Agilent Technologies Agilent 34980A User manual

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深圳德标仪器 135-1095-0799

深圳德标仪器 135-1095-0799

Agilent Technologies
Agilent 34980A 
Multifunction
Switch/Measure Unit
Service Guide
深圳德标仪器 135-1095-0799

Notices
© Agilent Technologies, Inc. 2006, 2011,
2012, 2013, 2017
No part of this manual may be reproduced
in any form or by any means (including
electronic storage and retrieval or transla-
tion into a foreign language) without prior
agreement and written consent from 
Agilent Technologies, Inc. as governed 
by United States and international copy-
right laws.
Manual Part Number
34980-90010
Edition
Seventh Edition, November 2017
Printed in Malaysia
Agilent Technologies, Inc.
3501 Stevens Creek Blvd
Santa Clara, CA 95052 USA
Microsoft and Windows are U.S. regis-
tered trademarks of Microsoft Corpora-
tion.
Software Revision
This guide is valid for the firmware that
was installed in the instrument at the time
of manufacture. However, upgrading the
firmware may add or change product 
features. For the latest firmware and 
documentation, go to the product page at:
www.agilent.com/find/34980A
Warranty
The material contained in this doc-
ument is provided “as is,” and is
subject to being changed, without
notice, in future editions. Further,
to the maximum extent permitted
by applicable law, Agilent disclaims
all warranties, either express or
implied, with regard to this manual
and any information contained
herein, including but not limited to
the implied warranties of mer-
chantability and fitness for a par-
ticular purpose. Agilent shall not
be liable for errors or for incidental
or consequential damages in con-
nection with the furnishing, use, or
performance of this document or of
any information contained herein.
Should Agilent and the user have a
separate written agreement with
warranty terms covering the mate-
rial in this document that conflict
with these terms, the warranty
terms in the separate agreement
shall control.
Technology Licenses
The hardware and/or software described
in this document are furnished under a
license and may be used or copied only in
accordance with the terms of such license.
Restricted Rights Legend
U.S. Government Restricted Rights. 
Software and technical data rights granted
to the federal government include only
those rights customarily provided to end
user customers. Agilent provides this 
customary commercial license in Soft-
ware and technical data pursuant to FAR
12.211 (Technical Data) and 12.212
(Computer Software) and, for the Depart-
ment of Defense, DFARS 252.227-7015
(Technical Data - Commercial Items) and
DFARS 227.7202-3 (Rights in Commer-
cial Computer Software or Computer
Software 
Documentation).
Safety Notices
CAUTION
A CAUTION notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly per-
formed or adhered to, could result
in damage to the product or loss of
important data. Do not proceed
beyond a CAUTION notice until
the indicated conditions are fully
understood and met.
WARNING
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice,
or the like that, if not correctly
performed or adhered to, could
result in personal injury or
death. Do not proceed beyond a
WARNING notice until the indi-
cated conditions are fully
understood and met.
i
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Additional Safety Notices
The following general safety precautions
must be observed during all phases of
operation of this instrument. Failure to
comply with these precautions or with
specific warnings or instructions else-
where in this manual violates safety stan-
dards of design, manufacture, and
intended use of the instrument. Agilent
Technologies assumes no liability of the
customer’s failure to comply with the
requirements.
General
Do not use this products in any manner
not specified by the manufacturer. The
protective features of this product may be
impaired if it is used in a manner not
specified in the operation instructions.
Before Applying Power
Verify that all safety precautions are
taken. Make all connections to the unit
before applying power.
Ground the Instrument
This product is provided with protective
earth terminals. To minimize shock haz-
ard, the instrument must be connected to
the ac power mains through a grounded
power cable, with the ground wire firmly
connected to an electrical ground (safety
ground) at the power outlet. Any interrup-
tion of the protective (grounding) conduc-
tor or disconnection of the protective
earth terminal will cause a potential shock
hazard that could result in personal injury.
Do Not Operate in an
Explosive Atmosphere
Do not operate the instrument in the pres-
ence of flammable gases or fumes.
Do Not Remove the
Instrument Cover
Only qualified, service-trained personal
who are aware of the hazards involved
should remove instrument covers. Always
disconnect the power cable and any exter-
nal circuits before removing the instru-
ment cover.
