Keysight Technologies 53147A User manual

Keysight 53147A/148A/149A
Microwave Frequency
Counter/Power Meter/DVM
Assembly Level
Service Guide
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com

2 Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide
Notices
Copyright Notice
© Keysight Technologies 2001 - 2017
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 Technol-
ogies as governed by United States and
international copyright laws.
Manual Part Number
53147-90010
Edition
Edition 3, November 1, 2017
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 fur-
nished under a license and may be
used or copied only in accordance with
the terms of such license.
Declaration of Conformity
U.S. Government Rights
The Software is “commercial computer
software,” as defined by Federal Acqui-
sition Regulation (“FAR”) 2.101. Pursu-
ant to FAR 12.212 and 27.405-3 and
Department of Defense FAR Supple-
ment (“DFARS”) 227.7202, the U.S.
government acquires commercial com-
puter 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 stan-
dard commercial license, which is
embodied in its End User License
Agreement (EULA). The license set
forth in the EULA represents the
exclusive authority by which the U.S.
government may use, modify,
distribute, ordisclose the Soft-ware.
The EULA and the license set forth
therein, does not require or per-mit,
among other things, that Keysight: (1)
Furnish technical information related to
commercial computer soft-ware or
commercial computer software
documentation that is not customarily
provided to the public; or (2) Relinquish
to, or otherwise provide, thegovern-
ment rights in excess of these rights
customarily provided to the public to
use, modify, reproduce, release, per-form,
display, or disclose commercial
computer software or commercial
com-puter 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 ofcommercial computer
software pursu-ant to the FAR and the
DFARS and are set forth specifically in
writing else-where in the EULA.
Keysight shall be under noobligation to
update, revise orotherwise modify the
Software. With respect to any
technical data asdefined 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 DIS-
CLAIMS ALL WARRANTIES, EITHER
EXPRESS OR IMPLIED, WITH REGARD
TO THIS MANUAL AND ANY INFORMA-
TION CONTAINED HEREIN, INCLUD-
ING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MER-
CHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. KEYSIGHT
SHALL NOT BE LIABLE FOR ERRORS
OR FOR INCIDENTAL OR CONSE-
QUENTIAL DAMAGES IN CONNECTION
WITH THE FURNISHING, USE, OR
PERFORMANCE OF THIS DOCUMENT
OR OF ANY INFORMATION CON-
TAINED HEREIN. SHOULD KEYSIGHT
AND THE USER HAVE A SEPARATE
WRITTEN AGREEMENT WITH WAR-
RANTY TERMS COVERING THE MATE-
RIAL 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 proce-
dure, 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 pro-
ceed 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 proce-
dure, 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.

Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide 3
Serial Prefix Number
This guide describes how to service the Keysight 53147A, 53148A, and 53149A.
The information in this guide applies to instruments having the number prefix
listed below, unless accompanied by a “Manual Updating Changes” package
indicating otherwise.
SERIAL PREFIX NUMBER: US4047 (53147A)
US4048 (53148A)
US4049 (53149A)
Certification and Warranty
Certification
Keysight Technologies certifies that this product met its published specification at
the time of shipment from the factory. Keysight further certifies that its calibration
measurements are traceable to the United States National Institute of Standards
and Technology (formerly National Bureau of Standards), to the extent allowed by
the Institute’s calibration facility, and to the calibration facilities of other
International Standards Organization members.
Warranty
Keysight warrants Keysight hardware, accessories and supplies against defects in
materials and workmanship for a period of one year from date of shipment. If
Keysight receives notice of such defects during the warranty period, Keysight will,
at its option, either repair or replace products which prove to be defective.
Replacement products may be either new or like-new.
Keysight warrants that Keysight software will not fail to execute its programming
instructions, for the period specified above, due to defects in material and
workmanship when properly installed and used. If Keysight receives notice of such
defects during the warranty period, Keysight will replace software media which
does not execute its programming instructions due to such defects.

