Agilent Technologies 54641A User manual

Service Guide
Publication Number 54642-97004
September 2002
For Safety Information and Re ulatory information,
see the pa es at the end of this book.
© Copyri ht A ilent Technolo ies 2002
All Ri hts Reserved
Agilent 54641A/42A
Oscilloscopes and
Agilent 54641D/42D
Mixed-Signal Oscilloscopes
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ii
The Oscilloscope At a Glance
Choose from a variety of oscilloscopes
all with 2 GSa/s sample rate and
2 MBytes of MegaZoom deep memory
per channel for capturing long,
non-repeating signals.
•Agilent 54641A - 2-channel, 350-MHz
bandwidth
•Agilent 54641D - 2-channel +16 logic
channels, 350-MHz bandwidth
•Agilent 54642A - 2-channel, 500-MHz
bandwidth
•Agilent 54642D - 2-channel +16 logic
channels, 500-MHz bandwidth
Display shows current input signals
• All analog and digital (54641D/42D)
channels displayed in main and
delayed mode
• Indicators for channel, time base,
digital (54641D/42D) channel activity,
trigger and acquisition status
• Softkey labels
• Measurement results
Digital channel controls select,
position, and label inputs (54641D/42D)
• Turn channels onor off individuallyor
in groups of 8
• Rearrangeorderofchannelstogroup
related signals
• Create and display labels to identify
channels
General controls measure, save and
restore results, and configure the
oscilloscope
• Waveform math including FFT,
subtract, multiply, integrate, and
differentiate
• Use Quick Meas to make automatic
measurements
• Use cursors to make manual
measurements
• Save or recall measurement
configurations or previous results
• Autoscale performs simple
one-button setup of the oscilloscope
HorizontalControlsselectsweepspeed
and delay parameters
• Sweep speeds from 1 ns/div to
50 s/div
• Delay control moves waveform
display to point of interest
• Delayed mode and delay allow
zooming in to show a portion of
waveform in detail (split screen)
Run control keys begin and end data
acquisition
• Run/Stopstartsandstopscontinuous
acquisitions
• Single performs one acquisition
• Infinitepersistence accumulates and
displays the results of multiple
acquisitions
Trigger keys define what data the
oscilloscope will trigger on
• Source key allows conventional
oscilloscope triggering
• Modes include Edge, Pulse Width,
Pattern, CAN, Duration, I2C, LIN,
Sequence, SPI, TV, and USB
triggering
Softkeys extend the functionality of
command keys
Select measurement types, operating
modes,triggerspecifications,labeldata,
and more
Digitalchannelinputsthrough a flexible
probing system (54641D/42D)
• Sixteen channels through a dual
8-channel cable with micro-clips
• Set logic levels as TTL, CMOS, ECL, or
to a user-definable voltage
Utilities
• Dedicated parallel printer port,
controller operation, floppy disk
storage
Built in Quick Help system
• Press and hold any key front-panel
key or softkey to get help in 11
languages.
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iii
In his Book
This book provides the service information for the A ilent 54641A/42A
Oscilloscope and the A ilent 54641D/42D Mixed-Si nal Oscilloscope.
This manual is divided into these chapters:
Chapter 1 provides eneral information and specifications.
Chapter 2 shows you how to prepare the oscilloscope for use.
Chapter 3 ives performance tests.
Chapter 4 covers calibration and adjustment procedures.
Chapter 5 provides troubleshootin information.
Chapter 6 ives the procedures and techniques for replacin assemblies and
other parts.
Chapter 7 includes a list of replaceable parts, part orderin information, and
shippin information.
At the back of the book you will find Safety information, Warranties, and
Re ulatory information.
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iv
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Contents
Contents-1
1 General Information
To inspect packa e contents 1-3
To inspect options and accessories 1-6
Performance Characteristics 1-9
2 Preparing the Oscilloscope for Use
Setting up the Oscilloscope 2-3
To adjust the handle 2-4
To power-on the oscilloscope 2-5
To adjust the waveform intensity 2-6
To connect the oscilloscope analo probes 2-7
To compensate your analo probe 2-8
To use the di ital probes (mixed-si nal oscilloscope only) 2-9
To connect a printer 2-13
To connect an RS-232 cable 2-13
To verify basic oscilloscope operation 2-14
Getting started using the oscilloscope interface 2-15
Using Quick Help 2-17
Selectin a lan ua e for Quick Help when the oscilloscope starts up 2-17
Selectin a lan ua e for Quick Help after you have been operatin the
oscilloscope 2-18
Loadin an updated lan ua e file from floppy disk 2-19
Cleaning the oscilloscope 2-20
3 Testing Performance
List of Test Equipment 3-3
To construct the test connector 3-4
To test the 54641D/42D Oscilloscope di ital channels 3-5
To verify threshold accuracy 3-6
To verify volta e measurement accuracy 3-10
To verify bandwidth 3-13
To verify horizontal Dt and 1/Dt accuracy 3-15
To verify tri er sensitivity 3-17
A ilent 54642A/42D Performance Test Record 3-20
A ilent 54641A/41D Performance Test Record 3-21
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Contents
Contents-2
4 Calibrating an A justing
To adjust the power supply 4-4
To perform User Cal 4-7
To adjust the oscilloscope display 4-8
5 Troubleshooting
Solving General Problems with the Oscilloscopes 5-3
If there is no trace display 5-3
If the trace display is unusual or unexpected 5-4
If you cannot see a channel 5-5
roubleshooting the Oscilloscope 5-6
To construct your own dummy load 5-7
To check out the oscilloscope 5-8
To check the Low Volta e Power Supply 5-11
To run the internal self-tests 5-13
6 Replacing Assemblies
To remove the cabinet 6-4
To remove the fan 6-5
To remove the floppy drive 6-6
To remove the front panel 6-7
To remove the display 6-8
To remove the system board 6-10
To remove the power supply 6-12
To remove the keyboard assembly 6-15
To remove the handle 6-16
7 Replaceable Parts
To order a replacement part 7-3
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1
General Information