Do Not Modify the
Instrument
Do not install substitute parts or perform
any unauthorized modification to the
product. Return the product to an Agilent
Sales and Service Office for service and
repair to ensure that safety features are
maintained.
In Case of Damage
Instruments that appear damaged or
defective should be made inoperative and
secured against unintended operation
until they can be repaired by qualified ser-
vice personnel.
Safety Symbols
Waste Electrical and
Electronic Equipment
(WEEE) Directive
2002/96/EC
This product complies with the WEEE
Directive (2002/96/EC) marking require-
ment. The affixed product label (see
above) indicates that you must not dis-
card this electrical/electronic product
in domestic household waste.
Product Category: With reference to the
equipment types in the WEEE directive
Annex 1, this product is classified as a
“Monitoring and Control instrumenta-
tion” product.
To return unwanted products, contact 
your local Agilent office, or go to 
www.agilent.com/environment/product
for more information.
Technical Support
If you have questions about your ship-
ment, or if you need information about
warranty, service, or technical support,
contact 
Agilent Technologies:
In the United States: [phone]
In Europe: 31 20 547 2111
In Japan: 0120-421-345
Or go to www.agilent.com/find/assist 
for information on contacting Agilent in
your country of specific location. You can
also contact your Agilent Technologies 
Representative.
Alternating current
Frame or chassis
terminal
Standby supply. Unit is
not completely
disconnected from ac
mains when switch is off
Caution, risk of
electric shock
Caution, refer to
accompanying
ii
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iii
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34980A Service Guide iv
Front Panel at a Glance
1On/Standby switch
2Utility menu contains settings for Remote I/O (LAN, GPIB, and USB), Date and Time, and other
system-related instrument parameters
3Store/recall menu allows you to save and recall up to six instrument setups
4Control keys directly control module actions
5Number keypad enters numerical characters
6Exponent
7Cancel key exits a menu without saving changes
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v34980A Service Guide
8Arrow keys move cursor positions
9Knob enters alphanumeric characters, selects slots, channels, and navigates menus
10 Enter key steps you through a menu or saves number entries
11 Running a program puts the display into “remote” and disables the front panel keys. Local takes you out
of “remote” mode and enables the front panel keys.
12 Configure keys select functions and set function parameters
13 Measure keys execute and monitor measurements. Depending on which measurement key you use, you
can have complete/direct control over the switching and measurement operation, or you can have the
34980A automatically control these to capture the desired data.
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34980A Service Guide vi
Rear Panel at a Glance
1Access to Analog Buses (shown with cover installed). For pinout, see page vii.
2Module installed in slot 1
3Slot identifier
4Module ground screw
5Slot cover over slot 2
6AC power connector
7LAN connector (10Base T/100Base Tx)
8USB 2.0 connector
9External trigger input. For pinout, see page vii.
10 Internal DMM option mark. If you ordered the internal DMM option, the circle is marked
black.
11 IEEE 488.2 GPIB Connector
12 Chassis ground screw
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vii 34980A Service Guide
Rear Panel Connector Pinouts
External Trigger/Alarms Connector (Male D-Sub)
Analog Bus Connector (Female D-Sub)
Ext Trig Input /
Chan Adv Input (Pin 6)
Gnd (Pin 9)
1
5
6
9
Chan Closed Output /
VM Comp Output (Pin 5)
Input
5 V
0 V
> 1 μs
Output
3.3 V
0 V
Approx. 2 μs
Alarm 4 Output (Pin 4)
Alarm 3 Output (Pin 3)
Alarm 2 Output (Pin 2)
Alarm 1 Output (Pin 1)
or
Gnd (Pin 9)
ANALOG
BUSSES
Internal DMM Current Input I(Pin 5)
ABus1 LO (Pin 4)
ABus2 LO (Pin 3)
ABus3 LO (Pin 2)
ABus4 LO (Pin 1)
5
1
9
6
ABus1 HI (Pin 9)
ABus2 HI (Pin 8)
ABus3 HI (Pin 7)
ABus4 HI (Pin 6)
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34980A Service Guide viii
Annunciator Display Indicators
Display Indicator Definition
LAN Communicating with the 34980A over LAN.
USB Communicating with the 34980A over USB.
