Keysight 53210A, 53220A, 53230A Service Guide
Keysight 53210A/53220A/
53230A 350 MHz Universal
Frequency Counter/Timer
Assembly Level
Service Guide
Notices
Copyright Notice
© Keysight Technologies 2011–2020
No part of this manual may be repro-
duced in any form or by any means
(including electronic storage and
retrieval or translation into a foreign
language) without prior agreement and
written consent from Keysight Technologies as governed by United States and
international copyright laws.
Trademarks
Microsoft and Windows are U.S.
registered trademarks of Microsoft
Corporation.
Manual Part Number
53220-90010
Edition
Edition 9, December 2020
Printed in:
Printed in Malaysia
Published by:
Keysight Technologies
Bayan Lepas Free Industrial Zone,
11900 Penang, Malaysia
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.
Declaration of Conformity
Declarations of Conformity for this
product and for other Keysight products may be downloaded from the
Web. Go to http://www.keysight.com/
go/conformity. You can then search by
product number to find the latest Declaration of Conformity.
U.S. Government Rights
The Software is “commercial computer
software,” as defined by Federal Acquisition Regulation (“FAR”) 2.101. Pursuant to FAR 12.212 and 27.405-3 and
Department of Defense FAR Supplement (“DFARS”) 227.7202, the U.S.
government acquires commercial computer software under the same terms
by which the software is customarily
provided to the public. Accordingly,
Keysight provides the Software to U.S.
government customers under its standard commercial license, which is
embodied in its End User License
Agreement (EULA), a copy of which can
be found at http://www.keysight.com/
find/sweula. The license set forth in the
EULA represents the exclusive authority
by which the U.S. government may use,
modify, distribute, or disclose the Software. The EULA and the license set
forth therein, does not require or permit, among other things, that Keysight:
(1) Furnish technical information
related to commercial computer software or commercial computer software
documentation that is not customarily
provided to the public; or (2) Relinquish
to, or otherwise provide, the government rights in excess of these rights
customarily provided to the public to
use, modify, reproduce, release, perform, display, or disclose commercial
computer software or commercial computer software documentation. No
additional government requirements
beyond those set forth in the EULA
shall apply, except to the extent that
those terms, rights, or licenses are
explicitly required from all providers of
commercial computer software pursuant to the FAR and the DFARS and are
set forth specifically in writing elsewhere in the EULA. Keysight shall be
under no obligation to update, revise or
otherwise modify the Software. With
respect to any technical data as
defined by FAR 2.101, pursuant to FAR
12.211 and 27.404.2 and DFARS
227.7102, the U.S. government
acquires no greater than Limited Rights
as defined in FAR 27.401 or DFAR
227.7103-5 (c), as applicable in any
technical data.
Warranty
THE MATERIAL CONTAINED IN THIS
DOCUMENT IS PROVIDED “AS IS,”
AND IS SUBJECT TO BEING
CHANGED, WITHOUT NOTICE, IN
FUTURE EDITIONS. FURTHER, TO THE
MAXIMUM EXTENT PERMITTED BY
APPLICABLE LAW, KEYSIGHT 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 MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. KEYSIGHT
SHALL NOT BE LIABLE FOR ERRORS
OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION
WITH THE FURNISHING, USE, OR
PERFORMANCE OF THIS DOCUMENT
OR OF ANY INFORMATION CONTAINED HEREIN. SHOULD KEYSIGHT
AND THE USER HAVE A SEPARATE
WRITTEN AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT
CONFLICT WITH THESE TERMS, THE
WARRANTY TERMS IN THE SEPARATE
AGREEMENT SHALL CONTROL.
Safety Information
CAUTION
A CAUTION 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 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 indicated conditions are
fully understood and met.
2 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Software Updates/Licenses
Periodically, Keysight releases software updates to fix known defects and
incorporate product enhancements. To search for software updates and the latest
documentation for your product, go to the product page at:
www.keysight.com/find/53210A
www.keysight.com/find/53220A
www.keysight.com/find/53230A
A portion of the software in this product is licensed under terms of the General
Public License Version 2 (“GPLv2”). The text of the license and source code can be
found at:
www.keysight.com/find/GPLV2
This product utilizes Microsoft Windows CE. Keysight highly recommends that all
Windows-based computers connected to Windows CE instruments utilize current
anti-virus software. For more information, go to the product page at:
www.keysight.com/find/53210A
www.keysight.com/find/53220A
www.keysight.com/find/53230A
Keysight 53210A/53220A/53230A Assembly Level Service Guide 3
Assistance
This product comes with the standard product warranty. Warranty options,
extended support contacts, product maintenance agreements and customer
assistance agreements are also available. Contact your nearest Keysight
Technologies Sales and Service office for further information on Keysight
Technologies' full line of Support Programs.
