Keysight Technologies 53150A, 53152A, 53151A Service Manual

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Keysight 53150A/151A/152A Microwave Frequency Counter

This guide describes how to use the Keysight 53150A, 53151A, and 53152A Microwave Frequency Counters. 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: 3735A, US3925, and US4050 (53150A)

3736A, US3926, and US4051 (53151A) 3737A, US3927, and US4052 (53152A)

Assembly Level Service Guide

Notices

CAUTION

WARNING

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.

Manual Part Number

53150-90015

Edition

Edition 3, December 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 furnished 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 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

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.

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 53150A/151A/152A Assembly Level Service Guide

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.

Caution, risk of danger (refer to this manual for specific Warning or Caution information)

Earth (ground) terminal Frame or chassis (ground) terminal

Alternating current (AC) Direct current (DC)

Caution, risk of electric shock

Keysight 53150A/151A/152A Assembly Level Service Guide 3

Detailed Warranty Information

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.

4 Keysight 53150A/151A/152A Assembly Level Service Guide

Safety Considerations

WARNING

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.

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.

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 RESUL T IN PERSONAL INJURY. (GROUND ING ONE CONDUCTOR OF A TWO CONDUCTOR OUTLET IS NOT SUFFICIENT PROTECTION.)

Keysight 53150A/151A/152A Assembly Level Service Guide 5

Whenever it is likely that the protection has been impaired, the instrument must be made inoperative 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 adjustments 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.

Safety Earth Ground

WARNING

An uninterruptible safety earth ground must be maintained from the mains power source to the product’s ground circuitry.

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 TYPCIALLY AT EARTH GROUND. THUS, NEVER TRY TO MEASURE AC POWER LINE SIGNALS WITHOUT AN ISOLATION TRANSFORMER.

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.

6 Keysight 53150A/151A/152A 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 53150A/151A/152A Assembly Level Service Guide 7

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8 Keysight 53150A/151A/152A Assembly Level Service Guide

Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Detailed Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Safety Earth Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Acoustic Noise Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Geräuschemission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Electrostatic Discharge Immunity Testing . . . . . . . . . . . . . . . . . . . . . . . .6

Waste Electrical and Electronic Equipment (WEEE) Directive . . . . . . . . 7

Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

In This Guide

How to Use This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Repair Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Instrument Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Instruments Covered by this Guide . . . . . . . . . . . . . . . . . . . . . . . . . .19

Assembly-Level Service Guide Organization . . . . . . . . . . . . . . . . . .19

How to Order Guides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Description of the Microwave Frequency Counter . . . . . . . . . . . . . . . . 21

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Accessories Supplied and Available . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Accessories Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Accessories Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Manuals Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

1 Performance Tests - Verifying Specifications

Keysight 53150A/151A/152A Assembly Level Service Guide 9

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Operational Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Complete Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Recommended Calibration Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Operational Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Power-On Self Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

10 MHz Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Run Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

External Timebase Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

10 MHz External Timebase Input Test . . . . . . . . . . . . . . . . . . . . . . . 32

Complete Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Test 1: External Timebase Input Test . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

1 MHz External Timebase Input Test . . . . . . . . . . . . . . . . . . . . . . . . 36

2 MHz External Timebase Input Test . . . . . . . . . . . . . . . . . . . . . . . . 38

5 MHz External Timebase Input Test . . . . . . . . . . . . . . . . . . . . . . . . 38

10 MHz External Timebase Input Test . . . . . . . . . . . . . . . . . . . . . . . 39

Test 2: Channel 1 Frequency Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . 40

Test 2a: 10 Hz to 20 MHz Frequency Sensitivity . . . . . . . . . . . . . . . 40

Test 2b: 50 MHz to 125 MHz Frequency Sensitivity . . . . . . . . . . . . . 42

Test 3: Channel 2 Frequency Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . 45

Test 3a: 50 MHz to 20 GHz Frequency Sensitivity . . . . . . . . . . . . . . 45

Test 3b: 22 GHz to 26.5 GHz Frequency Sensitivity . . . . . . . . . . . . . 47

Test 3c: 30 GHz to 46 GHz Frequency Sensitivity . . . . . . . . . . . . . . 48

Test 4: Channel 2 Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 49

Test 4a: 50 MHz to 20 GHz Power Measurement (–20 dBm) . . . . . 49

Test 4b: Channel 2 22 GHz to 26.5 GHz Power Measurement

(–20 dBm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Test 4c: Channel 2 26.5 GHz to 46 GHz Power Measurement

