further verifying that the oscilloscope functions properly. A probe, such as the P6243 or P6245, is required to do these test procedures.
Page 87: Figure 4-2: Verifying Adjustments And Signal-Path Compensation
Brief Procedures e. Confirm the three adjustment sections have passed status: Press SHIFT; then press UTILITY. Highlight Cal in the pop-up menu by repeatedly pressing the main-menu button System. See Figure 4–2. Verify that the word Pass appears in the main menu under the following menu labels: Voltage Reference, Frequency Response, and Pulse Trigger.
Page 88 Brief Procedures 2. Return to regular service: Press CLEAR MENU to exit the system menus. Functional Tests The purpose of these procedures is to confirm that the oscilloscope functions properly. The only equipment required is one of the standard-accessory probes and, to check the file system, a 3.5 inch, 720 K or 1.44 Mbyte floppy disk.
Page 89: Figure 4-3: Universal Test Hookup For Functional Tests - Tds 600B Shown
Brief Procedures Verify All Input Channels Equipment One probe such as the P6243, P6245 or P6139A Required Prerequisites None 1. Install the test hookup and preset the oscilloscope controls: a. Hook up the signal source: Install the probe on CH 1. Connect the probe tip to PROBE COMPENSATION SIGNAL on the front panel;...
Page 90 Press the main-menu button Source. Press the side-menu button that corresponds to the channel selected (Ch2, Ch3, or Ch4. On the TDS 520B, 620B, 680B, and 724A use Ax1 and Ax2 instead of Ch3 and Ch4). c. Set up the selected channel: Set the vertical SCALE to 200 mV.
Page 91 Brief Procedures Sample mode displays an actively acquiring waveform on-screen. (Note that there is noise present on the peaks of the square wave.) Peak Detect mode displays an actively acquiring waveform on-screen with the noise present in Sample mode “peak detected.” Hi Res mode (TDS 500B and 700A only) displays an actively acquiring waveform on-screen with the noise that was present in Sample mode reduced.
Page 92 Brief Procedures a. One period of the square-wave probe-compensation signal is about five horizontal divisions on-screen for the 200 s horizontal scale setting (set in step 1c). b. Rotating the horizontal SCALE knob clockwise expands the waveform on-screen (more horizontal divisions per waveform period), counter- clockwise rotation contracts it, and returning the horizontal scale to 200 s returns the period to about five divisions.
Page 93 Brief Procedures 2. Verify that the main trigger system operates: Confirm that the following statements are true. The trigger level readout for the main trigger system changes with the trigger-LEVEL knob. The trigger-LEVEL knob can trigger and untrigger the square-wave signal as you rotate it.
Page 94 One 720 K or 1.44 Mbyte, 3.5 inch DOS-compatible disk. You can use a disk of your own or you can use the Programming Examples Software 3.5 inch disk (Tektronix part number 063-1134-XX) contained in the TDS Family Programmer Manual (Tektronix part number 070-9556-XX).
Page 95 Brief Procedures e. Save the settings: Press SETUP. Press the main-menu button Save Current Setup; then press the side-menu button To File. Turn the general purpose knob to select the file to save. Choose ). With this choice, you will save a file starting with , then containing 5-numbers, and a extension.
Page 96 Performance Tests This section contains a collection of procedures for checking that the TDS 500B, 600B, and 700A Digitizing Oscilloscopes perform as warranted. The procedures are arranged in four logical groupings: Signal Acquisition System Checks, Time Base System Checks, Triggering System Checks, and Output Ports Checks.
Page 97: Table 4-1: Test Equipment
Wavetek 9100 with options Checking Sample-Rate and to 10 ns; accuracy within 2 ppm 100 and 250 (or, optionally, Delay-time Accuracy Tektronix TG 501A Time Mark Generator 12. Probe, 10X A P6139A, P6243, or P6245 probe Tektronix part number Signal Interconnection P6139A or P6245 13.
Page 98 To make measurements beyond 8 V, use either the P6139A probe (good to 500 V), or refer to the catalog for a recom- mended probe. You can replace items 19, 20, or 21 with a Tektronix SG503 (item 25) or SG504 (item 26) – if available. 4–17...
Page 99 Performance Tests 4–18 TDS 500B, 600B and TDS 700A Service Manual...
Page 100 Performance Tests TDS 600B Test Record Photocopy this and the next three pages and use them to record the performance test results for your TDS 600B. TDS 600B Test Record Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician: TDS 600B Performance Test Minimum...
Page 101 Performance Tests TDS 600B Test Record (Cont.) Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician: TDS 600B Performance Test Minimum Incoming Outgoing Maximum 200 mV Vert scale setting, – 11.786 V __________ __________ – 11.420 V +5 Div position setting, –10 V offset 1 V Vert scale setting, + 17.26 V...
Page 102 Performance Tests TDS 600B Test Record (Cont.) Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician: TDS 600B Performance Test Minimum Incoming Outgoing Maximum Delay Between Channels Delay Between Channels __________ __________ 100 ps Time Base System Long Term Sample Rate/ Delay Time @ 500 ns/10 ms –2.0 Div...
Page 103 Performance Tests TDS 600B Test Record (Cont.) Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician: TDS 600B Performance Test Minimum Incoming Outgoing Maximum CH 3 or AX1 SIGNAL OUTPUT, 1 M Pk-Pk 80 mV __________ __________ Pk-Pk 120 mV CH 3 or AX1 SIGNAL OUTPUT, 50 Pk-Pk 40 mV...
Page 104 Performance Tests TDS 500B/700A Test Record Photocopy this and the next three pages and use them to record the performance test results for your TDS 500B/700A. TDS 500B/700A Test Record Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician: TDS 500B/700A Performance Test Minimum...
Page 105 Performance Tests TDS 500B/700A Test Record (Cont.) Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician: TDS 500B/700A Performance Test Minimum Incoming Outgoing Maximum 200 mV Vert scale setting, – 11.6615 V __________ __________ – 11.5385 V +5 Div position setting, –10 V offset 1 V Vert scale setting, + 17.7785 V...
Page 106 Performance Tests TDS 500B/700A Test Record (Cont.) Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician: TDS 500B/700A Performance Test Minimum Incoming Outgoing Maximum Delay Between Channels Delay Between Channels __________ __________ 50 ps Time Base System Long Term Sample Rate/ Delay Time @ 100 ns/10.0 ms –2.5 Div...
Page 107 Performance Tests TDS 500B/700A Test Record (Cont.) Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician: TDS 500B/700A Performance Test Minimum Incoming Outgoing Maximum CH 3 or AX 1 SIGNAL OUTPUT, 1 M Pk-Pk 88 mV __________ __________ Pk-Pk 132 mV CH 3 or AX 1 SIGNAL OUTPUT, 50...
Page 108 Performance Tests Signal Acquisition System Checks These procedures check those characteristics that relate to the signal-acquisition system and are listed as checked under Warranted Characteristics in Specifica- tions. Check Offset Accuracy Equipment None (Zero Setting) Required Prerequisites The oscilloscope must meet the prerequisites listed on page 4–15 1.
Page 109: Table 4-2: Dc Offset Accuracy (Zero Setting)
Performance Tests b. Set the vertical scale: Set the vertical SCALE to one of the settings listed in Table 4–2 that is not yet checked. (Start with the first setting listed.) Press VERTICAL MENU. Press the main-menu button Fine Scale. Use the keypad to enter the vertical scale.
Page 110: Figure 4-4: Measurement Of Dc Offset Accuracy At Zero Setting
Performance Tests Read the measurement results. Align the active cursor over the waveform. Figure 4–4: Measurement of DC Offset Accuracy at Zero Setting g. Test all channels: Repeat substeps a through f for all input channels. 3. Disconnect the hookup: No hookup was required. Check DC Voltage Measurement Accuracy WARNING.
Page 111: Figure 4-5: Initial Test Hookup
Performance Tests 1. Install the test hookup and preset the instrument controls: a. Hook up the test-signal source: Set the output of a DC calibration generator to 0 volts. Connect the output of a DC calibration generator through a dual-banana connector followed by a 50 precision coaxial cable to one side of a BNC T connector.
Page 112: Table 4-3: Dc Voltage Measurement Accuracy
Performance Tests a. Select an unchecked channel: Press WAVEFORM OFF to remove the channel just confirmed from the display. Press the front-panel button that corresponds to the channel you are to confirm. Set the generator output to 0 V. Move the test hookup to the channel you selected. b.
Page 113: Figure 4-6: Measurement Of Dc Accuracy At Maximum Offset And Position
Performance Tests Use the keypad to set vertical offset to the positive-polarity setting listed in the table for the current vertical scale setting. The baseline level will remain off screen. Set the generator to the level and polarity indicated in the table for the vertical scale, position, and offset settings you have made.