GPIB Communicating with the 34980A over GPIB.
ABUS [1234] Analog Bus Connectivity. Normally, designated ABus connected on any module in mainframe.
During scan, if ABus 1 and ABus 2 are indicated, they will be used at some point during the
scan.
An error has been generated and is in the error queue.
Rmt Remote. Running a program puts the display into “remote” and disables the front panel keys.
Pressing the LOCAL button takes you out of “remote” mode and enables the front panel keys.
Safety Interlock ABus Safety Interlock. Terminal block or cables have been removed from the D-sub connector of
a module. For more information, see the Agilent 34980A User’s Guide.
Trig Waiting for external or manual trigger during scans.
Over-temperature condition. One or more general purpose (34937A/34938A) modules have
reached their over-temperature limits.
ALARM (H1234L) HI or LO alarm condition has occurred on the indicated alarms.
Alarms are enabled on the displayed channel.
Mx+B Scaling enabled on channel. This appears on display after you select scaling function via front
panel or remote interface.
4W 4-wire measurement specified on channel. This appears on display after you select the 4-wire
function via the front panel or remote interface.
OC Offset Compensation specified on channel. This appears on display after you have selected the
offset compensation function via the front panel or remote interface.
*Measurement is in progress.
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ix 34980A Service Guide
Front Panel Menu Reference
This section gives an overview of the top two levels of menus that you access from the
front panel. The menus are designed to automatically guide you through all parameters
required to configure a particular function or operation.
Store/Recall Store and recall instrument states
•Store up to six instrument states in non-volatile memory
•Assign a name to each storage location.
•Recall stored states, power-down state, factory reset state, or preset state
Utility Configure system-related instrument parameters
•Connecting and configuring to use with LAN, GPIB, or USB
•Set the real time clock and calendar
•Set radix character, thousand separator
•Enable/disable the internal DMM
•Query and update the firmware revisions for the mainframe and modules
Configure Key Group Set parameters for measurement
DMM
•Set DMM measurement function (AC volts, DC volts, AC current, DC current, 2-wire ohms, 4-wire ohms,
temperature, frequency, and period)
•Set function parameters
Channel
•Set channel measurement function (AC volts, DC volts, AC current (34921A only), DC current (34921A
only) 2-wire ohms, 4-wire ohms, temperature, frequency, and period)
•Set function parameters
Scan
•Set up trigger-in parameters
•Set up sweep count
•Set up sample count
Sequence
•View sequence command string
•Execute sequence
•Delete sequence definitions
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34980A Service Guide x
Module
•Open all relays
•Clear all measurement functions
•Clear channel labels
•Configure external trigger and clock (34951A)
•Set trace or level mode (34951A)
•Set waveform parameters (34951A)
View
•View errors and alarms
Advanced
Available at a later firmware release
Alarm
•Select one of four alarms to report alarm conditions on the displayed channel
•Configure a high limit, a low limit, or both for the displayed channel
•Select the slope (rising or falling edge) for the four alarm output lines
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xi 34980A Service Guide
Instrument Rack Mounting
Using the optional Agilent Y1130A Rack Mount Kit, you can mount the 34980A in a
standard 19-inch rack cabinet. This kit includes rack mount brackets and associated
hardware required to forward or reverse mount the instrument in the rack cabinet.
•For forward rack mounting (34980A front panel facing the front of 
the cabinet), use the Agilent standard rack mount kit (part number 5063-9214). For
Agilent rack cabinets, use the E3663A Basic Rail Kit (sold separately).
•For reverse rack mounting (34980A rear panel facing the front of 
the cabinet), use the longer brackets (see figure below) with the hardware for the
standard rack mount kit. For Agilent rack cabinets, use the E3664AC Third Party
Rail Kit (sold separately).