(–20 dBm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Test 4d: Channel 2 50 MHz to 20 GHz Power Measurement

(0 dBm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Test 4e: Channel 2 22 GHz to 26.5 GHz Power Measurement

10 Keysight 53150A/151A/152A Assembly Level Service Guide

(0 dBm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Test 4f: Channel 2 30 GHz to 46 GHz Power Measurement

(0 dBm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Performance Test Record (Page 1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . .54

Performance Test Record (Page 2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . .55

Performance Test Record (Page 3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . .56

Performance Test Record (Page 4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . .57

2Service

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Returning the Counter to Keysight Technologies for Service . . . . . . . . 61

Providing Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Packing the Counter in the Original Packaging Materials . . . . . . . .62

Packing the Counter in Commercially Available Packaging

Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Pre-Troubleshooting Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Repair Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

After Service Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

Assembly Identification and Location . . . . . . . . . . . . . . . . . . . . . . . .68

Troubleshooting the Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Power Supply Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

3 Replacing Assemblies - Disassembly and Reassembly

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Do This First . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Removing the Bumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Removing the Handle and Handle Mounts . . . . . . . . . . . . . . . . . . . . . .81

Keysight 53150A/151A/152A Assembly Level Service Guide 11

Removing the Rear Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Removing the Shroud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Removing the Front Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Removing the Rear Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Removing the Cooling Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Replacing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

4Replaceable Parts

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

How To Order A Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Contacting Keysight Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Reference Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Cabinet Parts and Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Accessories and Miscellaneous Items . . . . . . . . . . . . . . . . . . . . . . 100

5Backdating

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

6Specifications

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

12 Keysight 53150A/151A/152A Assembly Level Service Guide

List of Figures

Figure 1-1 External Timebase Test Setup . . . . . . . . . . . . . . . . . . .33

Figure 1-2 External Timebase Test Setup . . . . . . . . . . . . . . . . . . .37

Figure 1-3 10 Hz to 20 MHz Frequency Sensitivity Test Setup . .41 Figure 1-4 50 MHz to 125 MHz Frequency Sensitivity Test

Figure 1-5 50 MHz to 20 GHz Frequency Sensitivity Test

Figure 1-6 50 MHz to 20 GHz (–20 dBm) Power Measurement

Figure 2-1 Calibrating the Counter . . . . . . . . . . . . . . . . . . . . . . . .63

Figure 2-3 A4 DC Power Supply Test-Point Locations . . . . . . . . .70

Figure 4-1 Keysight 53150A/151A/152A Exploded View —

Figure 4-2 Keysight 53150A/151A/152A Exploded View —

Figure 4-3 Keysight 53150A/151A/152A Top View . . . . . . . . . .103

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Internal Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Cabinet and External Parts . . . . . . . . . . . . . . . . . .102

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14 Keysight 53150A/151A/152A Assembly Level Service Guide

List of Tables

Table 1-1 Recommended Test Equipment and Accessories . . . .28

Table 1-2 Complete Performance Tests . . . . . . . . . . . . . . . . . . . .35

Table 2-1 Keysight 53150A/151A/152A Assembly

Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Table 2-2 A4 Power Supply Inputs and Outputs . . . . . . . . . . . . . 71

Table 2-3 Self-Test Messages . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Table 2-4 Front Panel Display Error Messages . . . . . . . . . . . . . .74

Table 2-5 RS-232 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . 75

Table 4-1 Reference Designations . . . . . . . . . . . . . . . . . . . . . . .100

Table 4-2 Keysight 53150A/151A/152A Replaceable Parts . . .104 Table 4-3 Keysight 53150A/151A/152A Accessories and

Miscellaneous Items . . . . . . . . . . . . . . . . . . . . . . .106

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16 Keysight 53150A/151A/152A Assembly Level Service Guide

Keysight 53150A/151A/152A Microwave Frequency Counter Assembly Level Service Guide

In This Guide

How to Use This Guide 18 Description of the Microwave Frequency Counter 21 Options 22 Accessories Supplied and Available 23

This guide provides assembly-level service information for the Keysight 53150A, 53151A, and 53152A Counters.

In This Guide

NOTE

How to Use This Guide

Repair Strategy

This service guide is designed to isolate failures to the assembly level only.

