Agilent Technologies 54621A Service Manual
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Agilent Technologies 54621A Service Manual

Oscilloscope and mixed-signal oscilloscope
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Summary of Contents for Agilent Technologies 54621A

  • Page 1 December...

  • Page 2: The Oscilloscope At A Glance

    • Agilent 54621A - 2-channel, 60-MHz bandwidth • Modes include Edge, Pulse Width, Pattern, CAN, Duration, I C, LIN, Sequence, SPI, TV, and USB • Agilent 54621D - 2-channel +16 logic channels, 60- triggering MHz bandwidth • Agilent 54622A - 2-channel, 100-MHz bandwidth General controls measure, save and restore results, •...
  • Page 6 Contents...

  • Page 9: General Information

    General Information...
  • Page 10 General Information...
  • Page 11 General Information Figure 1-1 54620-68701 digital probe kit* 54620-Series Oscilloscope 54620-61801 16-channel cable*** Ä 5959-9334 2” Probe ground lead (qty 5) Accessories pouch and front-panel cover** 5090-4833 Grabber (qty 20) IntuiLink for 54600-series software, Data Capture 10074C Probes software and serial cable** Power cord * 54621D /22D only ** 54622A/22D/24A only...

  • Page 12: Options Available

    (in and out): RS-03 magnetic interface shielding added to CRT, and RE-02 display shield added to CRT to reduce radiated interference. Rackmount kit (same as Agilent 1186A) ANSI Z540 compliant calibration service See table 1-3 for power cord options...

  • Page 13: Accessories Available

    General Information Table 1-2 Accessories available Model Description 01650-61607 16:16 logic cable and terminator (for use with 54621D/22D) 54620-68701 16:2 x 8 logic input probe assembly (shipped standard with 54621D/22D) 1146A 100 kHz current probe, ac/dc 1183A Testmobile scope cart 1185A Carrying case 1186A...
  • Page 14 General Information Table 1-3. Power Cords Plug Type Cable Part Number Plug Type Cable Part Number Opt 900 (U.K.) 8120-1703 Opt 918 (Japan) 8120-4754 Opt 901 (Australia) 8120-0696 Opt 919 (Israel) 8120-6799 Opt 902 (Europe) 8120-1692 Opt 920 (Argentina) 8120-6871 Opt 903 (U.S.A.) 8120-1521 Opt 921 (Chile)
  • Page 15 General Information Acquisition: Analog Channels * Denotes Warranted Specifications, all others are typical. Specifications are valid after a 30-minute warm-up period and ±10 °C from firmware calibration temperature. Acquisition: Analog Channels Max Sample rate 200 MSa/s Max Memory Depth 4 MB interleaved, 2 MB each channel Vertical Resolution 8 bits Peak Detection...
  • Page 16 * Denotes Warranted Specifications, all others are typical. Specifications are valid after a 30-minute warm-up period and ±10 °C from firmware calibration temperature. Vertical System: Analog Channels Analog channels 54621A/21D, 54622A/22D: Ch1 and 2 simultaneous acquisition 54624A: Ch 1, 2, 3, and 4 simultaneous acquisition Bandwidth (-3dB)* 54621A/22D: dc to 60 MHz...
  • Page 17 General Information Vertical System: Analog Channels (continued) * Denotes Warranted Specifications, all others are typical. Specifications are valid after a 30-minute warm-up period and ±10 °C from firmware calibration temperature. Vertical System: Analog Channels (continued) ESD Tolerance ±2 kV Noise Peak-to-Peak 2% full scale or 1 mV, whichever is greater Common Mode Rejection Ratio 20 dB @ 50 MHz...
  • Page 18 General Information Horizontal * Denotes Warranted Specifications, all others are typical. Specifications are valid after a 30-minute warm-up period and ±10 °C from firmware calibration temperature. Horizontal Range 5 ns/div to 50 s/div Resolution 25 ps Vernier 1-2-5 increments when off, 25 minor increments between major settings when on Reference Positions Left, Center, Right Delay Range...