Certification
Keysight Technologies certifies that this product met its published specifications
at time of shipment from the factory. Keysight Technologies further certifies that
its calibration measurements are traceable to the United States National Institute
of Standards and Technology, to the extent allowed by the Institute's calibration
facility, and to the calibration facilities of other International Standards
Organization members.
Exclusive Remedies
The remedies provided herein are the customer's sole and exclusive remedies.
Keysight Technologies shall not be liable for any direct, indirect, special,
incidental, or consequential damages, whether based on contract, tort, or any
other legal theory.
4 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Lithium Battery Recycling
The 53210A/53220A/53230A counters contain a 3 V “coin cell” lithium battery.
Keysight recommends that this battery be replaced every year at the instrument’s
1-year calibration interval. Replacement procedures are provided in the 53210A/
53220A/53230A Service Guide.
Option 300 provides battery operation of the 53210A/53220A/53230A using a 12
lithium battery. Performance of this battery will degrade over time as a function of
the number of battery charge/discharge cycles.
Refer to local, state, or Federal regulations when disposing of, or recycling either
battery.
Safety Symbols
The following symbols on the instrument and in the documentation indicate
precautions which must be taken to maintain safe operation of the instrument.
Standby Power. Unit is not completely
disconnected from AC mains when
power switch is in standby position.
Frame or chassis (ground) terminal
Caution, risk of danger (refer to this
manual for specific Warning or Caution
information)
Keysight 53210A/53220A/53230A Assembly Level Service Guide 5
CAT I
IEC Measurement Category I. Do NOT
connect inputs to AC mains or to
circuits derived from AC mains.
Safety Information
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 operating instructions in the product manuals violates safety
standards of design, manufacture, and intended use of the instrument. Keysight
Technologies assumes no liability for the customer's failure to comply with these
requirements.
General
Do not use this product 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. Note the instrument's external
markings described under "Safety Symbols".
Ground the instrument
The Keysight 53210A/53220A/53230A is provided with a grounding-type power
plug. The instrument chassis and cover must be connected to an electrical ground
to minimize shock hazard. The ground pin must be firmly connected to an
electrical ground (safety ground) terminal at the power outlet. Any interruption of
the protective (grounding) conductor or disconnection of the protective earth
terminal will cause a potential shock hazard that could result in personal injury.
Fuses
The Keysight 53210A/53220A/53230A is provided with an internal line fuse
appropriate for the line voltages listed on the instrument. This fuse is not user
accessible.
6 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Do not operate in an explosive atmosphere
Do not operate the instrument in the presence of flammable gases or fumes.
Do not operate near flammable liquids
Do not operate the instrument in the presence of flammable liquids or near
containers of such liquids.
Do not remove the instrument cover
Only qualified, service-trained personnel who are aware of the hazards involved
should remove instrument covers. Always disconnect the power cable and any
external circuits before removing the instrument cover.
Do not modify the instrument
Do not install substitute parts or perform any unauthorized modification to the
product. Return the product to a Keysight 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
service personnel.
Cleaning the instrument
Clean the outside of the instrument with a soft, lint-free, slightly-dampened cloth.
Do not use detergents or chemical solvents.
Keysight 53210A/53220A/53230A Assembly Level Service Guide 7
WARNING
Do not connect the input channels of the 53210A/53220A/53230A to AC
line-voltage mains or to circuits derived from AC mains. The instrument
must be used in CAT I (isolated from mains) applications only. Do not use in
other IEC Measurement Category (CAT II, CAT III, or CAT IV) applications.
Failure to observe these precautions may result in electric shock and serious
personal injury.
WARNING
Protection limits
WARNING
The BNC shells of the input terminals are connected to the instrument
chassis. Verify signal polarity before making any connections to the input
terminals.
The Keysight 53210A/53220A/53230A 350 MHz Universal Frequency Counter/
Timer provides protection circuitry to prevent damage to the instrument and to
protect against the danger of electric shock, provided the Protection Limits are
not exceeded and the instrument is properly grounded. To ensure safe operation
of the instrument, do not exceed the Protection Limits defined on the front panel:
During battery operation, the maximum measured signal supplied by the
user is +42 V.