The Keysight 53150A/151A/152A Counter can be returned to Keysight for all service work, including troubleshooting, and verifying specifications. Contact your nearest Keysight Sales and Service Office for more details.

ISD (Instrument Service Division) Emergency Response or Express Calibration Service is available for Keysight customers in the USA. If downtime is critical, you can receive your repaired Counter via overnight shipment. Call

1-800-403-0801, and ask for Emergency Response or Express Calibration Service. When your Counter is repaired, it is returned via overnight shipment at

no extra charge.

If you decide to service the Counter yourself, use the troubleshooting procedures in Chapter 2 (Service) and the disassembly and reassembly procedures in

Chapter 3 (Replacing Assemblies - Disassembly and Reassembly). Then, use the

calibration instructions in Chapter 2 to calibrate the Counter for peak-performance operation, and finally, perform all of the performance tests in

Chapter 1 to verify that the Counter is operating to the specifications.

If the motherboard, the sampler, or the front-panel assembly are defective, the instrument must be returned to an Keysight Service Center for repair and recalibration.

18 Keysight 53150A/151A/152A Assembly Level Service Guide

Instrument Identification

The instrument is identified by the serial number on the rear panel. Keysight uses a two-part serial number with the first part (prefix) identifying a series of instruments and the second part (suffix) identifying a particular instrument within a series. Keysight-assigned alpha characters before the prefix identify the country in which the instrument was manufactured.

Instruments Covered by this Guide

This guide applies directly to Keysight 53150A, 53151A, and 53152A Counters that have the same serial number prefix(es) shown on the title page. If the serial number prefix of your Counter differs from that listed on the title page of this guide, there may be differences between this guide and your instrument.

Instruments having a higher serial prefix are covered (when required) by one or more manual-change sheets included with this guide. If a required change sheet is missing, contact your nearest Keysight Sales Office listed at the back of this guide.

Assembly-Level Service Guide Organization

In This Guide

This Assembly-Level Service Guide consists of a table of contents, a preface, six chapters, and an index. The page headers identify the chapters and sections of this manual. The chapter contents are summarized as follows:

Chapter 1, “Performance Tests - Verifying Specifications” provides procedures

that verify the Counter operates properly and meets the Keysight 53150A/151A/ 152A specifications given in Chapter 6, “Specifications” in this guide.

Chapter 2, “Service” is divided into seven main sections that provide instructions

for returning the Counter to Keysight for service, calibrating the Counter, and troubleshooting the assemblies in the Counter.

Chapter 3, “Replacing Assemblies - Disassembly and Reassembly” provides

procedures for replacing defective assemblies and/or modules in the Counter.

Keysight 53150A/151A/152A Assembly Level Service Guide 19

In This Guide

How to Order Guides

Chapter 4, “Replaceable Parts” lists the replaceable parts contained in the

Counter, and explains how to order replacement parts for your Counter.

Chapter 5, “Backdating” contains information required to adapt this manual for

older instruments (to be provided when required).

Chapter 6, “Specifications” lists all the specifications and operating

characteristics for the Keysight 53150A/151A/152A Counter.

The part number for this guide is listed on the Certification and Warranty page (page 4) and on the back cover of this guide.

20 Keysight 53150A/151A/152A Assembly Level Service Guide

Description of the Microwave Frequency Counter

The Keysight 53150A, 53151A, and 53152A Microwave Frequency Counters are capable of measuring frequencies from 10 Hz to 125 MHz on Channel 1 and from 50 MHz to 20 GHz (53150A), 26.5 GHz (53151A), and 46 GHz (53152A) on Channel 2. These frequency counters are also capable of measuring power on Channel 2 (in the same frequency ranges). All three Counters have a maximum frequency resolution of 1 Hz.

The Keysight 53150A/151A/152A provides GPIB and RS-232 serial interfaces and are suitable for bench-top and ATE operation.

The basic measurement functions of the Keysight 53150A/151A/152A include Frequency, Relative Frequency, Frequency Offset, and Power (including Power Offset and Relative Power). All of these features are accessible from the front panel and over the GPIB and RS-232 interfaces.