  • Page 19: Trigger System

    * Denotes Warranted Specifications, all others are typical. Specifications are valid after a 30-minute warm-up period and ±10 °C from firmware calibration temperature. Trigger System Sources: 54621A/22A: Ch 1, 2, line, ext 54621D/22D: Ch 1, 2, line, ext, D15 - D0 54624A: Ch 1, 2, 3, 4, line, ext Modes...
  • Page 20 25 MHz, < 75 mV 25 MHz to max bandwidth, < 150 mV Coupling AC (~ 3.5 Hz), DC, noise reject, HF reject and LF reject (~ 50 kHz) Probe ID (Agilent/HP & Tek Auto probe sense for 54621A/22A Compatible)
  • Page 21 General Information Display System * Denotes Warranted Specifications, all others are typical. Specifications are valid after a 30-minute warm-up period and ±10 °C from firmware calibration temperature. Display System Display 7-inch raster monochrome CRT Throughput of Analog Channels 25 million gray scale vectors/sec per channel Resolution 255 vertical by 1000 horizontal points (waveform area) 32 levels of gray scale...
  • Page 22 General Information * Denotes Warranted Specifications, all others are typical. Specifications are valid after a 30-minute warm-up period and ±10 °C from firmware calibration temperature. Points Fixed at 2048 points Source of FFT Analog channels 1 or 2 (or 3 or 4 for 54624A), 1+2, 1-2, 1*2 Window Rectangular, Flattop, Hanning Noise Floor...
  • Page 23 Vibration HP/Agilent class B1 and MIL-PRF-28800F Class 3 random Shock HP/Agilent class B1 and MIL-PRF-28800F (operating 30 g, 1/2 sine, 11-ms duration, 3 shocks/axis along major axis. Total of 18 shocks) Pollution degree2 Normally only dry non-conductive pollution occurs. Occasionally a temporary conductivity caused by condensation must be expected.
  • Page 27 Analog channels (2 or 4, depending on the oscilloscope model) Analog channels (2) Digital channels (16)
  • Page 28 Preparing the Oscilloscope for Use To adjust the handle Œ 54622D Agilent MIXED SIGNAL OSCILLOSCOPE CHANNEL Time/Div Select 5 ns INPUTS...
  • Page 29 Preparing the Oscilloscope for Use To power-on the oscilloscope T rigger out...
  • Page 30 Preparing the Oscilloscope for Use To adjust the display intensity Bright Intensity control Display Grid...
  • Page 31 Preparing the Oscilloscope for Use To connect the oscilloscope probes Probe Comp Autoscale Perfectly compensated Over compensated Under compensated comp.cdr...
  • Page 32 Preparing the Oscilloscope for Use To use the digital probes (mixed-signal oscilloscope only)
  • Page 33 Preparing the Oscilloscope for Use To use the digital probes (mixed-signal oscilloscope only) Grabber...
  • Page 34 Preparing the Oscilloscope for Use To use the digital probes (mixed-signal oscilloscope only) Signal Lead Ground Lead Grabber Channel Pod Ground Circuit Ground...
  • Page 35 Preparing the Oscilloscope for Use To use the digital probes (mixed-signal oscilloscope only) Signals Ground...
  • Page 36 Preparing the Oscilloscope for Use To connect a printer Utility Print Confg Print to: Parallel Format Utility Controller RS-232 Baud XON DTR...
  • Page 37 Preparing the Oscilloscope for Use To verify basic oscilloscope operation Save/Recall Default Setup Autoscale Verifying Basic Oscilloscope Operation...
  • Page 39 Preparing the Oscilloscope for Use To verify basic oscilloscope operation Getting Started...
  • Page 40 Language Language Utility Language...
  • Page 41 Preparing the Oscilloscope for Use Selecting a language for Quick Help after you have been operating the oscilloscope Utility Language Language...
  • Page 42 Preparing the Oscilloscope for Use Loading a language from floppy disk Utility Language Load Languages Language...
  • Page 43 C A U T I O N...
  • Page 46 If a performance test fails If a performance test fails, first perform the User Cal procedure given in Chapter 4. If the User Cal procedure does not correct the problem, refer to Chapter 4, Calibrating and Adjusting.