WARNING
8 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Product Options 201/202 add parallel Channel 1 and Channel 2 inputs to the
rear panel of the instrument. Signals on the center conductor of either
panel’s channel BNCs are also present on the corresponding center
conductor of the BNC on the opposite panel.
Installing the instrument
The Keysight 53210A/53220A/53230A operates in the following line-voltage
ranges:
100 V to 240 V, 50 Hz to 60 Hz
100 V to 127 V, 440 Hz
90 VA Max
Instrument ventilation is through the sides and rear. Do not obstruct the
ventilation holes in any of these locations.
Battery operation
When operating the 53210A or 53220A under battery power (Option 300), failure
to observe the following warnings may result in damage to the instrument,
electric shock, and serious personal injury:
WARNING
WARNING
Keysight 53210A/53220A/53230A Assembly Level Service Guide 9
Connect the instrument chassis to earth ground during battery operation to
minimize shock hazard. Any interruption or disconnection of the protective
earth terminal will cause a potential shock hazard that could result in
personal injury.
Under battery power, the instrument chassis may float to the potential of the
measured signal supplied by the user.
Waste Electrical and Electronic Equipment (WEEE) Directive
This instrument complies with the WEEE Directive marking requirement. This
affixed product label indicates that you must not discard this electrical or
electronic product in domestic household waste.
Product category:
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.
Do not dispose in domestic household waste.
To return this unwanted instrument, contact your nearest Keysight Service Center,
or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml
for more information.
Sales and Technical Support
To contact Keysight for sales and technical support, refer to the support links on
the following Keysight websites:
– www.keysight.com/find/53210A
www.keysight.com/find/53220A
www.keysight.com/find/53220A
(product-specific information and support, software and
documentation updates)
– www.keysight.com/find/assist
(worldwide contact information for repair and service)
10 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Table of Contents
Software Updates/Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Exclusive Remedies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Lithium Battery Recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Before applying power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Ground the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Do not operate in an explosive atmosphere . . . . . . . . . . . . . . . . . . . .7
Do not operate near flammable liquids . . . . . . . . . . . . . . . . . . . . . . . .7
Do not remove the instrument cover . . . . . . . . . . . . . . . . . . . . . . . . .7
Do not modify the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
In case of damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Cleaning the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Protection limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Installing the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Battery operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Waste Electrical and Electronic Equipment (WEEE) Directive . . . . . . .10
Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
1 Performance Tests
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Chapter overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Recommended calibration cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Internal auto-calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Equipment required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Power-On Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Keysight 53210A/53220A/53230A Assembly Level Service Guide 11
Self-Test (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Run internal self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Keysight 53210A/53220A/53230A Operational Verification . . . . . . . . . 33
Frequency checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Termination checks (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Keysight 53210A/53220A/53230A Complete Performance Tests . . . . 37
Test 1: (Q) Absolute time base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Test 2: (Q) Frequency accuracy - channels 1 and 2 . . . . . . . . . . . . . 44
Test 3: Single period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Test 4: (Q) Pulse width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Test 5: (Q) Time interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Test 6a: (Q) Frequency accuracy - channel 2/3, option 106
(6 GHz microwave channel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Test 6b: (Q) Frequency accuracy - channel 2/3, option 115
(15 GHz microwave channel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Test 7a: (Q) Pulse burst frequency - 53230A channel 3 option 150 with
option 106 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Test 7c: (Q) Pulse burst frequency - 53230A channel 3 option 150 with
option 115 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Keysight 53210A/53220A/53230A Operational Verification and Perfor-
mance Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Keysight 53210A/53220A/53230A Performance Test Record
(Tests 1 to 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
2 Service
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Returning the counter to Keysight Technologies for service . . . . .102
About the Keysight 53210A/53220A/53230A calibration menu . . 102
The Keysight 53210A/53220A/53230A calibration procedures . . . 102
Pre-troubleshooting information . . . . . . . . . . . . . . . . . . . . . . . . . .102
Troubleshooting information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Returning the Instrument to Keysight Technologies for Service . . . .106
Operating checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Is the instrument inoperative? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
12 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Does the instrument fail self-test? . . . . . . . . . . . . . . . . . . . . . . . . .106
Types of service available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
Extended service contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
Obtaining repair service (worldwide) . . . . . . . . . . . . . . . . . . . . . . . .107
To provide repair information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
To pack in the original packaging materials . . . . . . . . . . . . . . . . . .109
To pack in commercially available materials . . . . . . . . . . . . . . . . . .109
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
About the Keysight 53210A/53220A/53230A Calibration Menu . . . .111
Overview of the Keysight 53210A/53220A/53230A calibration menu .