The Keysight 53150A/151A/152A includes the following additional measurement functions and features that are designed specifically for manufacturing and service applications:

– 1, 2, 5, and 10 MHz external reference capability

– Optional high-stability oven oscillator for high-accuracy needs and lengthened

calibration cycles

– Frequency and power offset capabilities for relative measurements

– SCPI programming capability

In This Guide

– Battery and dc input option for operation in locations where AC power is

unavailable

– Optional soft carrying case for safe transportation and mobile use

Programmable control is performed via an GPIB or an RS-232 serial interface. The GPIB and RS-232C ports are standard for the Keysight 53150A, 53151A, and 53152A.

Keysight 53150A/151A/152A Assembly Level Service Guide 21

In This Guide

NOTE

Options

Hardware

The options available for the Keysight 53150A/151A/152A are listed following this paragraph. Specifications for the options are listed in Chapter 6, “Specifications”. Options ordered with the Counter are installed at the factory and are ready for operation on delivery.

– High Stability Oven Timebase, Option 001

– Battery/DC Power Input, Option 002

– Rack Mount Kit, Option 1CM (not installed)

– Soft Carrying Case, Option 007 (not installed)

Hardware options can be retrofitted at an Keysight Service Center. However, the cost to retrofit options is considerably higher than the cost of the same options when purchased with the instrument.

Support

–3-year Return to Keysight for Repair, Option W30

– 3-year Return to Keysight for Calibration, Option W32

– 3-year Return to Keysight for Standards Compliant Calibration,

Option W34

–5-year Return to Keysight for Repair, Option W50

– 5-year Return to Keysight for Calibration, Option W52

– 5-year Return to Keysight for Standards Compliant Calibration,

Option W54

22 Keysight 53150A/151A/152A Assembly Level Service Guide

Accessories Supplied and Available

Accessories Supplied

– Power cord, 2.3 meters (part number dependent upon destination country)

– Fuse (Keysight P/N 2110-0007)

Accessories Available

– Accessories for use with Option 002 (Battery/DC Power Input):

– Automotive Power Adapter (Keysight P/N 53150-60214)

– Battery (Keysight P/N 53150-80010)

– Battery Charger (Keysight P/N 53150-60217) 115V

(includes Automotive Power Adapter)

– Battery Charger (Keysight P/N 53150-60218) 230V

(includes Automotive Power Adapter)

– GPIB Cables (Keysight P/N 10833A/B/C/D)

– RS-232 Cable (Keysight P/N 53150-60215)

In This Guide

– Soft Carrying Case (Keysight P/N 53150-80016) — same as Option 007

– Rack Mount Kit (Keysight P/N 53150-67001) — same as Option 1CM

Manuals Supplied

Keysight 53150A/151A/152A Operating Guide

(Keysight P/N 53150-90013)

Keysight 53150A/151A/152A Programming Guide

(Keysight P/N 53150-90014)

Keysight 53150A/151A/152A Assembly-Level Service Guide

(Keysight P/N 53150-90015)

Keysight 53150A/151A/152A Assembly Level Service Guide 23

In This Guide

THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

24 Keysight 53150A/151A/152A Assembly Level Service Guide

Keysight 53150A/151A/152A Microwave Frequency Counter Assembly Level Service Guide

1 Performance Tests -

Verifying Specifications

Introduction 26 Equipment Required 28 Operational Verification 29 Complete Performance Tests 35 Test 1: External Timebase Input Test 36 Test 2: Channel 1 Frequency Sensitivity 40 Test 3: Channel 2 Frequency Sensitivity 45 Test 4: Channel 2 Power Measurement 49 Performance Test Record (Page 1 of 4) 54 Performance Test Record (Page 2 of 4) 55 Performance Test Record (Page 3 of 4) 56 Performance Test Record (Page 4 of 4) 57

1 Performance Tests - Verifying Specifications

Introduction

This chapter provides procedures to test the electrical performance of the Keysight 53150A/151A/152A. These procedures are based on the Counter specifications in Chapter 6, “Specifications”.

Two types of testing are provided:

– Operational Verification

– Complete Performance Tests

This chapter is organized as follows:

– Introduction pg. 26

– Equipment Required pg. 28

– Operational Verification pg. 29

– Complete Performance Tests pg. 35

– Performance Test Record pg. 54

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.

26 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

Complete Performance Tests

The Complete Performance Tests verify the specifications listed in Chapter 6, “Specifications”. All tests can be performed without opening the instrument.