Page 114 Performance Tests Repeat substeps c through f until all vertical scale settings, listed in Table 4–3, are checked for the channel under test. g. Test all channels: Repeat substeps a through f for all four channels. 3. Disconnect the hookup: a.
Page 115: Figure 4-7: Initial Test Hookup
10 MHz or less. See Figure 4–7. For the optional setup using a leveled sine wave generator with a leveling head (item 26) see Figure 4–8 and, if using this optional setup with the example Tektronix SG 504, set the generator output to 6 MHz. Sine Wave Digitizing Oscilloscope...
Page 116: Table 4-4: Analog Bandwidth
Set the vertical scale: Set the vertical SCALE to one of the settings listed in Table 4–4 not yet checked. (Start with the 100 mV setting.) Table 4–4: Analog Bandwidth TDS 680B, TDS 620B TDS 520B, 684B, and and 644B 540B, 724A, Horizontal...
Page 117 Press the front-panel button SET LEVEL TO 50% as necessary to trigger a stable display. At full bandwidth, which for the TDS 680B, TDS 684B, and TDS 784A equals 1 GHz and for the TDS 520B, 540B, 620B, TDS 644B, 724A, and TDS 744A equals 500 MHz frequency, you may also want to make small, manual adjustments to the trigger level.
Page 118: Figure 4-9: Measurement Of Analog Bandwidth
Performance Tests Read results. Set the generator (reference) frequency to the test frequency from Table 4–4. Set the horizontal scale from Table 4–4. Figure 4–9: Measurement of Analog Bandwidth g. Check against limits: CHECK that the Pk-Pk readout on screen is within the limits listed in Table 4–4 for the current vertical scale setting.
Page 119 Performance Tests NOTE. Passing the signal path compensation confirms the signal path for all vertical scale settings for all channels. Passing the internal diagnostics ensures that the factory-set adjustment constants that control the bandwidth for each vertical scale setting have not changed. h.
Page 120: Figure 4-10: Initial Test Hookup
The horizontal SCALE should already be set to 500 ps. On the TDS 784A and TDS 600B, now set it to 200 ps. On the TDS 520B, 540B, 4–39 TDS 500B, 600B and TDS 700A Service Manual...
Page 121 Save Wfm; then press the side-menu button To Ref 2. d. Save CH 3 (AX1 on the TDS 520B, 620B, 680B, and 724A) waveform: Move the coupler from CH 2 to CH 3, so that CH 1 and CH 3 are driven.
Page 122: Figure 4-11: Measurement Of Channel Delay - Tds 684B Shown
Use the cursors to measure the skew from CH1 to CH2, CH1 to CH3, and CH1 to CH4 (on the TDS 520B, 620B, 680B, and 724A use AX1 and AX2 instead of CH3 and CH4). Write down these three numbers in the first measurement column of Table 4–5.
Page 123: Table 4-5: Delay Between Channels Worksheet
Add the first CH1 to CH2 skew measurement to the second CH1 to CH2 skew measurement and divide the result by 2. Use Table 4–5. m. Add the first CH1 to CH3 (AX1 on the TDS 520B, 620B, 680B, and 724A) skew measurement to the second CH1 to CH3 skew measurement and divide the result by 2.
Page 124: Figure 4-12: Initial Test Hookup
Init. c. Modify the initialized front-panel control settings: Set the vertical SCALE to 200 mV (or 500 mV with the optional Tektronix TG 501A Time Mark Generator) Press VERTICAL MENU; then press the main-menu button Coupling. Press the side-menu button to toggle it to the 50 setting.
Page 125 Performance Tests Use the vertical POSITION knob to center the test signal on screen. Set the horizontal SCALE of the Main time base to 1 ms. Press TRIGGER MENU; then press the main-menu button Mode & Holdoff. Press the side-menu button Normal. 2.
Page 126: Figure 4-13: Measurement Of Accuracy - Long-Term And Delay Time
Performance Tests Align the trigger T to the center graticule line. horizontal mode. Check long–term sample Set horizontal scale rates and delay time and delayed time. accuracies against limits. Figure 4–13: Measurement of Accuracy — Long-Term and Delay Time 3. Disconnect the hookup: Disconnect the cable from the generator output at the input connector of CH 1.
Page 127: Figure 4-14: Initial Test Hookup
Performance Tests 1. Install the test hookup and preset the instrument controls: a. Initialize the instrument: Press save/recall SETUP. Press the main-menu button Recall Factory Setup. Press the side-menu button OK Confirm Factory Init. b. Modify the default setup: Press VERTICAL MENU. Press the main-menu button Coupling;...
Page 128: Triggering
Performance Tests b. Set the trigger mode: Press TRIGGER MENU. Now press the main-menu button Mode & Holdoff; then press the side-menu button Normal. c. Set upper and lower limits that ensure triggering: See Figure 4–15. Press the main-menu button Type; then repeatedly press the same button until Pulse is highlighted in the menu that pops up.
Page 129: Figure 4-15: Measurement Of Time Accuracy For Pulse And Glitch
Performance Tests Set upper and lower limits that ensure triggering. Then change limits until triggering stops. Figure 4–15: Measurement of Time Accuracy for Pulse and Glitch Triggering 3. Confirm the trigger system is within time-accuracy limits for pulse-glitch or pulse-width triggering (horizontal scale >1 s): a.
Page 130: Figure 4-16: Initial Test Hookup
Performance Tests CHECK that the Lower Limit readout, after the oscilloscope stops triggering, is within 1.9 s to 2.1 s, inclusive. Enter time on test record. Use the keypad to return the Lower Limit to 500 ns and reestablish triggering. Press the side-menu button Upper Limit;...
Page 131 Performance Tests Connect the output of the DC calibration generator, through a dual-banana connector followed by a 50 precision coaxial cable, to one side of a BNC T connector. Connect the Sense output of the generator, through a second dual-banana connector followed by a 50 precision coaxial cable, to other side of the BNC T connector.
Page 132: Figure 4-17: Measurement Of Trigger-Level Accuracy
Performance Tests c. Read results (Check against limits): See Figure 4–17. CHECK that the Level readout in the main menu is within 9.863 V to 10.137 V, inclusive, for the TDS 600B or is within 9.9393 V to 10.1147 V, inclusive, for the TDS 500B/700A. Enter voltage on test record.
Page 133 Performance Tests Press HORIZONTAL MENU. Press the main-menu button Time Base. Press the side-menu buttons Delayed Only and Delayed Trigger- able. Set D (delayed) horizontal SCALE to 500 s. b. Select the Delayed trigger system: Press SHIFT; then press the front-panel DELAYED TRIG button. Press the main-menu button Level.
Page 134 Performance Tests Sensitivity, Edge Trigger, Equipment One sine wave generator (Item 19 or, optionally, items 25 and 26) Required DC Coupled Two precision 50 coaxial cables (Item 5) One 10X attenuator (Item 1) One BNC T connector (Item 7) One 5X attenuator (Item 2) Prerequisites See page 4–15.
Page 135: Figure 4-18: Initial Test Hookup
Performance Tests Sine Wave To AUX TRIG INPUT Generator on Rear Panel Digitizing Oscilloscope Figure 4–18: Initial Test Hookup 2. Confirm Main and Delayed trigger systems are within sensitivity limits (50 MHz): a. Display the test signal: Set the generator frequency to 50 MHz. Press MEASURE.
Page 136: Figure 4-19: Measurement Of Trigger Sensitivity - 50 Mhz Results
Performance Tests 2 ms/division and faster, TRIG’D will remain constantly lighted. It will flash for slower settings. Press TRIGGER MENU; then press the main-menu button Slope. Press SET LEVEL TO 50%. Adjust the TRIGGER LEVEL knob so that the TRIG’D light is on. Set the level to near the middle of the range where the TRIG’D light is on.
Page 137 Performance Tests Press SHIFT; then press DELAYED TRIG. Press the main-menu button Level. Press the side-menu button SET TO 50%. CHECK that a stable trigger is obtained for the test waveform for both the positive and negative slopes of the waveform. Use the TRIGGER LEVEL knob to stabilize the Main trigger.
Page 138 Performance Tests Leave the Main trigger system triggered on the positive slope of the waveform before proceeding to the next check. Press the main-menu button Source; then press the side-menu button –more– until CH 1 appears. Press CH 1. 4. Confirm that the Main and Delayed trigger systems are within sensitivity limits (full bandwidth, for TDS 680B, 684B, &...