  • Page 47: Testing Performance

    Not required if 01660-63801 Test Fixture is available See “To construct the test connector” later in this chapter Test fixture For testing digital channel threshold accuracy Agilent 01660-63801 Digital Multimeter 0.1 mV resolution, 0.005% accuracy Agilent 34401A Power Splitter Outputs differ by 0.15 dB...
  • Page 48 The test connector is not required if 01660-63801 Test Fixture is available. Table 3-1 Materials Required to Construct the Test Connectors Description Recommended Part BNC (f) Connector Agilent 1250-1032 Berg Strip, 8-by-2 Jumper wire Figure 3-1 Constructing the 8-by-2 Connector...
  • Page 49 Testing Performance To test the 54621D/22D Oscilloscope digital channels Only the 54621D/22D Mixed-Signal Oscilloscope has Digital Channels You need to perform these instructions only if you will be testing the digital channels on the Agilent 54621D/22D Mixed-Signal Oscilloscope. Autoscale...
  • Page 50 Testing Performance To verify digital channel threshold accuracy Test Threshold Accuracy only on the 54621D/22D Mixed-Signal Oscilloscope You need to perform these instructions only if you will be testing the Agilent 54621D/22D Mixed-Signal Oscilloscope. Table 3-2 Equipment Required to Test Threshold Accuracy...
  • Page 51 Testing Performance To verify digital channel threshold accuracy Figure 3-2 5 46 2 0 A STO R A G E 1 6 C H AN N EL 5 0 0 M S a/ s M ix e d S ig n a l O sc illo sc o p e Oscilloscope M e a sure tim e S a ve/ Re c a ll...
  • Page 52 Testing Performance To verify digital channel threshold accuracy Figure 3-3 $ STO RA G E 1 6 C HA N N EL 5 0 0 MS a/s M ix e d S i g n a l O s c i l lo s c o p e Me a su re tim e Oscilloscope Sa ve/R ec al l...
  • Page 53 Testing Performance To verify digital channel threshold accuracy User Table 3-3 Threshold Accuracy Voltage Test Settings Threshold voltage setting DC offset voltage setting Limits (in oscilloscpe User softkey) (on oscilloscope calibrator) +5.00 V +5.250 V ±1 mV dc Lower limit = +4.750 V Upper limit = +5.250 V –5.00 V –4.750 V ±1 mV dc...
  • Page 54 Table 3-4 Equipment Required to Verify Voltage Measurement Accuracy Equipment Critical Specifications Recommended Model/Part Power supply 14 mV to 35 Vdc, Fluke 5820A or Agilent 3245A 0.1 mV resolution Digital multimeter Better than 0.01% accuracy Agilent 34401A Cable BNC, Qty 2...
  • Page 55 Testing Performance To verify voltage measurement accuracy Table 3-5 Settings Used to Verify Voltage Measurement Accuracy Volts/Div Setting Power Supply Setting Test Limits 5 V/Div 35 V 34.04 V to 35.96 V 2 V/Div 14 V 13.616 V to 14.384 V 1 V/Div 6.808 V to 7.192 V...
  • Page 56 Testing Performance To verify voltage measurement accuracy Use a Blocking Capacitor to Reduce Noise On the more sensitive ranges, such as 1 mV/div, 2 mV/div, and 5 mV/div, noise may be a factor. To eliminate the noise, use a BNC Tee, blocking capacitor, and BNC shorting cap to shunt the noise to ground.
  • Page 57 Recommended Model/Part Oscilloscope Calibrator Fluke 5820A Cable * Type N (m), 24-inch Agilent 11500B Feedthrough 50 , BNC (m) and (f) Agilent 11048C * The oscilloscope calibrator is supplied with 2 or more coaxial cables N (m), BNC (m), 1 meter long, Fluke P/N 686318.
  • Page 58 Testing Performance To verify bandwidth Acquire Averaging # Avgs Autoscale Quick Meas Peak-Peak Table 3-7 Signal Generator Frequency Setting Selected Channel 54621A/21D 54622A/22D 54624A Channel 1 60 MHz 100 MHz 100 MHz Channel 2 60 MHz 100 MHz 100 MHz Channel 3 —...
  • Page 59 Equipment Required to Verify Horizontal t and 1/ t Accuracy Equipment Critical Specifications Recommended Model/Part Oscilloscope Calibrator Stability 5 ppm after 1/2 hour Fluke 5820A Cable BNC, 3 feet Agilent 10503A Feedthrough 50 , BNC connectors (m) and (f) Agilent 11048C Marker Display key, Vectors Autoscale Main/Delayed...
  • Page 60 Testing Performance To verify horizontal Dt and 1/Dt accuracy 54622A/22D/24A only 54621A and 54621D only...
  • Page 61 N (m) to BNC (f), Qty 3 Agilent 1250-0780 Feedthrough 50 , BNC connectors (m) and (f) Agilent 11048C (2 required) * The oscilloscope calibrator is supplied with 2 or more coaxial cables N (m), BNC (m), 1 meter long, Fluke P/N 686318.
  • Page 62 Testing Performance To verify trigger sensitivity Save/Recall Default Setup Autoscale...
  • Page 63 Testing Performance To verify trigger sensitivity Autoscale Edge...
  • Page 64 Agilent 54622A/54622D/54624A Serial No. ______________________________________ Test by _____________________________ Test Interval ____________________________________ Work Order No. ______________________ Recommended Next Testing ________________________ Temperature ____________ Threshold Specification Limits Ch D7-D0 Ch D15-D8 5 V - 250 mV 4.750 V ________ ________ Accuracy Test (100 mV + 3% of 5 V + 250 mV 5.250 V...
  • Page 65 Agilent 54621A/54621D Serial No. ______________________________________ Test by _____________________________ Test Interval ____________________________________ Work Order No. ______________________ Recommended Next Testing ________________________ Temperature ____________ Threshold Specification Limits Ch D7-D0 Ch D15-D8 5 V - 250 mV 4.750 V ________ ________ Accuracy Test (100 mV + 3% of 5 V + 250 mV 5.250 V...