Recommended Calibration Cycle

The Counter requires periodic verification of operation. Depending on the type of use, environmental conditions, aging, and measurement accuracy required, the Counter should be checked using the operational verification procedure at least once every year after the unit is first placed in operation. A full Calibration and Performance Test should be performed each time the Counter 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 Test section in this chapter.

Keysight 53150A/151A/152A Assembly Level Service Guide 27

1 Performance Tests - Verifying Specifications

Equipment Required

Tabl e 1-1 lists the test equipment and accessories needed to perform the tests.

Tab le 1- 1 Recommended Test Equipment and Accessories

Model

Instrument Type Required Characteristics

Synthesized Signal Generator

Microwave Synthesized Signal Generator

Microwave Amplifier 45 MHz to 50 GHz Keysight 83051A 1 P, T

Power Meter

Power Sensor

Power Sensor Cable 2.4 mm to 2.4 mm, 5 ft. Keysight 11730A 1 P, T

50 W Feedthrough Terminator 50 W (m to f) BNC Keysight 10100C 1 OV, P, T

20 dB Attenuator

Power Splitter

Cables

Adapters

10 Hz to 20 MHz +7 dBm to –40 dBm

10 MHz to 50 GHz Accuracy >1 x 10

+7 dBm to –50 dBm

50 MHz to 50 GHz +13 dBm to –50 dBm

DC to 50 GHz

2.4 mm (m) to 2.4 mm (f)

DC to 50 GHz

2.4 mm (f3x)

BNC (m) to BNC (m)

2.4 mm (m) to 2.4 mm (m)

BNC (m) to SMA (f)

3.5 mm (f) to 2.92 mm (m)

2.92 mm (m) to 2.4 mm (m)

2.92 mm (m) to 2.4 mm (f)

2.4 mm (m) to 2.4 mm (m)

2.4 mm (f) to 2.4 mm (f)

-10

Recommended

Keysight 3325A/B 2 OV, P, T

Keysight 83650B 1 P, T

Keysight 437B 1 P, T

Keysight 8487A/D 1 P, T

Keysight 8490D (Opt. 020)

Keysight 11667C/D 1 P, T

Keysight 10503 series—2

Keysight 1250-2015 — Keysight 11904A Keysight 11904D Keysight 11900A Keysight 11900B

[a]

Quantity Required

1P, T

1 1 1 1 1

[b]

Use

OV, P, C, T

P, T

[a] Equivalent equipment can be substituted for all instruments and accessories.

[b] OV = Operational Verification P = Performance Tests C = Calibration T = Troubleshooting

28 Keysight 53150A/151A/152A Assembly Level Service Guide

Operational Verification

NOTE

If you are not familiar with operating the Counter, you should review Chapter 1, “Getting Started,” in the Keysight 53150A/151A/152A Operating Guide. However, the procedures in this chapter are written so that little experience is necessary. These procedures should be followed in the order in which they appear.

Power-On Self Tests

This test is appropriate for the Keysight 53150A, 53151A, and 53152A Counters.

1 Inspect the Counter for damage.

2 Make sure no cables are connected to the Counter’s inputs.

3 Connect the power cord to the Counter and the power source.

Performance Tests - Verifying Specifications 1

Since the Counter’s power supply automatically senses the line voltage, there is no AC input-voltage setting.

4 Turn on the Main ~ Power switch on the Counter’s rear panel.

It is normal for the fan in the Counter to run when the Counter is in Standby mode. Power is supplied to the timebase whenever the Main ~ Power switch is on to maintain long-term measurement reliability, and the fan helps to maintain the timebase’s temperature stability.

5 Press and release the Power button on the front panel.

Keysight 53150A/151A/152A Assembly Level Service Guide 29

1 Performance Tests - Verifying Specifications

NOTE

6 Verify that the front-panel display shows the following:

– All segments of the front-panel display are temporarily activated.

– TESTING is displayed.

– SELF TEST OK is displayed.

– The model number of the Counter is displayed (a four-digit hex number is

also displayed).

– GPIB ADDR nn (nn = a two digit number from 0 to 30) is displayed.

– CH2 NO SIGNAL is displayed.

7 If an error message is displayed, refer to the troubleshooting section in

Chapter 2, “Service”.

8 Mark Pass or Fail in the Performance Test Record on page 54, Test 1.

To ensure that the test results are valid, the Counter and the test equipment should be powered on for at least 30 minutes prior to beginning the tests. This allows the internal temperatures of the equipment and the timebase to stabilize.