Page 139: Figure 4-20: Initial Test Hookup
Performance Tests Output Signal Checks The procedure that follows checks those characteristics of the output signals that are listed as checked under Warranted Characteristics in Specifications. The oscilloscope outputs these signals at its front and rear panels. Check Outputs — CH 3 Equipment Two 50 precision cables (Item 5)
Page 140 Performance Tests d. Modify the initialized front-panel control settings: Set the horizontal SCALE to 200 s. Press SHIFT; then press ACQUIRE MENU. Press the main-menu button Mode; then press the side-menu button Average. Select 64 averages. Do this with the keypad or the general purpose knob 2.
Page 141: Figure 4-21: Measurement Of Main Trigger Out Limits
CHECK that the Ch2 High readout is 2.5 volts and that the Ch2 Low readout is 0.7 volts. Enter high and low voltages on test record. 3. Confirm CH 3 (Ax1 on TDS 520B, 620B, 680B, and TDS 724A) output is within limits for gain: a. Measure gain:...
Page 142 Push TRIGGER MENU. Press the main-menu button Source. Press the side-menu button Ch3. (Ax1 on TDS 520B, 620B, 680B, and TDS 724A) Set vertical SCALE to 100 mV. Press SET LEVEL TO 50%. Press MEASURE; then press the main-menu button Select Measrmnt for Ch2.
Page 143: Figure 4-22: Initial Test Hookup
Performance Tests Check Probe Equipment One female BNC to clip adapter (Item 3) Required Compensator Output Two dual-banana connectors (Item 6) One BNC T connector (Item 7) Two 50 precision cables (Item 5) One DC calibration generator (Item 9) Prerequisites See page 4–15.
Page 144 Performance Tests c. Modify the initialized front-panel control settings: Set the horizontal SCALE to 200 s. Press SET LEVEL TO 50%. Use the vertical POSITION knob to center the display on screen. Press SHIFT; then press ACQUIRE MENU. Press the main-menu button Mode; then press the side-menu button Average.
Page 145: Figure 4-23: Measurement Of Probe Compensator Frequency
Performance Tests Figure 4–23: Measurement of Probe Compensator Frequency c. Save the probe compensation signal in reference memory: Press SAVE/RECALL WAVEFORM; then press the main-menu button Save Wfm Ch 1. Press the side-menu button To Ref 1 to save the probe compensation signal in reference 1.
Page 146: Figure 4-24: Subsequent Test Hookup
Performance Tests the other side of the BNC T connector. Now connect the BNC T connector to CH 1. See Figure 4–24. Digitizing Oscilloscope DC Calibrator Dual Banana to BNC Adapters BNC T Connector Coaxial Cables Figure 4–24: Subsequent Test Hookup e.
Page 147: Figure 4-25: Measurement Of Probe Compensator Amplitude
Performance Tests Figure 4–25: Measurement of Probe Compensator Amplitude g. Check against limits: Subtract the value just obtained (base level) from that obtained previously (top level). CHECK that the difference obtained is within 495 mV to 505 mV, inclusive. Enter voltage difference on test record. 3.
Page 148 Performance Tests Option 05 Video Trigger Checks Check Video Trigger Equipment PAL signal source (Item 14) Required 60 Hz. sine wave generator (Item 15) Pulse generator (Item 16) Two 75 cables (Item 17) Two 75 terminators (Item 18) One BNC T connector (Item 7) cable (Item 5) terminator (Item 4) Prerequisites...
Page 149: Figure 4-26: Jitter Test Hookup
Performance Tests g. Press the main-menu Bandwidth. h. Select 250 MHz from the side menu. Press the main-menu Fine Scale. Use the keypad to set the fine scale to 282mV (press 282, SHIFT, m, then ENTER). k. Press HORIZONTAL MENU. Press the main-menu Horiz Scale.
Page 150: Figure 4-27: Jitter Test Displayed Waveform - Tds 684B Shown
Performance Tests Figure 4–27: Jitter Test Displayed Waveform – TDS 684B Shown c. Press SHIFT; then press ACQUIRE MENU. d. Press the main-menu Mode. e. Select the side-menu Average. It should be already set to 16. Press the main-menu Create Limit Test Template. g.
Page 151: Figure 4-28: Jitter Test When Completed - Tds 684B Shown
Performance Tests q. Press the main-menu Mode. r. Press the side-menu Envelope. s. Use the keypad to set envelope to use 100 acquisitions (press 100, then ENTER). Press the main-menu Stop After button. u. Press the side-menu Single Acquisition Sequence. v.
Page 152 Performance Tests b. Press WAVEFORM OFF. c. Press HORIZONTAL MENU. d. Use the keypad to set horizontal scale (/div) to 50 s (press 50, SHIFT, , then ENTER). e. Press SHIFT; then press ACQUIRE MENU. Press the main-menu Stop After. g.
Page 153: Figure 4-29: Triggered Signal Range Test - 300 Mv
Performance Tests Positive pulse Negative pulses Figure 4–29: Triggered Signal Range Test – 300 mV n. Use the keypad to set the fine scale to 75 mV (press 75, SHIFT, m, then ENTER). o. CONFIRM that the TRIG’D LED stays lighted and that the waveform on screen is stable.
Page 154 Performance Tests Positive pulse Negative pulses Figure 4–30: Triggered Signal Range Test – 75 mV p. Disconnect all test equipment (TSG121) from the digitizing oscillo- scope. 5. Check 60 Hz Rejection. a. Set up oscilloscope for 60 Hz Rejection Test. Use the keypad to set the Ch1 Fine Scale to 282 mV (press 282, SHIFT m, then ENTER).
Page 155 Performance Tests Digitizing Oscilloscope Signal Generator Output Cable Figure 4–31: 60 Hz Rejection Test Hookup Adjust the signal generator for three vertical divisions of 60 Hz signal. See Figure 4–32. The signal will not be triggered. That is, it will run free. Figure 4–32: 60 Hz Rejection Test Setup Signal c.
Page 156 Performance Tests TSG 121) to a 75 cable and a 75 terminator. Connect both signals to the CH1 input through a BNC T. See Figure 4–33. Press VERTICAL MENU. If needed, press the main-menu Fine Scale. Use the keypad to set fine scale to 500 mV (press 500, SHIFT, m, then ENTER).
Page 157 Performance Tests Figure 4–34: 60 Hz Rejection Test Result – TDS 684B Shown 6. Check Line Count Accuracy. a. Set up oscilloscope for Line Count Accuracy Test. Press WAVEFORM OFF. Press CH1. Press HORIZONTAL MENU. Press the main-menu Record Length. Press the side-menu –more–...
Page 158 Performance Tests PAL Signal Source Digitizing Oscilloscope Output Cable Terminator Figure 4–35: Line Count Accuracy Test Hookup Press the main-menu Trigger Position. Press the side-menu to Set to 50%. Press the main-menu to Horiz Pos. Press the side-menu to Set to 50%. Use the HORIZONTAL POSITION knob to move the falling edge of the sync pulse to two divisions to the left of center screen.
Page 159 Performance Tests Figure 4–36: Line Count Accuracy Test Setup Waveform – TDS 684B Shown Press CURSOR. Press the main-menu Function. Press the side-menu V Bars. Using the General Purpose knob, place the left cursor directly over the trigger ‘T’ icon. Press SELECT.
Page 160: Oscilloscopes
Performance Tests Figure 4–37: Line Count Accuracy Correct Result Waveform Disconnect all test equipment (TSG 121) from the digitizing oscilloscope. Turn off cursors by pressing CURSOR, then the main-menu Function button, and, finally, Off from the side menu. 7. Check the Sync Duty Cycle. a.
Page 161 Performance Tests Press the side-menu Fields. Use the keypad to set the number of fields to 1 (press 1, then ENTER). Press the side-menu Sync Width. Use the keypad to set the width to 400 ns (press 400, SHIFT, n, then ENTER).
Page 162 Performance Tests c. Check Sync Duty Cycle. Connect the pulse generator through a 50 cable and a 50 terminator to the oscilloscope CH1 input. See Figure 4–38. Pulse Generator Digitizing Oscilloscope Output Cable Terminator Figure 4–38: Setup for Sync Duty Cycle Test Turn the pulse generator OUTPUT (VOLTS) control until the signal on the oscilloscope shows a one division negative going pulse.
Page 163 Performance Tests Figure 4–39: Sync Duty Cycle Test: One-Div Neg Pulse Waveform Turn the pulse generator PULSE DURATION variable control to adjust the negative pulse so the oscilloscope’s CH1 – Width measurement displays 400ns +/–10 ns. Turn the HORIZONTAL SCALE knob to set the oscilloscope time base to 5 s/div.