  • Page 69: Calibrating And Adjusting

    Calibrating and Adjusting W A R N I N G C A U T I O N C A U T I O N C A U T I O N...
  • Page 70 Calibrating and Adjusting To adjust the power supply Table 4-1 Equipment Required to Adjust the Power Supply Equipment Critical Specifications Recommended Model/Part Digital multimeter 0.1 mV resolution, accuracy ±0.05% Agilent 34401A...
  • Page 71 Calibrating and Adjusting To adjust the power supply Figure 4-1 ( ( Low Voltage Power Supply Voltages (on the bottom of the oscilloscope) Table 4-2 Power Supply Voltage Tolerances Supply Voltage Tolerance +5.1 V ±250 mV (4.85 V to 5.35 V) -5.2 V ±156 mV (-5.04 V to -5.36 V) +15.75 V...
  • Page 72 Calibrating and Adjusting To adjust the power supply Figure 4-2 +3.3V Adjustment E2 and E3 8.5 V DC +5.1 / -5.2 V Fan Connector Printer Power Balance Adjustment Low Voltage Power Supply Adjustments (on the top of the oscilloscope)
  • Page 73 Calibrating and Adjusting To perform User Cal Utility Service User Cal...
  • Page 74 Table 4-3 Equipment Required to Adjust the Oscilloscope Display Equipment Critical Specifications Recommended Model/Part Digital multimeter Accuracy ±0.05,% 1 mV resolution Agilent 34401A +B.ADJ V.HOLD (vertical hold) INTENSITY (intensity control on oscilloscope front panel) H.HOLD (horizontal hold) FOCUS V.LIN...
  • Page 75 Calibrating and Adjusting To adjust the oscilloscope display H.HOLD FOCUS V.LIN V.SIZE Figure 4-3 E Oscilloscope Display Board Adjustments...
  • Page 78 Read All Cautions and Warnings Before you begin any troubleshooting, read all Warning and Cautions in the “Troubleshooting” section.
  • Page 79 Autoscale...
  • Page 80 Troubleshooting If the trace display is unusual or unexpected Clear Display Autoscale...
  • Page 81 Troubleshooting If you cannot see a channel Autoscale D15 Thru D8 D7 Thru D0 Autoscale...
  • Page 82 Table 5-1 Equipment Required to Troubleshoot the Oscilloscope Equipment Critical Specifications Recommended Model/Part Digital multimeter Accuracy ±0.05,% 1 mV resolution Agilent 34401A Oscilloscope 100 MHz, 1 M input R Agilent 54622A Dummy load Compatible with power supply See “To construct your own...

  • Page 83: Troubleshooting

    Troubleshooting To construct your own dummy load Connector Load (Amps) Resistor Watts Connect to Pin Ground to Pin +5.1 V 4.4 A 22 W 10, 11, 12 13, 14 -5.2 V 1.6 A 3.25 4, 5 +15.75 V 1.2 A 13.1 20 W +3.3 V...
  • Page 84 Troubleshooting To check out the oscilloscope C A U T I O N...
  • Page 85 Troubleshooting To check out the oscilloscope Table 5-2 Display Signals on the System Board – All Oscilloscopes Signal Name Frequency Pulse Width Voltage J900 Pin 14 Hsync 19.72 kHz 3.0 ms 4.5 V J900 Pin 13 Vsync 60.00 Hz 253.5 ms 4.5 V Table 5-3 Low Voltage Power Supply Tolerances...
  • Page 86 Troubleshooting To check out the oscilloscope Figure 5-2 +3.3V Adjustment +5.1 / -5.2 V Fan Connector Printer Power Balance Adjustment Location of the Fan Connector...
  • Page 87 Troubleshooting To check the Low Voltage Power Supply C A U T I O N Figure 5-3 ( ( Low Voltage Power Supply Test Points...
  • Page 88 Troubleshooting To check the Low Voltage Power Supply Table 5-4 Low Voltage Power Supply Tolerances Supply Voltage Tolerance +5.1 V ±153 mV (+4.947 V to +5.253 V) -5.2 V ±156 mV (-5.04 V to -5.36 V) +15.75 V +1.260 V, -787 mV (+14.963 V to +17.010 V) +3.3 V ±100 mV (+3.20 V to +3.40 V) If the Fuse is Blown...
  • Page 89 Troubleshooting To run the internal self-tests Utility Service Self Test...