10 MHz Test

1 Connect a BNC-to-BNC cable from the Reference 10MHz connector on the

Counter’s rear panel to the CHANNEL 1 input connector on the front panel.

2 Press and release the Chan Select key (CH1 is displayed).

3 Verify that the display reads 10,000,000 Hz.

4 Mark Pass or Fail in the Performance Test Record on page 54, Test 2.

30 Keysight 53150A/151A/152A Assembly Level Service Guide

Run Self Test

NOTE

This test is appropriate for the Keysight 53150A, 53151A, and 53152A Counters.

1 Disconnect all signal cables from the input and Reference 10MHz connectors.

2 Press and release the Shift key, and then press and release the Menu (Reset/

Local) key.

3 Press the up- and/or down-arrow key(s) as many times as necessary until

DO SELF TEST is displayed.

4 Press and release the Enter key.

5 If no errors are detected, SELF TEST OK is briefly displayed when the self test

is completed. If any error messages are displayed, refer to the troubleshooting section in Chapter 2, “Service”.

6 Mark Pass or Fail in the Performance Test Record on page 54, Test 3.

Performance Tests - Verifying Specifications 1

Keysight 53150A/151A/152A Assembly Level Service Guide 31

1 Performance Tests - Verifying Specifications

NOTE

External Timebase Test

This test verifies the 10 MHz external timebase specifications of the Counter by verifying that setting REF OSC to EXT allows the Counter to be synchronized to the external reference signal.

Equipment Required

Keysight 3325A/B Synthesizer (2) Keysight 10100C 50W Feedthrough Terminator Keysight 10503 Series Coaxial Cables (BNC m to m) (2)

– To ensure that the test results are valid, the Counter and the test equipment

should be powered on for at least 30 minutes prior to beginning the tests. This allows the internal temperatures of the equipment to stabilize.

– These tests are appropriate for the Keysight 53150A, 53151A, and 53152A

Counters.

10 MHz External Timebase Input Test

1 Connect an Keysight 10503 series coaxial cable between the output of the first

Keysight 3325A/B Synthesizer and the Reference 10MHz connector on the Counter’s rear panel (see Figure 1-2).

2 Connect the Keysight 10100C 50W Feedthrough Terminator to the Counter’s

CHANNEL 1 input connector.

3 Connect an Keysight 10503 series coaxial cable between the output of the

second Synthesizer and the Keysight 10100C 50W Feedthrough Terminator on the Counter’s CHANNEL 1 input connector.

32 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

Keysight 53150A/51A/52A Counter

Keysight 3325A/B Synthesizer

To Reference 10 MHz

Connector

(Rear Panel)

Output

Channel 1

Figure 1-1 External Timebase Test Setup

4 Cycle the POWER button to preset the Counter.

5 Press the Shift key on the Counter’s front panel.

Keysight 53150A/151A/152A Assembly Level Service Guide 33

6 Press the Menu key on the Counter’s front panel.

7 If necessary, use the up- and down-arrow keys to cycle the display until it

reads REF OSC> INT.

8 Press the right-arrow key once. INT begins to flash off and on.

9 Press the up- or down-arrow key once. INT changes to EXT.

10 Press the Enter key.

11 Press the Chan Select key once to select the CHANNEL 1 input connector.

1 Performance Tests - Verifying Specifications

NOTE

12 Set the first Synthesizer (the one connected to the Counter’s rear-panel

Reference 10MHz connector) to output a 10 MHz, 1V rms, sine-wave signal.

13 Set the second Synthesizer (the one connected to the CHANNEL 1 input) to

output a 2 MHz, 100 mV rms, sine-wave signal.

14 Press and release the Counter’s Reset/Local key.

15 Verify that the Counter displays a reading of approximately 2 MHz and that the

Ext Ref annunciator is activated.

16 Mark Pass or Fail for Test 4 in the Performance Test Record on page 54.

This completes the Operational Verification.

– If you intend to perform the Complete Performance Tests next, do not

disconnect the cable from the Counter’s Reference 10 MHz connector. This connection is used in the Complete Performance Tests.

– Do not turn off the Counter if you intend to perform the Complete

Performance tests. Turning the Counter off and back on resets the reference oscillator (REF OSC) selection to internal (INT) and the channel selection to CHANNEL 2.