Page 164 Performance Tests Figure 4–40: Sync Duty Cycle Test: Critically Adjusted Pulse Press TRIGGER MENU. Press the main-menu Type pop-up until you select Video. If the TRIG’D LED is not lighted, check that the CH1 – Width and CH1 Period measurements are adjusted correctly. See note above. CONFIRM that the setup is correct and the oscilloscope will trigger.
Page 165 Performance Tests Disconnect the signal source from CH1, wait a few seconds, then reconnect the signal. CONFIRM that the TRIG’D LED is lighted and the waveform is stable. Disconnect all test equipment from the digitizing oscilloscope. Press save/recall SETUP, the main-menu button Recall Factory Setup, and the side-menu OK Confirm Factory Init.
Page 166 Performance Tests Sine Wave Level Digitizing Oscilloscope Generator Meter Input Power Output Splitter Attenuators (if necessary) Power Sensor Figure 4–41: Sine Wave Generator Leveling Equipment Setup 1. Install the test hookup: Connect the equipment as shown in Figure 4–41. 2. Set the Generator: Set the sine wave generator to a reference frequency of 10 MHz.
Page 167 Performance Tests Equipment Sine wave generator (Item 19) Required Level meter and power sensor (Item 20) Two male N to female BNC adapters (Item 23) Two precision coaxial cables (Item 5) Prerequisites See page 4–15 1. Install the test hookup: Connect the equipment as shown in Figure 4–42 (start with the sine wave generator connected to the digitizing oscilloscope).
Page 168 Performance Tests 4. Set the generator to the new frequency and reference level: Change the sine wave generator to the desired new frequency. Input the correction factor for the new frequency into the level meter. Adjust the sine wave generator amplitude until the level meter again reads the value noted in step 3.
Page 169 Performance Tests 4–88 TDS 500B, 600B and TDS 700A Service Manual...
Page 171 Adjustment Procedures This section contains information needed to adjust the TDS 500B, 600B and 700A Digitizing Oscilloscopes. Description The Adjustment Procedures are divided into six subsections: General information about adjusting theTDS 500B, 600B, and 700A Digitizing Ossilloscopes. A list of equipment required to perform the adjustments. The written procedures for installing and using both the TDS 600B Adjustment Software and the TDS 700A Adjustment Software.
Page 172: System
A GPIB board — National Instruments GPIB-PCII, GPIB-PCIIA or GPIB-PCII/IIA. (A PC-GPIB Package that includes the PCII/IIA is available — Tektronix part number S3FG210) Suitable keyboard and monitor. Optional Peripherals Installation of a math coprocessor in your system is strongly recommended to decrease the time required to adjust the oscilloscope.
Page 173: Table 5-1: Calibration Tests
Adjustment Procedures screen. Your role, then, is to provide those test signals and to prompt the computer to continue. Since the display-assembly and P6139A probe adjustment require manual adjustment of circuit components, they are not part of the adjustment software. Written procedures for these adjustments start on page 5–7.
Page 174: Table 5-2: Adjustments Required For Module Replaced
Adjustment Procedures Complete Adjustment, Adjustment After Repair, and Adjustment Dependencies before doing an individual adjustment. Adjustment After Repair After the removal and replacement of a module due to electrical failure, you must either do a complete adjustment or no adjustment at all, depending on the module replaced.
Page 175: Table 5-4: Test Equipment, Fixtures, And Supplies
700A Digitizing Oscilloscopes. Table 5–4: Test Equipment, Fixtures, and Supplies Item Number and Description Minimum Requirements Example Purpose Adapter, BNC-Female-to- Tektronix part number Tektronix part number Probe Adjustment BNC-Female 013-0028-00 013-0028-00 Adapter, Probe Tip to Tektronix part number Tektronix part number...
Page 176 Software-based Adjustments Wave, High-Frequency amplitude from 0.5 V to 4 V Wave Generator with its level- into 50 ; 6 MHz reference; ing head or a Tektronix SG harmonic content: 2 harmonic 5030 Programmable Leveled down –25 dB from fundamental;...
Page 177: Table 5-5: Gpib Board Configuration
Adjustment Procedures Adjustment Instructions The following instructions describe installing the software on your system, setting up the oscilloscope for adjustment, and starting the adjustment of the oscilloscope by the software. Hardware Installation 1. Install the proper GPIB card (see System on page 5–2): Use the manual accompanying your GPIB card to install and configure that card.
Page 178 Adjustment Procedures 2. Install the software to the hard disk: a. Install your working disk in a floppy drive and type install. The software will ask you to specify the hard disk on which to install the adjustment software. It will also prompt you to specify several GPIB-card configura- tion parameters.
Page 179 Adjustment Procedures d. Follow the instructions as prompted on your computer screen. This will include the actions listed in step 5 shown below. 5. Enable the adjustment constants to be written –when prompted on your computer screen in step 4 above: a.
Page 180 Adjustment Procedures CAUTION. Be sure to disable the NVRAM Protection switch as instructed below to protect the adjustment constants against alteration. a. Locate the two small access holes on the right side of the oscilloscope cabinet near the front. (See Figure 5–1.) b.
Page 181 Adjustment Procedures Figure 5–2: Hookup for Probe Compensation b. Initialize the oscilloscope: Press save/recall SETUP. Press the main-menu button Recall Factory Setup. Press the side-menu button OK Confirm Factory Init. c. Modify the initialized front-panel control settings: Press AUTOSET. Set the horizontal SCALE to 250 s. Press SET LEVEL TO 50% as required to trigger the signal.
Page 182 Adjustment Procedures Figure 5–3: Performing Probe Compensation Probe compensated correctly Probe overcompensated Probe undercompensated Figure 5–4: Proper and Improper Probe Compensation 3. Disconnect the hookup: Disconnect the probe from the probe compensator terminals; leave probe installed on CH 1 and leave the oscilloscope control setup as is for doing the next part of probe adjustment.
Page 183 Adjustment Procedures Measure Probe Bandwidth Equipment One high-frequency sine wave generator with its leveling head Required (Item 14) One BNC-female-to-female BNC adapter (Item 1) One BNC-to-probe tip adapter (Item 2) One P6139A 10X probe (Item 17) 1. Install the test hookup and preset the oscilloscope controls: a.
Page 184 Adjustment Procedures High Frequency Sine Wave Digitizing Oscilloscope Generator Output BNC-Female-to- Female BNC BNC-to Probe Leveling Head Adapter Tip Adapter Figure 5–6: Initial Test Hookup c. Initialize the oscilloscope: Press save/recall SETUP. Press the main-menu button Recall Factory Setup. Press the side-menu button OK Confirm Factory Init. d.
Page 185 Adjustment Procedures a. Display and measure the test signal: Monitor the CH 1 Pk-Pk readout while you set the output of the generator for a 3.0 V (6 division), 6 MHz reference signal. Set the horizontal SCALE to 1 ns and set the frequency of the generator to 500 MHz.
Page 186 Adjustment Procedures a. Access Inner Probe Tip and Adjustment Ports: The probe tip should be exposed from the procedure Measure Probe Bandwidth. If not, follow the instructions in Figure 5–5 to expose the probe tip. Follow the instructions in Figure 5–7 to remove the probe body covers.
Page 187 Adjustment Procedures Calibration Digitizing Oscilloscope Generator Output 10X Attenuator Tunnel Diode Pulser Precision Cable Figure 5–8: Initial Test Hookup c. Initialize the oscilloscope: Press save/recall SETUP. Press the main-menu button Recall Factory Setup. Press the side-menu button OK Confirm Factory Init. d.
Page 188 Adjustment Procedures Press SHIFT; then press ACQUIRE MENU. Press the main-menu button Mode. Then press the side-menu button Average 16. Push SET LEVEL TO 50% as required to trigger the signal. Advance the horizontal SCALE to 5 ns. Press HORIZONTAL MENU. Press the main-menu button Trigger Position;...
Page 189 Adjustment Procedures Not Used LF Comp Figure 5–9: Locations of P6139A Probe Adjustments See Figure 5–10 to see what areas on the front corner that the various adjustments affect. d. Recheck Probe Bandwidth: Redo the procedure Adjust Probe — High Frequency Response to check if probe now meets its bandwidth requirement.
Page 190 Adjustment Procedures 20 ns 10 ns 5 ns Adjust R1 for best overall match. Adjust R2 and C1 for best match between front corners. Repeat the first two steps as needed due to interaction between adjustments. Figure 5–10: Adjustments versus Front-Corner Response 3.
Page 191 Adjustment Procedures Display Assembly Adjustment STOP. It is not necessary to do this procedure to perform a complete adjustment. Only use this procedure to adjust the display assembly if it has been repaired or if brightness and contrast have become unsatisfactory. Brightness, and Contrast Adjustment (TDS 500B, 620B and...