4 Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide
Keysight does not warrant that the operation of Keysight products will be
uninterrupted or error free. If Keysight is unable, within a reasonable time, to
repair or replace any product to a condition as warranted, customer will be
entitled to a refund of the purchase price upon prompt return of the product.
Keysight products may contain remanufactured parts equivalent to new in
performance or may have been subjected to incidental use.
The warranty period begins on the date of delivery or on the date of installation if
installed by Keysight. If customer schedules or delays Keysight installation more
than 30 days after delivery, warranty begins on the 31st day from delivery.
Warranty does not apply to defects resulting from (a) improper or inadequate
maintenance or calibration, (b) software, interfacing, parts or supplies not
supplied by Keysight, (c) unauthorized modification or misuse, (d) operation
outside of the published environmental specifications for the product, or
(e) improper site preparation or maintenance.
TO THE EXTENT ALLOWED BY LOCAL LAW, THE ABOVE WARRANTIES ARE
EXCLUSIVE AND NO OTHER WARRANTY OR CONDITION, WHETHER WRITTEN
OR ORAL, IS EXPRESSED OR IMPLIED AND Keysight SPECIFICALLY DISCLAIMS
ANY IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY,
SATISFACTORY QUALITY, AND FITNESS FOR A PARTICULAR PURPOSE.
Keysight will be liable for damage to tangible property per incident up to the
greater of $300,000 or the actual amount paid for the product that is the subject
of the claim, and for damages for bodily injury or death, to the extent that all such
damages are determined by a court of competent jurisdiction to have been
directly caused by a defective Keysight product.
TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES IN THIS WARRANTY
STATEMENT ARE CUSTOMER’S SOLE AND EXCLUSIVE REMEDIES. EXCEPT AS
INDICATED ABOVE, IN NO EVENT WILL Keysight OR ITS SUPPLIERS BE LIABLE
FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL
(INCLUDING LOST PROFIT OR DATA), OR OTHER DAMAGE, WHETHER BASED IN
CONTRACT, TORT, OR OTHERWISE.
For consumer transactions in Australia and New Zealand: the warranty terms
contained in this statement, except to the extent lawfully permitted, do not
exclude, restrict or modify and are in addition to the mandatory statutory
rights applicable to the sale of this product to you.

Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide 5
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.
Direct current (DC) Alternating current (AC)
Caution, risk of danger (refer to this
manual for specific Warning or Caution
information)
Caution, risk of electric shock
Earth (ground) terminal Frame or chassis (ground) terminal
Alternating current (AC) Direct current (DC)

6 Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide
Safety Considerations
Read the information below before using this instrument.
The following general safety precautions must be observed during all phases of
operation, service, and repair of this instrument. Failure to comply with these
precautions or with specific warnings elsewhere in this manual violates safety
standards for design, manufacture, and intended use of the instrument. Keysight
Technologies assumes no liability for the customer’s failure to comply with these
requirements.
Safety Earth Ground
An uninterruptible safety earth ground must be maintained from the mains power
source to the product’s ground circuitry.
WARNING
WHEN MEASURING POWER LINE SIGNALS, BE EXTREMELY CAREFUL AND
ALWAYS USE A STEP-DOWN ISOLATION TRANSFORMER WHICH OUTPUT
IS COMPATIBLE WITH THE INPUT MEASUREMENT CAPABILITIES OF THIS
PRODUCT. THIS PRODUCT’S FRONT AND REAR PANELS ARE TYPICALLY AT
EARTH GROUND. THUS, NEVER TRY TO MEASURE AC POWER LINE
SIGNALS WITHOUT AN ISOLATION TRANSFORMER.
WARNING
INSTRUCTIONS FOR ADJUSTMENTS WHILE COVERS ARE REMOVED AND
FOR SERVICING ARE FOR USE BY SERVICE-TRAINED PERSONNEL ONLY. TO
AVOID DANGEROUS ELECTRIC SHOCK, DO NOT PERFORM SUCH
ADJUSTMENTS OR SERVICING UNLESS QUALIFIED TO DO SO.
WARNING
ANY INTERRUPTION OF THE PROTECTIVE GROUNDING CONDUCTOR
(INSIDE OR OUTSIDE THE PRODUCT’S CIRCUITRY) OR DISCONNECTING
THE PROTECTIVE EARTH TERMINAL WILL CAUSE A POTENTIAL SHOCK
HAZARD THAT COULD RESULT IN PERSONAL INJURY. (GROUNDING ONE
CONDUCTOR OF A TWO CONDUCTOR OUTLET IS NOT SUFFICEIENT
PROTECTION.)

Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide 7
Whenever it is likely that the protection has been impaired, the instrument must
be made inpoerative and be secured against any unintended operation.
If this instrument is to be energized via an autotransformer (for voltage reduction),
make sure the common terminal is connected to the earthed pole terminal
(neutral) of the power source.
Instructions for adjustments while covers are removed and for servicing are for use
by trained personnel only. To avoid dangerous electric shock, do not perform such
ajdustments or servicing unless qualified to do so.
For continued protection against fire, replace the line fuse(s) with fuses of the
same current rating and type (for example, normal blow, time delay). Do not use
repaired fuses or short-circuited fuseholders.
Acoustic Noise Emissions
LpA<47 dB at operator position, at normal operation, tested per EN 27779. All
data are the results from type test.
Geräuschemission
LpA<47 dB am Arbeits
platz, normaler Betrieb, geprüft nach EN 27779.
Die Angagen beruhen auf Ergebnissen von Typenprüfungen.
Electrostatic Discharge Immunity Testing
When the product is tested with 8kV AD, 4kV CD and 4kV ID according to
IEC801-2, a system error may occur that may affect measurement data made
during these disturbances. After these occurrences, the system self-recovers
without user intervention.

8 Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide
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.

Keysight 53147A/148A/149A Assembly Level Service Guide 9
Table of Contents
Serial Prefix Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Certification and Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Safety Earth Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Acoustic Noise Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Geräuschemission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Electrostatic Discharge Immunity Testing . . . . . . . . . . . . . . . . . . . . . . . .7
Waste Electrical and Electronic Equipment (WEEE) Directive . . . . . . . .8
Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
1 Performance Tests - Verifying Specifications
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Operational Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Complete Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Recommended Calibration Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Operational Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Power-On Self Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
10 MHz Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Run Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
External Timebase Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Power Meter Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
DVM Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

10 Keysight 53147A/148A/149A Assembly Level Service Guide
Complete Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Test 1: Channel 1 Frequency Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . 31
Test 1a: 10 Hz to 20 MHz Frequency Sensitivity . . . . . . . . . . . . . . . 31
Test 1b: 50 MHz to 125 MHz Frequency Sensitivity . . . . . . . . . . . . . 33
Test 2: Channel 2 Frequency Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . 35
Test 2a: 50 MHz to 20 GHz Frequency Sensitivity . . . . . . . . . . . . . . 35
Test 2b: 22 GHz to 26.5 GHz Frequency Sensitivity . . . . . . . . . . . . . 37
Test 2c: 30 GHz to 46 GHz Frequency Sensitivity . . . . . . . . . . . . . . 38
Test 3: Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Power Measurement Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . 39
Test 4: Power Reference Oscillator Frequency . . . . . . . . . . . . . . . . . . . 42
Power Reference Oscillator Frequency Test . . . . . . . . . . . . . . . . . . . 42
Test 5: Power Meter Reference Level . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Power Meter Reference Level: Method 1 . . . . . . . . . . . . . . . . . . . . . 44
Power Meter Reference Level: Method 2 . . . . . . . . . . . . . . . . . . . . . 46
Performance Test Record (Page 1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . 51
Performance Test Record (Page 2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . 52
Performance Test Record (Page 3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . 53
2Service
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Returning the Instrument to Keysight Technologies for Service . . . . . 57
Providing Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Packing the Instrument in the Original Packaging Materials . . . . . . 58
Packing the Instrument in Commercially Available Packaging
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
10 MHz Timebase Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Power Reference Oscillator Frequency Calibration . . . . . . . . . . . . . 62
Power Reference Oscillator Level Adjustment . . . . . . . . . . . . . . . . . 66
DVM Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Pre-Troubleshooting Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Keysight 53147A/148A/149A Assembly Level Service Guide 11
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Repair Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
After Service Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Assembly Identification and Location . . . . . . . . . . . . . . . . . . . . . . . .79
Troubleshooting the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Power Supply Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
3 Replacing Assemblies - Disassembly and Reassembly
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
Do This First . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Removing the Bumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
Removing the Handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94
Removing the Bumper Retainers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
Removing the Shroud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
Removing the Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Removing the Rear Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . .101
Removing the Cooling Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
Removing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
4 Replaceable Parts
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
How To Order A Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Contacting Keysight Technologies . . . . . . . . . . . . . . . . . . . . . . . . .111
Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Reference Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Cabinet Parts and Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Accessories and Miscellaneous Items . . . . . . . . . . . . . . . . . . . . . . .112
5 Backdating