111
To get help with the calibration menu functions . . . . . . . . . . . . . .113
To view the calibration menu and security status from the counter front
panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115
To lock the counter against calibration . . . . . . . . . . . . . . . . . . . . . .116
To unlock the counter for calibration: . . . . . . . . . . . . . . . . . . . . . . .118
To change to a new security code . . . . . . . . . . . . . . . . . . . . . . . . . .119
The Keysight 53210A/53220A/53230A Calibration Procedures . . . . .120
Equipment required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120
Determine the counter firmware version . . . . . . . . . . . . . . . . . . . . .121
Calibration cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123
Calibration string: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123
Internal reference oscillator calibration . . . . . . . . . . . . . . . . . . . . .123
Summary of oscillator calibration procedure: . . . . . . . . . . . . . . . . .128
Remote oscillator calibration summary: . . . . . . . . . . . . . . . . . . . . .128
Voltage calibration (internal DACs) . . . . . . . . . . . . . . . . . . . . . . . . .129
Option 106 microwave channel frequency calibration . . . . . . . . . .135
Option 115 microwave channel frequency calibration . . . . . . . . . .142
Internal auto-calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149
To view the calibration count . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152
Resetting the security code to a null . . . . . . . . . . . . . . . . . . . . . . . .153
Pre-Troubleshooting Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154
Safety considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154
Recommended test equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . .155
Repair considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .156
Keysight 53210A/53220A/53230A Assembly Level Service Guide 13
After service considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Troubleshooting the Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Unit is inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Unit fails self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Power supply check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Checking the battery and battery charger . . . . . . . . . . . . . . . . . . . 166
Performing the counter self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
To determine the counter firmware version . . . . . . . . . . . . . . . . . . 172
Reseat the boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
Re-run the counter self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Command errors (-100...) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Execution errors (-200...) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Hardware errors (-240, -241, -250...) . . . . . . . . . . . . . . . . . . . . . . . 177
Device-specific errors (-300..., +800) . . . . . . . . . . . . . . . . . . . . . . . 178
Query errors (-400...) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Calibration errors (700...) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Self-test errors (901...) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180
3 Replacing Assemblies
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Do this first . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .185
Electrostatic discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
To Remove the Cover and Rear Bezel . . . . . . . . . . . . . . . . . . . . . . . . .187
To Remove the Internal DC Battery Assembly (Option 300) . . . . . . . . 189
To Remove the GPIB Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
To Remove a 6.0 GHz or 15.0 GHz Microwave Channel Assembly (Options
106/115) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Re-installing the microwave channel assembly . . . . . . . . . . . . . . . 192
To Remove the Processor Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
To Remove the Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . .196
To remove the display assembly from the front panel . . . . . . . . . . 199
14 Keysight 53210A/53220A/53230A Assembly Level Service Guide
To Remove the Motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200
To Remove the AC Power Supply Assembly . . . . . . . . . . . . . . . . . . . .201
4 Retrofitting Options
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204
Tools required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204
Do This first . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205
To Retrofit Ultra-High Stability Timebase (Option 010) . . . . . . . . . . .206
To Retrofit the GPIB Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .207
GPIB connector parts (P/N 53200U-400) . . . . . . . . . . . . . . . . . . . .207
Preliminary steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .207
GPIB connector installation procedure . . . . . . . . . . . . . . . . . . . . . .208
To Retrofit the Internal Battery DC Power (Option 300) . . . . . . . . . . .209
Option 300 DC power input assembly parts . . . . . . . . . . . . . . . . . .209
Preliminary steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .209
Battery assembly installation procedure . . . . . . . . . . . . . . . . . . . . .210
To Retrofit the 53210A (Channel 1) or 53220A/53230A
(Channels 1/2) Rear Panel Inputs (Option 201) . . . . . . . . . . . . . . .215
Option 201 rear panel channel 1/2 parts . . . . . . . . . . . . . . . . . . . .215
Preliminary steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215
Channels 1/2 rear panel retrofit procedure . . . . . . . . . . . . . . . . . .217
To Retrofit the 53210A Channel 2 Front Panel Input
(Option 106 or Option 115, plus Front Panel Option 202) . . . . . . .219
Option 106/115 channel 2 parts . . . . . . . . . . . . . . . . . . . . . . . . . . .219
Option 202 front panel channel 2 parts . . . . . . . . . . . . . . . . . . . . .219
Preliminary steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220
Channel 2 front panel retrofit procedure (53210A) . . . . . . . . . . . .222
To Retrofit the 53210A Channel 2 Rear Panel Input, 6.0 GHz (Option 106)
or 15.0 GHz (Option 115) plus Rear Panel Option 203 . . . . . . . . . .229
Option 106/115 channel 2 parts . . . . . . . . . . . . . . . . . . . . . . . . . . .229
Option 203 rear panel channel 2 parts . . . . . . . . . . . . . . . . . . . . . .229
Preliminary steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .230
Channel 2 rear panel retrofit procedure (53210A) . . . . . . . . . . . . .232
Keysight 53210A/53220A/53230A Assembly Level Service Guide 15
To Retrofit the 53220A/53230A Channel 3 Input, 6.0 GHz
(Option 106) or 15.0 GHz (Option 115) plus Front panel option 202 .