Page 192 Adjustment Procedures b. Make the brightness adjustment Locate R569 (BRIGHTNESS). It is one of the two adjustments on the left side of the instrument located just ahead of the fan. It is the adjustment nearest the fan. Observe the luminance patches using a 6X magnifier. Adjust R569 (BRIGHTNESS) until the background raster lines in the 5% luminance patch (see Figure 5–11) just disappear, while the lines in the 10% luminance patch are just visible, when both are...
Page 193 Adjustment Procedures Press the main-menu button EXECUTE; then press the side-menu button Ok Confirm Run Test. b. Make the contrast adjustment: Locate R572. It is one of two adjustments on the left side of the instrument located just ahead of the fan. It is the adjustment nearest the front of the oscilloscope.
Page 194 Adjustment Procedures Rotation, Brightness, and Contrast Adjustment (TDS 644B, 684B, and Equipment One 6X magnifier (Item 15) 700A – Color Only) Required One J16 Photometer with a J6503 Luminance Probe (Item 16) 1. Access the inside of the oscilloscope: See Removal and Installation Procedures in Section 6 to remove the cabinet.
Page 195 Adjustment Procedures Locate R403 (BRIGHTNESS). It is one of the adjustments on the left side of the instrument located just ahead of the fan. It is the fourth adjustment from the fan. Observe the luminance patches using a 6X magnifier. Adjust R403 (BRIGHTNESS) until the background raster lines in the 5% luminance patch (see Figure 5–11) just disappear, while the lines in the 10% luminance patch are just visible, when both are...
Page 196 Adjustment Procedures b. Power off the oscilloscope. c. See Removal and Installation Procedures in Section 6 to reinstall the cabinet and other modules removed in step 1. 5–26 TDS 500B, 600B and TDS 700A Service Manual...
Page 198 Maintenance This section contains the information needed to do periodic and corrective maintenance on the TDS 500B, 600B and 700A Digitizing Oscilloscopes. The following subsections are included: Preparation — Introduction plus general information on preventing damage to internal modules when doing maintenance. Inspection and Cleaning —...
Page 199 Maintenance Preparation Preventing ESD CAUTION. Static discharge can damage any semiconductor component in this oscilloscope. Precautions. When performing any service which requires internal access to the oscilloscope, adhere to the following precautions to avoid damaging internal modules and their components due to electrostatic discharge (ESD). 1.
Page 200 Maintenance Table 6–1: Relative Susceptibility to Static-Discharge Damage (Cont.) Relative Susceptibility Semiconductor Classes Levels Schottky TTL High-frequency bipolar transistors JFET Linear microcircuits Low-power Schottky TTL TTL (least sensitive) Voltage equivalent for levels (voltage discharged from a 100 pF capacitor through resistance of 100 ohms) 1 = 100 to 500 V 6 = 600 to 800 V...
Page 201 Use a 75% isopropyl alcohol solution as a cleaner and rinse with deionized water. Before using any other type of cleaner, consult your Tektronix Service Center or representative. Inspection — Exterior. Inspect the outside of the oscilloscope for damage, wear, and missing parts, using Table 6–2 as a guide.
Page 202 Maintenance Table 6–2: External Inspection Check List Item Inspect For Repair Action Cabinet, front panel, Cracks, scratches, deformations, Repair or replace defective and cover damaged hardware or gaskets. module. Front-panel knobs Missing, damaged, or loose Repair or replace missing or knobs.
Page 203 Maintenance CAUTION. To prevent damage from electrical arcing, ensure that circuit boards and components are dry before applying power to the oscilloscope. Table 6–3: Internal Inspection Check List Item Inspect For Repair Action Circuit boards Loose, broken, or corroded Remove failed module and solder connections.
Page 204 Maintenance STOP. If, after doing steps 1 and 2, a module is clean upon inspection, skip the remaining steps. 3. If steps 1 and 2 do not remove all the dust or dirt, the oscilloscope may be spray washed using a solution of 75% isopropyl alcohol by doing steps 4 through 8.
Page 205 Maintenance 6–8 TDS 500B, 600B and TDS 700A Service Manual...
Page 206 Removal and Installation Procedures This subsection contains procedures for removal and installation of all mechani- cal and electrical modules. Any electrical or mechanical module, assembly, or part listed in Section 10 of this manual is a module. Preparation — Please Read WARNING.
Page 207 Removal and Installation Procedures General Instructions STOP. READ THESE GENERAL INSTRUCTIONS BEFORE REMOVING A MODULE. First read over the Summary of Procedures that follows to understand how the procedures are grouped. Then read Equipment Required for a list of the tools needed to remove and install modules in this oscilloscope.
Page 208 All equipment required to remove and reinstall each module is listed in the first step of its procedure. Table 6–4: Tools Required for Module Removal Item Tektronix Part Number Name Description...
Page 209 Removal and Installation Procedures Rear Cover Cabinet Fuse Cap Line Fuse Line Cord EMI Gasket Handle Handle Cap Foot Display EMI Gasket Foot Pad Frame Flip Stand Front Panel Knobs Menu Buttons Attenuator Cover A12 Front Panel Assembly Trim Ring Front Cover Figure 6–1: External Modules 6–12...
Page 210 Removal and Installation Procedures A11 DRAM Processor/Display Board Rear Chassis Top Cover A23 SerPar Board Board Bracket A14 D1 Bus Analog and Digital Power Cables A10 Acquisition Board Figure 6–2: Outer-Chassis Modules 6–13 TDS 500B, 600B and TDS 700A Service Manual...
Page 211 Removal and Installation Procedures A30 Display Assembly A16 Power Supply Main Chassis Front Subpanel Figure 6–3: Inner-Chassis Modules 6–14 TDS 500B, 600B and TDS 700A Service Manual...
Page 212 Removal and Installation Procedures Access Procedure Begin with this procedure when you have identified a module to be removed for service and have read General Instructions found earlier in this section. 1. Locate module to be removed: a. Find the module to be removed in the module locator diagrams, Figures 6–1 through 6–3.
Page 213 Removal and Installation Procedures c. Do, in the order listed, the three procedures A14 D1 Bus and Analog- Power and Digital-Power Cables, A11 Processor/Display Board and Top Cover found under Procedures for Outer-Chassis Modules, page 6–29. d. Find and do the procedure whose title matches the name of the module to be removed under Procedures for Inner-Chassis Modules, page 6–46.
Page 214 Removal and Installation Procedures When reinstalling the knobs, note there are three sizes. Be sure to reinstall the proper size knob in the proper location. Figure 6–4: Knob Removal Line Fuse and Line Cord 1. Assemble equipment and locate modules to be removed: Have a flat-bladed screwdriver (Item 5) handy.
Page 215 Removal and Installation Procedures 5. Reinstallation: Do in reverse steps 3 and 4 to reinstall the line cord and then the line fuse. Unplug Rotate Line Fuse Pull Fuse Cap Figure 6–5: Line Fuse and Line Cord Removal EMI Gaskets See Rear Cover and Cabinet procedure on page 6–18.
Page 216 Removal and Installation Procedures 3. Disconnect the line cord: Unplug the line cord from its receptacle at the rear cover. 4. Remove rear cover: Remove the four screws securing the rear cover to the oscilloscope. Lift off the rear cover. 5.
Page 217 Removal and Installation Procedures b. Take care not to bind or snag the cabinet on internal cabling; redress cables an necessary. c. When sliding the cabinet, be sure that the front edge of the cabinet aligns with the groove containing the EMI shield on the front casting. d.
Page 218 Removal and Installation Procedures Figure 6–6: Rear Cover and Cabinet Removal 6–21 TDS 500B, 600B and TDS 700A Service Manual...
Page 219 Removal and Installation Procedures Front Cover, Trim Ring, 1. Assemble equipment and locate modules to be removed: No tools are needed. Menu Buttons, and Locate the modules to be removed in the locator diagram External Modules, Figure 6–1. Attenuator Panel 2.
Page 220 Removal and Installation Procedures 4. Remove the trim ring: Grasp the trim ring by its top edge and pry it up and lift it forward to snap it off of the front subpanel. If servicing the menu buttons, lift them out of the trim ring. (When reinstalling, reinsert the menu buttons, align the trim ring to the front subpanel and press it back on.) 5.
Page 221 Removal and Installation Procedures Quick Disconnect Stud Mount Torxdrive W76 Cable Screw T–15 Power Assembly Ground Back of Front-Panel Assembly Front–Panel Assembly Ground Figure 6–8: A12 Front-Panel Assembly Removal 4. Further disassembly of front-panel assembly: If the front panel or the front-panel buttons are to be serviced, do the following substeps: a.