12 Keysight 53147A/148A/149A Assembly Level Service Guide
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
6Specifications
A Rack Mounting the Instrument
Rack Mounting the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Keysight 53147A/148A/149A Assembly Level Service Guide 13
List of Figures
Figure 1-1 External Timebase Test Setup . . . . . . . . . . . . . . . . . . .25
Figure 1-2 DVM Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 1-3 10 Hz to 20 MHz Frequency Sensitivity Test Setup . .32
Figure 1-4 50 MHz to 125 MHz Frequency Sensitivity Test
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Figure 1-5 50 MHz to 20 GHz Frequency Sensitivity Test Setup .36
Figure 1-6 Power Measurement Accuracy Test Setup . . . . . . . . .39
Figure 1-7 Reference Oscillator Frequency Adjustment Setup . .43
Figure 1-8 E4418B Power Meter Zeroing and Calibration Test
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Figure 1-9 Power Meter Reference Level Test Setup . . . . . . . . . .45
Figure 1-10 Keysight 8120-1082 Power Sensor Cable End View . .46
Figure 1-11 Power Meter Reference Level Test Setup . . . . . . . . . .47
Figure 2-1 Calibrating the 10 MHz Frequency Reference
Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Figure 2-2 Reference Oscillator Frequency Adjustment Setup . .63
Figure 2-3 Power Reference Oscillator Adjustment Locations . . .65
Figure 2-4 E4418B Power Meter Zeroing and Calibration Test
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Figure 2-5 Power Meter Reference Level Test Setup . . . . . . . . . .67
Figure 2-6 Keysight 8120-1082 Power Sensor Cable End View . .68
Figure 2-7 Power Meter Reference Level Calibration Setup . . . . .69
Figure 2-8 DVM Tests Main Menu . . . . . . . . . . . . . . . . . . . . . . . . .74
Figure 2-9 Replaceable Assembly Locations — Top Internal View 80
Figure 2-10 A4 DC Power Supply Test-Point Locations . . . . . . . . .81
Figure 3-1 Removing the Bumpers . . . . . . . . . . . . . . . . . . . . . . . .93
Figure 3-2 Removing the Handle . . . . . . . . . . . . . . . . . . . . . . . . . .94
Figure 3-3 Removing the Bumper Retainers . . . . . . . . . . . . . . . . .95
Figure 3-4 Removing the Shroud . . . . . . . . . . . . . . . . . . . . . . . . .97
Figure 3-5 Removing the Front Panel Assembly . . . . . . . . . . . . . .99
Figure 3-6 Rear Panel Assembly Screws . . . . . . . . . . . . . . . . . . .101
Figure 3-7 Cooling Fan Screws . . . . . . . . . . . . . . . . . . . . . . . . . .103
Figure 3-8 Removing the Power Supply . . . . . . . . . . . . . . . . . . .104
Figure 4-1 Keysight 53147A/148A/149A Exploded View — Internal

14 Keysight 53147A/148A/149A Assembly Level Service Guide
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Figure 4-2 Keysight 53147A/148A/149A Exploded View — Cabinet
and External Parts . . . . . . . . . . . . . . . . . . . . . . . . . 114
Figure 4-3 Keysight 53147A/148A/149A Top View . . . . . . . . . . 115

Keysight 53147A/148A/149A Assembly Level Service Guide 15
List of Tables
Table 1-1 Recommended Test Equipment and Accessories . . . .20
Table 1-2 Complete Performance Tests . . . . . . . . . . . . . . . . . . . .30
Table 1-3 Range Calibrator Settings and Expected Results . . . .41
Table 2-1 Recommended Test Equipment and Accessories . . . .59
Table 2-2 Keysight 53147A/148A/149A Assembly Identification 79
Table 2-3 A4 Power Supply Inputs and Outputs . . . . . . . . . . . . .82
Table 2-4 Self-Test Messages . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Table 2-5 Front Panel Display Error Messages . . . . . . . . . . . . . .85
Table 2-6 RS-232 Error Messages . . . . . . . . . . . . . . . . . . . . . . . .86
Table 4-1 Reference Designations . . . . . . . . . . . . . . . . . . . . . . .112
Table 4-2 Keysight 53147A/148A/149A Replaceable Parts . . .116
Table 4-3 Keysight 53147A/148A/149A Accessories and Miscella-
neous Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