234
Option 202 front panel channel 3 parts . . . . . . . . . . . . . . . . . . . . . 234
Preliminary steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .235
Front panel installation procedure (Option 202 only) . . . . . . . . . .237
To Retrofit the 53220A/53230A Channel 3 Input, 6.0 GHz
(Option 106) or 15.0 GHz (Option 115) plus Rear Panel Option 203 . .
244
Option 203 rear panel channel 3 parts . . . . . . . . . . . . . . . . . . . . . .244
Preliminary steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245
Rear panel installation procedure (Option 203 only) . . . . . . . . . . . 247
To Retrofit Option 150 (Pulse Microwave Measurements) for the 53230A
249
Retrofitting procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
5 Replaceable Parts
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .252
Contacting Keysight Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . .253
By telephone (in the United States): . . . . . . . . . . . . . . . . . . . . . . . . 253
For mail correspondence, use the address below: . . . . . . . . . . . . . 253
How To Order A Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .254
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256
6 Backdating
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .262
Serial numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Backdating Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .264
To determine the counter firmware version . . . . . . . . . . . . . . . . . . 264
Procedure Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Information concerning Option 106 “Microwave Input”, FW Rev (27.0)
266
16 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Option 106 microwave channel frequency calibration . . . . . . . . . .266
Backdating Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .273
Backdating Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .274
Keysight 53210A/53220A/53230A Assembly Level Service Guide 17
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
18 Keysight 53210A/53220A/53230A Assembly Level Service Guide
List of Figures
Figure 1-1 Operational verification setup for Keysight 53210A/220A/
Figure 1-2 Termination Check Setup . . . . . . . . . . . . . . . . . . . . . . .35
Figure 1-3 Absolute timebase test setup . . . . . . . . . . . . . . . . . . .39
Figure 1-4 Test setup for channel 1/2 frequency accuracy tests .44
Figure 1-5 Test Setup for Single Period . . . . . . . . . . . . . . . . . . . .51
Figure 1-6 Pulse width test setup . . . . . . . . . . . . . . . . . . . . . . . . .57
Figure 1-7 Time interval (channel 1 to 2) test setup . . . . . . . . . . .62
Figure 1-8 Option 106 ( 6 GHz ) microwave channel 2/3 test setup
Figure 1-9 Option 115 ( 15 GHz ) microwave channel 2/3 test setup
Figure 1-10 Option 106/150 microwave channel 3 test setup . . . .79
Figure 1-11 Option 115/150 microwave channel 3 test setup . . . .85
Figure 2-1 The front panel at a glance . . . . . . . . . . . . . . . . . . . .103
Figure 2-2 Front panel display . . . . . . . . . . . . . . . . . . . . . . . . . . .104
Figure 2-3 Calibration procedure summary . . . . . . . . . . . . . . . .114
Figure 2-4 Information screen . . . . . . . . . . . . . . . . . . . . . . . . . . .122
Figure 2-5 Oscillator calibration setup . . . . . . . . . . . . . . . . . . . .124
Figure 2-6 DC voltage source and DMM connections . . . . . . . .132
Figure 2-7 Microwave source connection to Channel 3 . . . . . . .135
Figure 2-8 Microwave source connection to Channel 3 . . . . . . .143
Figure 2-9 Counter top internal view . . . . . . . . . . . . . . . . . . . . . .160
Figure 2-10 Bottom internal view . . . . . . . . . . . . . . . . . . . . . . . . .161
Figure 2-11 ac Power Supply Testpoint Locations on the Motherboard
Figure 2-12 Battery folded in the service position . . . . . . . . . . . .167