Page 222 Removal and Installation Procedures c. Now hand disassemble the front-panel assembly components using Figure 6–9 as a guide. Reverse procedure to reassemble, again using Figure 6–9 as a guide. Figure 6–9: Disassembly of Front-Panel Assembly 5. Reinstallation: If the front-panel assembly was further disassembled in step 4, then reverse substeps 4a–4c to reassemble, using Figure 6–9 as a guide.
Page 223 Removal and Installation Procedures 2. Orient the oscilloscope: Set the oscilloscope so its bottom is down on the work surface and its front is facing you. 3. Remove the display-frame assembly: a. Do the procedure Front Cover, Trim Ring, Menu Buttons, and Attenuator Panel (page 6–22) to remove the front cover and trim ring.
Page 224 Removal and Installation Procedures c. Repeat procedure to remove the remaining cap as needed; push the cap(s) back on to reinstall. 5. Remove the flip stand: Grasp the flip stand by both sides near where it joins each flip stand foot. Now compress the flip stand until the flip stand ends clear the flip stand feet to complete the removal.
Page 225 Removal and Installation Procedures Push down to flex handle and flatten against cabinet; then pull it out. Handle Cap Removal Handle Removal Flip Stand Removal Foot Removal Figure 6–10: Cabinet Modules Removal 6–28 TDS 500B, 600B and TDS 700A Service Manual...
Page 226 Removal and Installation Procedures Procedures for Outer-Chassis Modules You should have completed the Access Procedure before doing any procedure in this collection. The procedures found here, listed in order presented, follow. A14 D1 Bus and Analog-Power and Digital-Power Cables A23 SerPar Board A29 Video Trigger Board A11 Processor/Display Board Top Cover and Board Brackets...
Page 227 Removal and Installation Procedures processor/display board; J100 is on the acquisition board.) Reverse these removal instructions to reinstall. 4. Remove the analog-power and digital-power interconnect cables: a. Unplug the analog-power cable at J26 on the display processor board, at J5 on the low-voltage power supply, and at J700 on the acquisition board.
Page 228 Removal and Installation Procedures A23 SerPar Board — 1. Remove circuit board assembly: RS232/Centronics a. Using a screwdriver with size T-15 Torx tip, remove the two screws Hardcopy Interface (number 4 in Figure 6–12) securing the rear plate of the circuit board (Optional on the assembly.
Page 229 Removal and Installation Procedures b. Separate the circuit board with attached cable (number 1), from the rear plate with attached brackets (number 2). Figure 6–13: Remove Circuit Board From Assembly 3. Replace circuit board: Equipment Required: One inch nutdriver. a. Replace the failed circuit board with a replacement A23 SerPar Board ordered from the factory (see Replaceable Parts List for detailed ordering information).
Page 230 Removal and Installation Procedures b. Locate the modules to be removed in the locator diagram Outer-Chassis Modules, Figure 6–2, page 6–13. See also the A29 Video Trigger Board on Figure 6–15, page 6–35. c. Do the procedures A14 D1 Bus and Analog-Power and Digital-Power Cables and A23 SerPar Board that precede this procedure to remove those items.
Page 231 Removal and Installation Procedures Coax Cable Figure 6–14: Circuit Board Installed 6–34 TDS 500B, 600B and TDS 700A Service Manual...
Page 232 Removal and Installation Procedures Coax Cable To J1500 Figure 6–15: Circuit Board Removal 4. Reinstallation: a. Do, in reverse order, steps a through e. Reverse the removal instructions of each step to reinstall the A29 Video Trigger Board. NOTE. For the TDS 600B, be sure to arrange the coax cable as shown in Figures 6–14 and 6–15.
Page 233 Removal and Installation Procedures b. See the procedures A14 D1 Bus and Analog-Power and Digital-Power Cables (page 6–29), A23 SerPar Board (page 6–31) and Rear Cover and Cabinet (page 6–18) to complete reassembly of the oscilloscope. c. To ensure the Video Trigger is working correctly, perform the Diagnos- tics procedure on page 6–57.
Page 234 Removal and Installation Procedures installed, A29 Video Trigger Board, and Rear Cover and Cabinet (page 6–18) to complete reassembly of the oscilloscope. Unplug the cables. To J51 To J38 To J20 To J37 To J38 To J5 To J62 Slide the A11 DRAM Processor/Display board to the rear to release it from the board mounts;...
Page 235 Removal and Installation Procedures b. Locate the modules to be removed in the locator diagram Outer-Chassis Modules, Figure 6–2, page 6–13. c. Do the procedures A14 D1 Bus and Analog-Power and Digital-Power Cables (page 6–29), A23 SerPar Board (page 6–31), if option 05 is installed A29 Video Trigger Board (page 6–32) and A11 Processor/Dis- play Board (page 6–36) to remove those modules.
Page 236 Removal and Installation Procedures A11 Processor/Display Board (page 6–36) If option 05 is installed, A29 Video Trigger Board (page 6–32) A14 D1 Bus and Analog-Power and Digital-Power Cables (page 6–29) A23 SerPar Board (page 6–31) Front Cover, Trim Ring, Menu Buttons, and Attenuator Panel (page 6–22) Rear Cover and Cabinet (page 6–18) Rear-Panel Cables...
Page 237 Removal and Installation Procedures d. Do the procedure Front Cover, Trim Ring, Menu Buttons, and Attenuator Panel (page 6–22) 2. Orient the oscilloscope: Set the oscilloscope so its top is down on the work surface and its front is facing you. 3.
Page 238 Removal and Installation Procedures Securing Screws D1 Bus MAIN TRIGGER Digital SIGNAL TRIGGER INPUT Power Cable OUTPUT OUTPUT Analog DELAYED Power Cable TRIGGER OUTPUT J1500 J1201 J1100 J1550 J1000 J1001 Five Securing Screws Figure 6–18: A10 Acquisition Board Removal 6–41 TDS 500B, 600B and TDS 700A Service Manual...
Page 239 Removal and Installation Procedures Floppy Disk 1. Assemble equipment and locate modules to be removed: (Optional on the a. Have handy a screwdriver with a small Phillips head. TDS 500B, 620B and 680B) b. Locate the modules to be removed, including those listed under Additional Modules Removed in the locator diagram Outer-Chassis Modules, Figure 6–2, page 6–13.
Page 240 Removal and Installation Procedures Figure 6–19: Floppy Disk Removal 5. Reinstallation: Do, in reverse order, substeps 4b then 4a to reinstall the floppy disk. Then see the following procedures, in the order listed, to complete reassembly of the oscilloscope: Front Cover, Trim Ring, Menu Buttons, and Attenuator Panel (page 6–22).
Page 241 Removal and Installation Procedures Rear Chassis 1. Assemble equipment and locate modules to be removed: a. Have handy a screwdriver with a size T-15 Torx tip (Items 1 and 2). b. Locate the modules to be removed, including those listed under Additional Modules Removed in the locator diagram Outer-Chassis Modules, Figure 6–2, page 6–13.
Page 242 Removal and Installation Procedures DELAY TRIGGER to J1001 MAIN TRIGGER to J1000 AUXILIARY TRIGGER to J1550 CH3 OUT to J1201 EMI Gaskets Figure 6–20: Rear Chassis Removal 6–45 TDS 500B, 600B and TDS 700A Service Manual...
Page 243 Removal and Installation Procedures Procedures for Inner-Chassis Modules You should have completed the Access Procedure (page 6–15) before doing any of the procedures for the Inner-Chassis modules. The procedures are presented in the following order: A16 Low Voltage Power Supply A30 Display Assembly and Supply Fuse Front Subpanel Main Chassis...
Page 244 Removal and Installation Procedures A14 D1 Bus and Analog-Power and Digital-Power Cables (page 6–29) Rear Cover and Cabinet (page 6–18) Rotate the edge of the board upward as indicated to clear the lip of the main chassis when lifting this board out. Figure 6–21: A16 Low Voltage Power Supply Removal A30 Display Assembly NOTE.
Page 245 Removal and Installation Procedures 1. Assemble equipment and locate modules to be removed: Have handy a screwdriver with a size T-15 Torx tip (Items 1 and 2). Locate the modules to be removed in the locator diagram Inner-Chassis Modules, Figure 6–2, page 6–13.
Page 246 Removal and Installation Procedures e. Be sure you have read the WARNING on display tube handling and storage found at the start of this display tube removal procedure. Then pull the display tube out through the front subpanel to complete removal. Store as directed in the previous WARNING message.
Page 247 Removal and Installation Procedures b. Grasp the display driver board. Work from the front and top to tilt the board so its right edge is up and its left side is down and lift it out of the top of the oscilloscope’s main chassis. Move circuit board forward to clear main chassis.