16 Keysight 53147A/148A/149A Assembly Level Service Guide
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Keysight 53147A/148A/149A Microwave Frequency Counter/
Power Meter/DVM
Assembly Level Service Guide
17
1 Performance Tests -
Verifying Specifications
Introduction 18
Equipment Required 20
Operational Verification 22
Complete Performance Tests 30
Test 1: Channel 1 Frequency Sensitivity 31
Test 2: Channel 2 Frequency Sensitivity 35
Test 3: Power Measurement 39
Test 4: Power Reference Oscillator Frequency 42
Test 5: Power Meter Reference Level 44
Performance Test Record (Page 1 of 3) 51
Performance Test Record (Page 2 of 3) 52
Performance Test Record (Page 3 of 3) 53

1 Performance Tests - Verifying Specifications
18 Keysight 53147A/148A/149A Assembly Level Service Guide
Introduction
This chapter provides procedures to test the electrical performance of the
Keysight 53147A, 53148A, and 53149A. These procedures are based on the
specifications in Chapter 6, “Specifications”.
Two types of testing are provided:
– Operational Verification
– Complete Performance Tests
This chapter is organized as follows:
–“Introduction” pg. 18
–“Equipment Required” pg. 20
–“Operational Verification” pg. 22
–“Complete Performance Tests” pg. 30
–“Performance Test Record” pg. 51
Operational Verification
Operational Verification is an abbreviated series of tests that you can perform
(instead of performing the Complete Performance Tests) to provide a high degree
of confidence that the instrument is operating properly. Operational Verification is
useful for incoming inspection, routine maintenance, and after instrument repair.
Complete Performance Tests
The Complete Performance Tests verify the specifications listed in Chapter 6,
“Specifications”. All tests can be performed without opening the instrument.

Performance Tests - Verifying Specifications 1
Keysight 53147A/148A/149A Assembly Level Service Guide 19
Recommended Calibration Cycle
The instrument requires periodic verification of operation. Depending on the type
of use, environmental conditions, aging, and measurement accuracy required, the
instrument should be checked using the operational verification procedure at
least once every year. A full Calibration and Performance Test should be
performed each time the instrument changes environment or if an assembly or
module has been replaced.
Test Record
The results of the Operational Verification and the Complete 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.

1 Performance Tests - Verifying Specifications
20 Keysight 53147A/148A/149A Assembly Level Service Guide
Equipment Required
Table 1-1 lists the test equipment and accessories needed to perform the tests in
this chapter.
Table 1-1 Recommended Test Equipment and Accessories
Instrument Type Required Characteristics Model Recommended[a] Quantity
Required Use[b]
Synthesized Signal
Generator 10 Hz to 20 MHz, +7 dBm to –40 dBm Keysight 3325A/B 2 OV, P, T
Microwave Synthesized
Signal Generator
10 MHz to 50 GHz, Accuracy >1 x 10-10
+7 dBm to –50 dBm Keysight 83650B 1 P, T
Microwave Amplifier 45 MHz to 50 GHz Keysight 83051A 1 P, T
Digital Multimeter 6½ digit AC/DC Keysight 34401A 1 OV, P
DC Power Supply 25 VDC Keysight E3640A 1 OV
Frequency Counter 10 Hz to 125 MHz Keysight 53150A/51A/52A 1 P, C, T
Power Meter Range 1 mW Keysight 432A 1 P, C, T
Power Meter 50 MHz to 50 GHz, +13 dBm to –50 dBm Keysight 437B 1 P, C, T
Power Meter 100 kHz to 110 GHz, –70 dBm to +44 dBm Keysight E4418B 1 P, C, T
Thermistor Mount SWR 1.05 at 50 MHz
Accuracy ±0.5% at 50 MHz
Keysight 478A-H75 or
478A-H76 1P,T
Power Sensor 10 MHz to 18 GHz, -30 dBm to +20 dBm Keysight 8481A 1 P, T
Power Sensor 50 MHz to 50 GHz, +13 dBm to –50 dBm Keysight 8487A 1 P, C, T
Power Sensor Cable 2.4 mm to 2.4 mm, 5 ft. Keysight 11730A 2[c] P, T
Power Sensor Cable Keysight 8120-1082 1 P, T
Range Calibrator 3, 10, 30, 100, and 300 µW
1, 3, 10, 30, and 100 mW Keysight 11683A 1 P
20 dB Attenuator DC to 50 GHz
2.4 mm (m) to 2.4 mm (f)
Keysight 8490D
(Opt. 020) 1P,T
Power Splitter DC to 50 GHz
2.4 mm (f3x) Keysight 11667C/D 1 P, T