Figure 2-13 Test Button and Charge Indicator . . . . . . . . . . . . . . .168
Figure 3-1 Handle removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187
Figure 3-2 Rear Bezel And Cover Removal . . . . . . . . . . . . . . . . .188
Figure 3-3 Battery assembly temporary position for service or
Figure 3-4 Top view of counter showing GPIB assembly . . . . . .191
230A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
67
73
assembly (top view, internal battery removed, test
points visible.) . . . . . . . . . . . . . . . . . . . . . . . . . . . .164
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190
Keysight 53210A/53220A/53230A Assembly Level Service Guide 19
Figure 3-5 Front flange resting on plastic tab . . . . . . . . . . . . . . 193
Figure 3-6 Processor PC board . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Figure 3-7 Front rubber bumper removal . . . . . . . . . . . . . . . . . . 196
Figure 3-8 Front panel removal . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Figure 4-1 Connector Locking Tab . . . . . . . . . . . . . . . . . . . . . . . 210
Figure 4-2 Jumper cable installed . . . . . . . . . . . . . . . . . . . . . . .211
Figure 4-3 Digital and Y-cables. . . . . . . . . . . . . . . . . . . . . . . . . . 212
Figure 4-4 Test button and charge indicator . . . . . . . . . . . . . . .212
Figure 4-5 Battery assembly connectors . . . . . . . . . . . . . . . . . . 213
Figure 4-6 Battery assembly held by three small tabs . . . . . . . . 214
Figure 4-7 Option 201 rear input channels 1 and 2 . . . . . . . . . . 217
Figure 4-8 53210A channel 2 front panel Option 106/202 . . . . 221
Figure 4-9 Processor printed circuit board . . . . . . . . . . . . . . . . .222
Figure 4-10 T20 TORX screw on motherboard . . . . . . . . . . . . . . . 223
Figure 4-11 Connector-adapter installation . . . . . . . . . . . . . . . . . 224
Figure 4-12 Semi-rigid cable position . . . . . . . . . . . . . . . . . . . . . . 225
Figure 4-13 Front flange resting on plastic tab . . . . . . . . . . . . . . 227
Figure 4-14 53210A channel 2 rear panel Option 106/203 . . . . . 231
Figure 4-15 Channel 2 assembly installed on top of the motherboard,
with the SMA edge connector pointing toward the rear
of the counter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Figure 4-16 53220A/53230A Option 106/202. . . . . . . . . . . . . . . .236
Figure 4-17 Processor printed circuit board. . . . . . . . . . . . . . . . .237
Figure 4-18 T20 TORX screw on motherboard . . . . . . . . . . . . . . . 238
Figure 4-19 Connector-adapter parts . . . . . . . . . . . . . . . . . . . . . . 240
Figure 4-20 Semi-rigid cable position . . . . . . . . . . . . . . . . . . . . . . 241
Figure 4-21 53220A/53230A rear panel option 106/203. . . . . . . 246
Figure 4-22 Channel 3 assembly installed on top of the motherboard,
with the female SMA edge connector pointing toward
the rear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
Figure 5-1 Keysight 53210A/53220A/53230A Counters, top view
(cover off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .259
Figure 5-2 Keysight 53210A/53220A/53230A Counters, bottom view
(cover off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .260
Figure 6-1 Information screen . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Figure 6-2 Microwave source connection to channel 3 . . . . . . . 267
20 Keysight 53210A/53220A/53230A Assembly Level Service Guide
List of Tables
Table 1-1 Recommended test equipment for operational verification
and performance tests . . . . . . . . . . . . . . . . . . . . . .28
Table 1-2 The Keysight 53210A/53220A/53230A performance
tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Table 2-1 Recommended test equipment for calibration . . . . .120
Table 2-2 Option 106 calibration frequencies and power levels . . .
139
Table 2-3 Option 115 calibration frequencies and power levels . . .