Page 248 Removal and Installation Procedures Top Cover and Board Brackets (top cover only) on page 6–37 A11 Processor/Display Board (page 6–36) If option 05 is installed, A29 Video Trigger Board (page 6–32) A14 D1 Bus and Analog-Power and Digital-Power Cables (page 6–29) Display-Frame Assembly Front Cover, Trim Ring, Menu Buttons, and Attenuator Panel (page 6–22)
Page 249 Removal and Installation Procedures A14 D1 Bus and Analog-Power and Digital-Power Cables (page 6–29) Front Cover, Trim Ring, Menu Buttons, and Attenuator Panel (page 6–22) Rear Cover and Cabinet (page 6–18) Figure 6–24: Front Subpanel Removal Main Chassis Additional Modules Removed: All. 1.
Page 250 Removal and Installation Procedures Disassembly for Cleaning This procedure is for disassembly of the Digitizing Oscilloscopes into its individual modules so they can be cleaned. For the cleaning instructions, see Inspection and Cleaning, which begins this section. 1. Assemble equipment and locate modules to be removed: a.
Page 251 Removal and Installation Procedures 5. Disassemble the chassis: a. Set the assembly so its bottom is down on the work surface and its front is facing you. b. Remove the six screws securing the front subpanel to the main chassis. (See Figure 6–24 for screw location.) c.
Page 252 Removal and Installation Procedures A10 Acquisition Board (page 6–39) d. Reinstall external modules: Do in the order listed the following procedures. When doing these procedures, do the steps in reverse order. These procedures are found under Procedures for External Modules which starts on page 6–16.
Page 253 Removal and Installation Procedures 6–56 TDS 500B, 600B and TDS 700A Service Manual...
Page 254 Troubleshooting This subsection contains information and procedures designed to help you isolate faulty modules in the oscilloscope. If a module needs to be replaced, follow the Removal and Installation Procedures located in this section. Diagnostics The oscilloscope has two levels of internal diagnostics that focus on verifying, adjusting, and if need be, isolating faulty modules.
Page 255 Firmware. Figure 6–25 shows how to set the switch. After loading the Firmware, be sure you set the switch back to the protected position and cycle power. If you want to order a firmware update, contact your Tektronix service center. Unprotected Protected Figure 6–25: Accessing the protection switch...
Page 256 Troubleshooting Press on the principal power switch on the back of the oscilloscope. Power off and remove the cover using Press the Rear Cover and Cabinet removal the ON/STBY Can you procedure. Check all the cables coming button. Can you hear the fan out of the Low Voltage Power Supply, hear the...
Page 257 Troubleshooting Power Power Replace the on again and on again and there 5.1 V on A11 DRAM observe the LED observe the LED J27 pin 17? (See processor/display ( DS1). Does it (DS1). Does it Figure 6–36.) module. display only display Perform the A16 Low voltage power supply module isolation Replace the A17...
Page 258 Troubleshooting This procedure assumes that the oscilloscope is up and running and you can read the display. Select the extended diagnostics Does the Are any menu and run all the test suites (the display report failures The oscilloscope is ok. discussion of the Diagnostics on any errors? reported?
Page 259 Troubleshooting Does Use this procedure to determine if an the oscilloscope The oscilloscope may have oscilloscope problem is caused by the Low powered off because it power on, all the diagnostics pass, Voltage Power Supply. Connect the over-heated. Wait 5 minutes and but sometime later it powers off oscilloscope to the correct power source.
Page 260 Troubleshooting Table 6–5: Normal supply voltages (measured on J26 and J27 on the A11 DRAM processor/display module) Supply Lower Limit Upper Limit Ground (J26 or J27 pin 15) +5.1 VA (J27 pin 5) +5.0 V +5.2 V +5.1 VB (J27 pin 17) +5.0 V +5.2 V +25 V (J27 pin 1)
Page 261 Troubleshooting This procedure helps you determine whether the color display or the A11 DRAM processor/display module is bad. J18 pins 1 and 2 the display on the A11 DRAM Replace the A30 legible but the horizontal processor/display module Display Assembly. and/or vertical sync do (see Figure 6–38) have not look...
Page 262 Troubleshooting J18 pin 1 (Horizontal Sync) J18 pin 2 (Vertical Sync) Figure 6–31: Horizontal and vertical sync signals – color display White Level J62 pin 1 (Video) Black Levels Blanking Levels Figure 6–32: A video signal with white, black, and blanking levels – color display 6–65 TDS 500B, 600B and TDS 700A Service Manual...
Page 263 Troubleshooting This procedure helps you determine whether the A10 Acquisition or the A11 DRAM processor/display module is bad. Replace the A14 D1 Bus module. Be sure you connect the A14 D1 Bus module correctly (the silk screen on the module will help you correctly orient the module).
Page 264 Troubleshooting This procedure helps you determine if the A11 DRAM processor/display or the A12 Front Panel module is bad. the cable from the A11 DRAM Connect the cable and then processor/display module to perform the Primary the A12 Front Panel module troubleshooting procedure.
Page 265 Troubleshooting Attach a probe to the PROBE COMPENSATION signal located on the front of the oscilloscope. Connect the probe to a channel’s BNC on the front, select the channel and view the output on the display. Do this for all the channels. Set all the channels to the same vertical scale For all Do all...
Page 266 Troubleshooting CAUTION. Only probe points specified in the procedures. You can cause catastrophic damage if you attempt to probe other points. 6–69 TDS 500B, 600B and TDS 700A Service Manual...
Page 267 Troubleshooting Pin 100 U1331 U2000 U2001 Pin 1 Pin 3 Pin 17 Pin 3 Pin 4 Pin 5 U1097 Figure 6–36: A11 DRAM processor/display module 6–70 TDS 500B, 600B and TDS 700A Service Manual...
Page 268 Troubleshooting U174 Figure 6–37: A11 DRAM processor/display Module (View of Upper Left Corner) U190 Figure 6–38: A11 DRAM processor/display Module (View of Lower Left Corner) 6–71 TDS 500B, 600B and TDS 700A Service Manual...
Page 269 Troubleshooting U1001 U1540 U604 Pin 5 Pin 7 Pin 9 Pin 11 Figure 6–39: A10 Acquisition module (view of lower right corner) 6–72 TDS 500B, 600B and TDS 700A Service Manual...
Page 271 This appendix describes the various options as well as the standard and optional accessories that are available for the TDS 500B, 600B and 700A Oscilloscope. Options Tektronix will ship the options shown in Table 7–1: Table 7–1: Options Option #...
Page 272 Extend record length from 50,000 standard as follows: 130,000 record length TDS 520B & 724A: To 250,000 samples on one channel and 130,000 on two channels TDS 540B, 744A, & 784A: To 500,000 samples on one channel,...
Page 273 (Option applies only to TDS 500B and TDS 700A models.) Two probes Delete two standard probes normally shipped with the oscilloscope (Option applies only to TDS 520B, TDS 620B, and TDS 724A models.) 7–3 TDS 500B, 600B and TDS 700A Service Manual...
Page 274 Advanced DSP math Add advanced DSP math features such as FFT, integration, and FFT, INTG, DIFF differentiation. (Option applies only to TDS 520B and TDS 540B models.) 3I and 3P Color printer Tektronix Phaser 140, 360 dpi, inkjet, color printer.
Page 275 070-9384-XX Probes: TDS 540B: Four P6139A 10X, 500 MHz Passive probes P6139A TDS 520B: Two P6139A 10X, 500 MHz Passive probes P6243 TDS 620B: Two P6139A 10X, 500 MHz Passive probes TDS 644B: Four P6243 probes TDS 744A: Four P6139A 10X, 500 MHz Passive probes...
Page 276 Options and Accessories P6243 Active, high speed digital voltage probe. FET. DC to 1.0 GHz. 50 input P6101B 1X, 15 MHz, Passive probe P6156 10X, 3.5 GHz, Passive, low capacitance, (low impedance Z ) probe. Provides 100X, when ordered with Option 25 P6139A 10X, 500 MHz Passive probe P6217 Active, high speed digital voltage probe.
Page 277 Service Assurance Tektronix offers the following services that you can purchase any time during the warranty period of this product: REPXXXX provides one year of post-warranty repair support. It is available in one year increments up to three years.
Page 278 Options and Accessories 7–8 TDS 500B, 600B and TDS 700A Service Manual...
Page 280 Electrical Parts List The modules that make up this instrument are often a combination of mechanical and electrical subparts. Therefore, all replaceable modules are listed in Section 10, Mechanical Parts List. Refer to that section for part numbers when using this manual. 8–1 TDS 500B, 600B and TDS 700A Service Manual...