34 Keysight 53150A/151A/152A Assembly Level Service Guide

Complete Performance Tests

NOTE

The Complete Performance Tests verify the specifications of the Keysight 53150A/ 151A/152A Counter listed in Chapter 6, “Specifications”. All of these tests can be performed without opening the instrument. Tab le 1-2 lists a summary of the performance tests.

Record the results of the performance tests in the appropriate place on the Performance Test Record, which starts on page 54.

Table 1-2 Complete Performance Tests

Page Number Test Description

Page 36 Test 1: External Timebase Input Test

Page 36 Test 2: Channel 1 Frequency Sensitivity

Page 45 Test 3: Channel 2 Frequency Sensitivity

Performance Tests - Verifying Specifications 1

Page 49 Test 4: Channel 2 Power Measurement

Other Counter measurement functions (e.g., Averaging) are mathemati-cally derived by the microprocessor from the parameters verified by these performance tests. If the Counter passes the performance tests, the other measurement functions are also functioning to specifications.

Keysight 53150A/151A/152A Assembly Level Service Guide 35

1 Performance Tests - Verifying Specifications

NOTE

Test 1: External Timebase Input Test

This test verifies the 10 MHz external timebase specifications of the Counter by verifying that setting REF OSC to EXT allows the Counter to be synchronized to the external reference signal.

Equipment Required

Keysight 3325A/B Synthesizer (2) Keysight 10100C 50W Feedthrough Terminator Keysight 10503 Series Coaxial Cables (BNC m to m) (2)

– To ensure that the test results are valid, the Counter and the test equipment

should be powered on for at least 30 minutes prior to beginning the tests. This allows the internal temperatures of the equipment to stabilize.

– These tests are appropriate for the Keysight 53150A, 53151A, and 53152A

Counters.

1 MHz External Timebase Input Test

1 Connect an Keysight 10503 series coaxial cable between the output of the first

Keysight 3325A/B Synthesizer and the Reference 10MHz connector on the Counter’s rear panel (see Figure 1-2).

2 Connect the Keysight 10100C 50W Feedthrough Terminator to the Counter’s

CHANNEL 1 input connector.

3 Connect an Keysight 10503 series coaxial cable between the output of the

second Synthesizer and the Keysight 10100C 50W Feedthrough Terminator on the Counter’s CHANNEL 1 input connector.

36 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

Keysight 53150A/51A/52A Counter

Keysight 3325A/B Synthesizer

To Reference 10 MHz

Connector

(Rear Panel)

Output

Channel 1

Figure 1-2 External Timebase Test Setup

4 Cycle the POWER button to preset the Counter.

5 Press the Shift key on the Counter’s front panel.

Keysight 53150A/151A/152A Assembly Level Service Guide 37

6 Press the Menu key on the Counter’s front panel.

7 If necessary, use the up- and down-arrow keys to cycle the display until it

reads REF OSC> INT.

8 Press the right-arrow key once. INT begins to flash off and on.

9 Press the up- or down-arrow key once. INT changes to EXT.

10 Press the Enter key.

11 Press the Chan Select key once to select the CHANNEL 1 input connector.

1 Performance Tests - Verifying Specifications

12 Set the first Synthesizer (the one connected to the Counter’s rear-panel

Reference 10MHz connector) to output a 1 MHz, 1V rms, sine-wave signal.

13 Set the second Synthesizer (the one connected to the CHANNEL 1 input) to

output a 2 MHz, 100 mV rms, sine-wave signal.

14 Press and release the Counter’s Reset/Local key.

15 Verify that the Counter displays a reading of approximately 2 MHz and that the

Ext Ref annunciator is activated.

16 Mark Pass or Fail for Test 1a in the Performance Test Record on page 54.

2 MHz External Timebase Input Test

1 Change the frequency of the first Synthesizer (connected to the Counter’s

rear-panel Reference 10 MHz connector) to 2 MHz.

2 Press and release the Counter’s Reset/Local key.

3 Verify that the Counter displays a reading of approximately 2 MHz and that the

Ext Ref annunciator is activated.

4 Mark Pass or Fail for Test 1b in the Performance Test Record on page 54.

5 MHz External Timebase Input Test

1 Change the frequency of the first Synthesizer (connected to the Counter’s

rear-panel Reference 10 MHz connector) to 5 MHz.