Reverse Rack Mount Orientation (longer brackets used)
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34980A Service Guide xii
Agilent 34980A Dimensions (shown with Reverse Rack Mount brackets installed)
367.7 mm (14.48 in)
101.9 mm (4.01 in)
or
70.4 mm (2.78 in)
425.6 mm (16.76 in)
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xiii 34980A Service Guide
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34980A Service Guide 1
Contents
Front Panel at a Glance iii
Rear Panel at a Glance iv
Rear Panel Connector Pinouts v
Annunciator Display Indicators vi
Front Panel Menu Reference vii
Instrument Rack Mounting vii
1 Obtaining Service
Operating Checklist 6
Types of Service Available 6
Repackaging for Shipment 7
Cleaning 7
Self Test Procedures 8
Electrostatic Discharge (ESD) Precautions 9
2 Specifications
Multiplexer Module Specifications and Characteristics 12
Matrix Modules Specifications and Characteristics 14
GP Actuator Module Specifications and Characteristics 16
RF and Microwave Module Specifications and Characteristics 17
34945A/34945EXT Module Specifications and Characteristics 19
34950A 64-channel Digital I/O Specifications and Characteristics 20
34951A 4-channel D/A Converter Specifications and Characteristics 22
34952A Multifunction Module Specifications and Characteristics 24
34959A Breadboard Module Specifications and Characteristics 25
Internal DMM Specifications and Characteristics 26
Typical System Speeds 29
Internal DMM Measurement Characteristics 31
System Specifications and Characteristics 35
Product Dimensions 37
To Calculate Total DMM Measurement Error 38
Interpreting Internal DMM Specifications 40
Configuring for Highest Accuracy Measurements 42
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234980A Service Guide
3 Calibration Procedures
Agilent Technologies Calibration Services 44
Calibration Interval 44
Adjustment is Recommended 44
Time Required for Calibration 45
Automating Calibration Procedures 45
Recommended Test Equipment 46
Calibration Security 47
Calibration Message 48
Calibration Count 48
Calibration Process 49
Aborting a Calibration in Progress 49
Performance Verification Tests 50
Input Connections 52
DMM Test Considerations 53
Internal DMM Verification Tests 53
Optional AC Performance Verification Tests 59
Internal DMM Adjustments 60
Gain Adjustment 63
Plug-in Module Test Considerations 65
34951A 4-Ch Isolated DAC Module 66
34952A Multifunction Module 71
Relay Plug-in Modules 73
Thermocouple Reference Junction 34921A (Optional) 75
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34980A Service Guide 3
4 Troubleshooting and Diagnostics
Troubleshooting Hints 78
Power Supply 79
Product Firmware Updates 81
Instrument Errors 82
Error Numbers 84
Isolate a Problem with a Plug-In Module 90
Relay and FET Replacement 91
34921A 40-Channel Armature Multiplexer with Low Thermal Offset 92
34922A 70-Channel Armature Multiplexer 94
34923A 40/80-Channel Reed Multiplexer 96
34924A 70-Channel Reed Multiplexer 98
34925A 40/80-Channel Optically-Isolated FET Multiplexer 100
34931A Dual 4x8 Armature Matrix 102
34932A Dual 4x16 Armature Matrix 104
34933A Dual/Quad 4x8 Reed Matrix 107
34937A 32-Channel GP Switch 111
34938A 20-Channel High-Current GP Switch 112
5 Disassembly and Repair
Electrostatic Discharge (ESD) Precautions 114
Surface Mount Repair 114
Tools Required 114
Basic Disassembly 115
Power Supply Removal 116
Power Supply Disassembly 117
KOM Removal 118
Front Panel Removal 119
Front Panel Disassembly 120
DMM Removal 121
Backplane Removal 122
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434980A Service Guide
6 Replaceable Parts
To Order Replaceable Parts 124
Backdating and Part Changes 124
Mainframe Replaceable Parts 125
34921A Replaceable Parts 126
34922A Replaceable Parts 126
34923A Replaceable Parts 127
34924A Replaceable Parts 127
34925A Replaceable Parts 127
34931A Replaceable Parts 128
34932A Replaceable Parts 129
34933A Replaceable Parts 130
34937A Replaceable Parts 130
34938A Replaceable Parts 130
34946A and 34947A Replaceable Parts 133
Vendor Addresses 131
7 Backdating
8 Diagrams
34921A Component Locator 136
34922A Component Locator 137
34923A Component Locator 138
34924A Component Locator 139
34925A Component Locator (Top) 140
34925A Component Locator (Bottom) 141
34931A Component Locator 142
34932A Component Locator 143
34933A Component Locator 144
34937A Component Locator 145
34938A Component Locator 146
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