Page 281 Electrical Parts List 8–2 TDS 500B, 600B and TDS 700A Service Manual...
Page 283 The tilde (~) preceding a signal name indicates that the signal performs its intended function when in the low state. Other standards used in the preparation of diagrams by Tektronix. Inc are: Tektronix Standard 062–2476 Symbols and Practices for Schematic Drafting ANSI Y14.159–1971 Interconnection Diagrams...
Page 284 Diagrams Front Acquisition J1201 Panel Board Front Panel Board Menu Switches Switches J1550 SIGNAL Front Panel Knobs J1000 J1001 J1153 15 Pins Flex CH 1 J1002 Attenuator CH 2 J1003 CH 3 J102 CH 4 J100 J101 J1500 Main Converter Power Factor Control Board Control Board...
Page 285 Diagrams SIGNAL OUTPUT TRIGGER INPUT MAIN TRIGGER OUTPUT DELAYED TRIGGER OUTPUT Dram GPIB IEEE Processor STD 488 Display PORT Board 15 PIN VGA ANALOG OUTPUT Cartridge Console Serpar Service Port Board CENTRONIICS COMPATIBLE Display RS-232 Driver D1 Bus Board Board CRT Anode Vert Yoke P100...
Page 286 Diagrams Acquisition CH 1 CH 2 CH 3 Attenuator CH 4 Video Triggers Trigger (Option 05) Converters D1 Bus Front Panel Front Panel ON/STBY Switches Menu ON/STBY Switches Front Panel LEDS Front Panel Pots SIGNAL Probe Compensation Low Voltage Power Supply Filter Floppy Power to All Circuits...
Page 287 Diagrams SIGNAL OUTPUT TRIGGER INPUT MAIN TRIGGER OUTPUT DELAYED TRIGGER OUTPUT Dram Processor/ GPIB IEEE Connector Display STD 488 (Option 05) PORT 15 PIN VGA ANALOG OUTPUT Processor System CENTRONIICS Serpar COMPATIBLE RS-232 Display Driver CRT Anode Vert Yoke 68020 Video VIDEO FSYNC/...
Page 288 Diagrams 9–6 TDS 500B, 600B and TDS 700A Service Manual...
Page 290 This section contains a list of the replaceable modules for the oscilloscope. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative. Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements.
Page 291 Figure & Index Number Items in this section are referenced by component number. Tektronix Part Number Use this part number when ordering replacement parts from Tektronix. 3 and 4 Serial Number Column three indicates the serial number at which the part was first effective. Column four indicates the serial number at which the part was discontinued.
Page 292 Mechanical Parts List Manufacturers Cross Index Mfr. Code Manufacturer Address City, State, Zip Code S3109 FELLER 72 VERONICA AVE SUMMERSET NJ 08873 UNIT 4 TK0IK MODERN METALS UNIT A/K, 5/F GOLD KING IND. KWAI–CHUNG N.T. HONG KONG BLDG NO. 35–41 TAI LIN ROAD TK0488 CURRAN COIL SPRING INC 9265 SW 5TH...
Page 293 PETALUMA CA 94952–1152 75915 LITTELFUSE TRACOR INC 800 E NORTHWEST HWY DES PLAINES IL 60016–3049 SUB OF TRACOR INC 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077–0001 PO BOX 500 10–4 TDS 500B, 600B and TDS 700A Service Manual...
Page 294 Mechanical Parts List Replaceable Parts List Fig. & Tektronix Part Serial No. Serial No. Mfr. Index Number Effective Discont’d Code Name & Description Mfr. Part Number Number 1–1 200–3695–02 COVER,REAR:REAR COSMETIC COVER TK1163 200–3695–02 –2 161–0230–01 CABLE ASSY,PWR,:3,18 AWG,92 L,SVT,TAN...
Page 295 Mechanical Parts List Replaceable Parts List (Cont.) Fig. & Tektronix Part Serial No. Serial No. Mfr. Index Number Effective Discont’d Name & Description Code Mfr. Part Number Number –18 366–2114–00 KNOB:LARGE,DETENTED TK1163 ORDER BY DESC –19 366–2111–00 KNOB:SMALL,FLUTED TK1163 ORDER BY DESC –20...
Page 296 Mechanical Parts List Figure 10–1: External Modules 10–7 TDS 500B, 600B and TDS 700A Service Manual...
Page 297 GASKET, RF, SHIELDING –6 131–1315–01 CONN,RF JACK:BNC/PNL, 50 OHM, FEMALE 24931 28JR306–1 –7 679–2437–00 CIRCUIT BD ASSY:RS232/CENTRONIC; 80009 679243700 (OPTION 13 ON TDS 520B, 540B, 620B, & 680B) –8 407–3825–00 BRACKET,CKT BD:PLASTIC,REAR TK1163 ORDER BY DESC –9 386–6182–00 PLATE,REAR:ALUMINUM,RS232/CENTRONIC 0J9P9 386–6182–00 (OPTION 13 ON TDS 520B, 540B, 620B &...
Page 298 Mechanical Parts List Figure 10–2: Outer-Chassis Modules 10–9 TDS 500B, 600B and TDS 700A Service Manual...
Page 299 DISPLAY MODULE:TDS FAMILY FULL COLOR 80009 640–0077–11 (TDS 644B, 684B, & 700A ONLY) 640–0071–06 DISPLAY,MONOCHR:7 INCH 80009 640–0071–06 (TDS 520B, 540B, 620B, & 680B ONLY) 378–0366–01 FILTER,LT,CRT:6.525 X 5.225, ESP, EMC 11536 378–0366–01 (TDS 520B, 540B, 620B, & 680B ONLY) 386–6211–02 RETAINER,FILTER:DUST SEAL ASSY,LEXAN TK1163 386–6211–02...
Page 300 Mechanical Parts List Figure 10–3: Inner-Chassis Modules 10–11 TDS 500B, 600B and TDS 700A Service Manual...
Page 301 Mechanical Parts List Replaceable Parts List Fig. & Tektronix Part Serial No. Serial No. Mfr. Index Number Effective Discont’d Code Name & Description Mfr. Part Number Number 4–1 174–2031–00 CABLE ASSY,RF:50 OHM COAX,6.5 L,W/BLUE JKT TK2338 174–2031–00 (A10J1000 MAIN TO TRIGGER OUTPUT) (A10J1001 TO DELAYED TRIGGER OUTPUT) 10–12...
Page 302 Mechanical Parts List Figure 10–4: Cables, Bottom View 10–13 TDS 500B, 600B and TDS 700A Service Manual...
Page 303 Mechanical Parts List Replaceable Parts List Fig. & Tektronix Part Serial No. Serial No. Mfr. Index Number Effective Discont’d Code Name & Description Mfr. Part Number Number 5–1 174–1525–00 CA ASSY,SP,ELEC:2 X 8–13,28 AWG TK2469 ORDER BY DESC –2 174–1524–01 CA ASSY SP:RIBBON,GPIB;IDC,24,28 AWG,4.0L...
Page 304 Mechanical Parts List Figure 10–5: Cables, Top View 10–15 TDS 500B, 600B and TDS 700A Service Manual...
Page 305 (OPTION 1F ON TD 520B, 540B, 620B, & 680B) –2 211–0840–00 SCREW,MACHINE:M2.6 X 0.45MM PITCH X 4.0 L 0KB01 .26C4MXPHY (OPTION 1F ON TDS 520B, 540B, 620B, & 680B) –3 211–0730–00 SCR,ASSEM WSHR:6–32 X 0.375,PNH,STL 0KB01 ORDER BY DESC (OPTION 1F ON TDS 520B, 540B, 620B, & 680B) –4...
Page 306 Mechanical Parts List Figure 10–6: Floppy Disk 10–17 TDS 500B, 600B and TDS 700A Service Manual...
Page 307 Mechanical Parts List Replaceable Parts List Fig. & Tektronix Part Serial No. Serial No. Mfr. Index Number Effective Discont’d Code Name & Description Mfr. Part Number Number STANDARD ACCESSORIES 7–1 161–0104–05 CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5 M S3109 198–010 (OPTION A3 – AUSTRALIAN) –2...
Page 308 Mechanical Parts List Figure 10–7: Accessories Replaceable Parts List Fig. & Tektronix Part Serial No. Serial No. Mfr. Index Number Effective Discont’d Code Number Name & Description Mfr. Part Number OPTIONAL ACCESSORIES 003–1457–01 BIT,TORX DRIVER:MODIFY THE T–20 TK1465 003–1457–01 012–0991–00...
Page 309 Mechanical Parts List 10–20 TDS 500B, 600B and TDS 700A Service Manual...

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