147
Table 2-4 Recommended equipment for test and troubleshooting
155
Table 2-5 Keysight 53210A/53220A/53230A assembly
identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158
Table 2-6 DC power supply voltages . . . . . . . . . . . . . . . . . . . . .165
Table 5-1 Table of replaceable parts . . . . . . . . . . . . . . . . . . . . .256
Table 6-1 Instruments this guide directly applies to . . . . . . . . .262
Keysight 53210A/53220A/53230A Assembly Level Service Guide 21
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22 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Keysight 53210A/53220A/53230A 350 MHz Universal Frequency
Counter/Timer
Assembly Level Service Guide
1 Performance Tests
Introduction 24
Power-On Test 29
Self-Test (Q) 31
Keysight 53210A/53220A/53230A Operational Verification 33
Keysight 53210A/53220A/53230A Complete Performance Tests 37
Keysight 53210A/53220A/53230A Operational Verification and Performance
Test Record 90
Keysight 53210A/53220A/53230A Performance Test Record (Tests 1 to 7)
91
Verifying specifications.
23
1 Performance Tests
Introduction
This chapter provides procedures to test the electrical performance of
the Keysight 53210A/53220A/53230A Frequency Counters, using the
specifications provided on the CD-ROM (“Keysight 53210A/53220A/53230A
Specifications”) that came with your counter. Successful completion of all the
performance tests verifies the counter is meeting all factory specifications.
Four types of testing are provided:
– Power-on test
– Counter self-test
– operational Verification Tests
– Complete performance tests
This chapter is organized as follows:
– Introduction
– Power-On Test
– Self-Test (Q)
– Keysight 53210A/53220A/53230A Operational Verification
– Keysight 53210A/53220A/53230A Complete Performance Tests
– Keysight 53210A/53220A/53230A Operational Verification and Performance
Test Record
– Keysight 53210A/53220A/53230A Performance Test Record (Tests 1 to 7)
24 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Chapter overview
Power-on test
When the counter is first turned ON, a limited turn-on test is performed to verify
the counter is sufficiently functional to perform basic operations.
Self-test
Running the counter Self-Test initiates a series of checks against internal
standards. Successful completion of the Self-Test provides a high confidence level
that the counter is completely functional. No external test equipment is required
for this operator-initiated test.
Operational verification
The operational verification is an abbreviated check that may be performed to give
a strong degree of confidence that the instrument is capable of making basic
measurements accurately without running the complete performance tests. An
operational verification is useful for incoming inspection and routine preventative
maintenance.
Complete performance verification tests
Performance Tests 1
The complete performance verification tests verify the specifications listed on the
Keysight 53210A/53220A/53230A Product Reference CD-ROM as “Keysight
53210A/53220A/53230A Specifications.” All tests can be performed without
accessing the inside of the instrument. The complete performance tests are
recommended as acceptance tests upon initial receipt of your counter. They will
also help you to become familiar with its performance and operation. Complete
performance tests should be run at least once a year to ensure the counter is
meeting all specifications.
Quick performance check A combination of selected performance tests
(marked ‘Q’) plus the counter Self-Test provides a simple method to achieve a
high confidence in the counter’s ability to both functionally operate and to meet
specifications. These tests represent the absolute minimum set of performance
checks recommended following any service activity.
Keysight 53210A/53220A/53230A Assembly Level Service Guide 25
1 Performance Tests
Auditing the counter’s performance for the quick check points (designated by a
‘Q’) verifies performance for normal accuracy drift mechanisms.
This test does not check for abnormal component failures. To perform the quick
performance check, do the following:
– Perform the counter Self-Test as shown on page 31.
– Perform only the performance verification tests indicated with the letter Q at
the beginning of the test.
– If the counter fails the quick performance check, repair may be required. Refer
to “Troubleshooting the Counter” on page 162.
Remote testing of the counter
All of the counter tests may be run using an automated test system and remote
programming commands. Three interfaces are provided in each counter to allow
operation over an interface from a remote computer: GPIB, LAN, and USB. Refer
to the SCPI Programmer’s Reference for information on the remote commands
available for controlling the counter.
Performance test record
The results of the operational verification, and performance tests should be
recorded on a copy of the Performance Test Record, located at the end of the
complete performance tests section in this chapter.
Test considerations
For optimum performance, all performance tests should comply with the following
recommendations:
– Ensure that the ambient temperature for running the Performance Tests is
stable and between 18 degrees C and 28 degrees C. Ideally, the tests should
be performed at 23o C ±1o C.
– Ensure that ambient relative humidity is less than 80%.
– See page 37 for warm-up considerations.
– Keep the instrument cables as short as possible, consistent with the
impedance requirements. Use only RG-58 or equivalent 50 cable for
measurements.