1-2
General Information
This chapter lists general information for the Agilent 54640-series
Oscilloscopes. It also includes performance characteristics and
specifications for the oscilloscopes.

1-3
General Information
To inspect package contents
❏Inspect the shipping container for damage.
If our shipping container appears to be damaged, keep the shipping container
or cushioning material until ou have inspected the contents of the shipment
for completeness and have checked the oscilloscope mechanicall and
electricall .
❏Verify that you received the following items and any optional accessories in
the oscilloscope packaging (see figure following).
• 54640-Series Oscilloscope (54641A, 41D, 42A, or 42D)
• 10073C 10:1 500 MHz passive probes with ID (qt 2)
• 54620-68701 digital probe kit (for 54641D or 42D)
• Accessor pouch and front-panel cover
• Power cord (see table 1-3)
• IntuiLink for 54600-series Oscilloscopes software and RS-232 cable.
IntuiLink is a Windows application that makes it ver eas for ou to
download images, waveform data, or oscilloscope setups from the
oscilloscope to our pc using either Microsoft Word or Microsoft Excel. After
installation of IntuiLink, a tool bar in these Microsoft applications will make
connection and data transfer from the oscilloscope ver simple.
IntuiLink software is available free on the web at:
www.agilent.com/find/5462xsw
RS-232 cable ma be ordered separatel , part number 34398A
If an thing is missing, contact our nearest Agilent Sales Office. If the shipment
was damaged, contact the carrier, then contact the nearest Agilent Sales Office.

1-4
General Information
• Agilent IntuiLink Data Capture
IntuiLink Data Capture is a standalone program for downloading waveform
data from the oscilloscopes to our PC via GPIB or RS-232 interface. It
provides the capabilit to transfer deep memor data out of the oscilloscope,
allowing up to 4MB (scope channels) and 8MB (logic channels). The
IntuiLink for 54600-Series limits the size of acquisition data available to a
maximum of 2,000 points regardless of actual number of acquisition points
on the screen. With the IntuiLink Data Capture, the amount of points
transferred will be the actual number of acquisition points currentl
displa ed or ou ma select the number of points to download. It provides
the following functionalit :
• Download waveform data and displa the data as a simple chart
• Save the data as binar or text files
• Cop the chart and a selected portion of the data to the clipboard. The
maximum data saved to the clipboard is 50,000 point
• Load saved waveform data back into the application
❏Inspect the oscilloscope
• If there is mechanical damage or a defect, or if the oscilloscope does not
operate properl or does not pass the performance tests listed in the Service
Guide, notif our Agilent Sales Office.
• If the shipping container is damaged, or the cushioning materials show signs
of stress, notif the carrier and our Agilent Sales Office. Keep the shipping
materials for the carrier’s inspection. The Agilent Sales Office will arrange
for repair or replacement at Agilent’s option, without waiting for claim
settlement.