  • Page 93: Replacing Assemblies

    Replacing Assemblies W A R N I N G W A R N I N G C A U T I O N C A U T I O N...
  • Page 94 Replacing Assemblies To remove the cabinet Figure 6-1 Removing the cabinet...
  • Page 95 Replacing Assemblies To remove the fan Figure 6-2 Removing the fan...
  • Page 96 Replacing Assemblies To remove the floppy drive Figure 6-3 Removing the floppy drive...
  • Page 97 Replacing Assemblies To remove the front panel Figure 6-4 Removing the intensity shaft and front panel...
  • Page 98 Replacing Assemblies To remove the display Figure 6-5 Removing the display C A U T I O N...
  • Page 99 Replacing Assemblies To remove the display Figure 6-6 Gently apply outward pressure at this corner of the slot ( Unhooking the power switch shaft...
  • Page 100 Replacing Assemblies To remove the system board Figure 6-7 Preparing to remove the system board...
  • Page 101 Replacing Assemblies To remove the system board Figure 6-8 Removing the system board...
  • Page 102 Replacing Assemblies To remove the power supply Figure 6-9 Disconnecting ground wire and ribbon cable...
  • Page 103 Replacing Assemblies To remove the power supply Figure 6-10 Gently apply outward pressure at this corner of the slot ( Unhooking the power switch shaft...
  • Page 104 Replacing Assemblies To remove the power supply Figure 6-11 Removing the power supply...
  • Page 105 Replacing Assemblies To remove the keyboard assembly Figure 6-12 Removing the keyboard assembly C A U T I O N...
  • Page 106 Replacing Assemblies To remove the handle...
  • Page 109 Replaceable Parts To order a replacement part...

  • Page 110: Replaceable Parts

    Replaceable Parts To order a replacement part Figure 7-1 Exploded View of the 54621A/22A/24A/21D/22D Oscilloscope...
  • Page 111 (54624A – 2 ea) 0515-2691 T8 Machine screw 2190-0068 See Descr Washer - Trig Out (Qty 1 54621A/22A/24A) Washer - Ext Trig & Trig Out (Qty 2 54621D/22D) 1250-2075 See Descr Nut - Trig Out (Qty 1 54621A/22A/24A) Nut - Ext Trig & Trig Out (Qty 2 54621D/22D...
  • Page 112 Front-panel keyboard keypad (54621D/22D) 54624-41901 Front-panel keyboard keypad (54624A) 54622-41902 Front panel softkey keypad 54622-00101 Main Deck 54622-94304 Rear-panel Trig Out label (54621A/22A) 54624-94302 Rear-panel Trig Out/Ext Trig label (54621D/22D/24A) 54642-42201 Front panel (54621A/22A/24A) 54642-42202 Front panel (54621D/22D) MP10 54622-09104 See Descr RFI Gasket (Front) (54621D/22D –...
  • Page 113 To order a replacement part Reference Agilent Part Description Designator Number MP25 54622-63403 See Descr Attenuator lid (54621A/21D/22A/22D - 1 each) (54624A - 2 each) 54630-61601 Display ribbon cable 54710-61603 Front-panel keyboard cable 54801-61625 Floppy diskette driver ribbon cable 54630-61602...

  • Page 115: Declaration Of Conformity

    (including 93/68/EEC) and carries the CE-marking accordingly (European Union). The product was tested in a typical configuration with Agilent Technologies test systems. Date: 01/27/2000 Name Ken Wyatt / Product Regulations Manager For further information, please contact your local Agilent Technologies sales office, agent or distributor.

  • Page 116: Product Regulations

    B Pass - Temporary degradation, self recoverable. C Pass - Temporary degradation, operator intervention required. D Fail - Not recoverable, component damage. Notes: (1) 54621D/54622D = A, 54621A/54622A/54624A = B Sound Pressure Level Less than 60 dBA Regulatory Information for Canada ICES/NMB-001 This ISM device complies with Canadian ICES-001.

  • Page 117: Safety Notices

    (for volt- age reduction or mains isola- tion), the common terminal must be connected to the earth termi- nal of the power source. Agilent Technologies Inc. P.O. Box 2197 1900 Garden of the Gods Road Colorado Springs, CO 80901-2197, U.S.A.
  • Page 118 Windows and MS Windows are The material contained in U.S. registered trademarks of this document is provided Microsoft Corporation. © Agilent Technologies, Inc. 2000- A WARNING notice “as is,” and is subject to 2002 denotes a hazard. It calls being changed, without...

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