26 Keysight 53210A/53220A/53230A Assembly Level Service Guide
– To verify the total number of accuracy places for frequency measurements, it
may be necessary to turn off Auto-Digit control. Use this set of key depressions
to turn AutoDigits OFF:
[Digits] / (AutoDigits) / <Off>
– The softkey menus shown in the test procedures represent the functionality of
the 53230A. The softkey menus for the 53210A and 53220A may be different
depending on the function selected.
Recommended calibration cycle
The counter requires periodic verification of operation. Depending on the use and
environmental conditions, aging, and measurement accuracy required, the
counter should be checked using the operational verification procedure at least
once every year. The recommended calibration cycle for specification accuracy is
also one year.
Internal auto-calibration
An Internal Auto-Calibration feature is available (see Chapter 2, "Service") that
uses internal instrument standards to refine the accuracy of the counter. It is
recommended that Auto-Cal be performed regularly (such as at the beginning of a
shift change, starting a contemporary series of measurements, after a large
ambient temperature change, etc.) for optimum counter performance.
Performance Tests 1
NOTE
Keysight 53210A/53220A/53230A Assembly Level Service Guide 27
Auto-calibration is also a subset of the counter self-test.
1 Performance Tests
Equipment required
Table 1-1 Recommended test equipment for operational verification and
Instrument Required characteristics Recommended model
performance tests
100 MHz to 15 GHz; Freq Accy at
Microwave signal generator
Pulse generator
RF signal generator
Primary frequency standard
(10 MHz house standard)
DC power supply Adjustable to 5.000V Keysight 6234A or equivalent
Digital multimeter (DMM) Microvolt accuracy Keysight 34410A or equivalent
SMA(m)-to-BNC(f) adapters (3) Keysight 1250-1200
Type N(m)-to-BNC(f) adapter Keysight 1250-0780
BNC-to-dual banana plug BNC(f) to banana plug (m)
50 coaxial cable with
BNC connectors (5)
3.5mm cables (2) DC-18 GHz,matched pair Keysight 11500E
Coaxial BNC tee connector Keysight 1250-0781
6 GHz and 15 GHz:
PW Accy: ±10%
5 nSec pulse width
40 pSec
± 2.000E-12
10 MHz
Absolute accuracy >
1 x 10-10
BNC(m) to BNC(m), 48 inches Keysight 10503A
±10ppb;
±
Keysight E8257D-520-UNW or
equivalent
Keysight 81134A or equivalent
Stanford Research Systems
CG635
Stanford Research Systems
FS725 Rubidium Timebase or
equivalent
Keysight E9637A or Newark
10M4161
28 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Power-On Test
1 Inspect the counter for any damage. Make sure no cables are connected to the
2 Connect the power cord to the counter, and connect the other end of the
Performance Tests 1
input channels (rear and front panels) of the counter.
power cord to the primary power source.
NOTE
It is normal for the fan in the counter to run at different speeds as necessary
(depending upon internal temperature) when the counter is in standby mode.
Power to the timebase is continuous to maintain long term measurement
reliability, and the fan helps maintain timebase temperature stability.
3 Verify the following condition for the Power LED with power off (lower L/H
corner of the front panel).
– No OCXO or OCXO in Off mode - LED is off when power is off.
– OCXO present, heated by AC power - LED is on solid when power
is off.
– OCXO present, heated by battery power - LED blinks when power
is off.
4 Press the POWER key (lower left-hand corner of the front panel) to turn on the
counter. Verify the following results:
– The front panel display turns white as all pixels are illuminated.
– The LED under the power switch is on solid.
– After several seconds, a screen is briefly displayed that shows the status
and ID of the IP Address and the GPIB address. The factory default GPIB
address is 3. (“Disabled” means the GPIB is turned Off under [Utility] / (I/O
Config).
– The counter is now ready to measure frequency of a signal applied to
CHANNEL 1 input as indicated by illumination of the Freq softkey and
Channel 1 annunciator.
NOTE
Keysight 53210A/53220A/53230A Assembly Level Service Guide 29
An auto-cal is performed at power-on. (See “To run auto calibration:” on
page 150 for more information.)
1 Performance Tests
NOTE
NOTE
If a fail message is displayed at power-on, refer to “Troubleshooting the
Counter” on page 162 of this service guide.
5 Mark Pass or Fail in the Keysight 53210A/53220A/53230A Power-ON Test
Record, Test 1, at the end of this chapter.
The power-on hardware initialization activities check the following circuits for
operation:
– Front panel display driver
– Power manager
– Battery (if installed)
– GPIB
– Measurement board hardware
30 Keysight 53210A/53220A/53230A Assembly Level Service Guide
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