2 Press and release the Counter’s Reset/Local key.

3 Verify that the Counter displays a reading of approximately 2 MHz and that the

Ext Ref annunciator is activated.

4 Mark Pass or Fail for Test 1c in the Performance Test Record on page 54.

38 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

10 MHz External Timebase Input Test

1 Change the frequency of the first Synthesizer (connected to the Counter’s

rear-panel Reference 10 MHz connector) to 10 MHz.

2 Press and release the Counter’s Reset/Local key.

3 Verify that the Counter displays a reading of approximately 2 MHz and that the

Ext Ref annunciator is activated.

4 Mark Pass or Fail for Test 1d in the Performance Test Record on page 54.

Keysight 53150A/151A/152A Assembly Level Service Guide 39

1 Performance Tests - Verifying Specifications

NOTE

Test 2: Channel 1 Frequency Sensitivity

This set of tests verifies the frequency-sensitivity specifications of Channel 1 of the Keysight 53150A/151A/152A Counters.

Equipment Required

Keysight 3325A/B Synthesizer Keysight 83650B Synthesizer Keysight 437B Power Meter Keysight 8487A/D Power Sensor Keysight 11730A Power Sensor Cable Keysight 11667C Power Splitter Keysight 8490D (Opt. 020) 20 dB Attenuator Keysight 1250-2015 BNC (m) to SMA (f) Adapter Keysight 11904A 2.92 mm (m) to 2.4 mm (m) Adapter Keysight 10503 Series Coaxial Cable (BNC m to m) 2 mm (m) to 2 mm (f) Cable (2)

Test 2a: 10 Hz to 20 MHz Frequency Sensitivity

This test is appropriate for the Keysight 53150A, 53151A, and 53152A Counters.

1 Connect an Keysight 10503 Series Coaxial Cable between the RF output

connector on the Keysight 3325A/B Synthesizer and Counter’s CHANNEL 1 connector.

40 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

Keysight 3325A/B Synthesizer

Keysight 53150A/51A/52A Counter

Output

Channel 1

Reference

Output

(Rear Panel)

To Reference 10 MHz

Connector (Rear Panel)

Figure 1-3 10 Hz to 20 MHz Frequency Sensitivity Test Setup

2 Verify that the Counter is still set to use an external reference signal (refer to

steps 5 through 10 on page 37).

3 Set the output of the Synthesizer to the first frequency specified for Test 2a in

the Performance Test Record on page 54 (10 Hz).

4 Set the power output of the Synthesizer to the first power value specified for

Test 2a in the Performance Test Record on page 54 (–14.9 dBm) (40 mV).

5 Record the frequency value read on the Counter (±1 count) for Test 2a in the

Performance Test Record on page 54.

6 Repeat steps 3, 4, and 5 for each of the remaining frequencies specified for

Test 2a. Don’t forget to change the power level when performing the 1 KHz test (–19.2 dBm) (25 mV).

7 If all of the frequency values you recorded for Test 2a are correct, mark Pass in

the Performance Test Record for Test 2a. If any of the frequency readings you recorded are incorrect, mark Fail in the Performance Test Record.

Keysight 53150A/151A/152A Assembly Level Service Guide 41

1 Performance Tests - Verifying Specifications

NOTE

– Do not disconnect the cable from the Counter’s Reference 10 MHz

connector. This connection is used in the following test.

– Do not turn off the Counter. Turning the Counter off and back on resets the

reference oscillator (REF OSC) selection to internal (INT) and the channel selection to CHANNEL 2.

Test 2b: 50 MHz to 125 MHz Frequency Sensitivity

1 Connect an Keysight 10100C 50 W Feedthrough Terminator to the CHANNEL 1

input connector on the Counter’s front panel (refer to Figure 1-4 for steps 1 through 9).

Keysight 83650B Synthesizer

Reference

Output

(Rear Panel)

Keysight 53150A/51A/52A Counter

To Reference 10 MHz

(Rear Panel)

(See Note Below)

Keysight 10100C 50

Feedthrough

Channel 1

RF Output

Keysight 8490D 20 dB Attenuator

Keysight 11904A 2.92 mm to 2.4 mm Adapter

Keysight 1250-2015 BNC to SMA Adapter

Keysight 437B Power Meter

Keysight 11667C

Power Splitter

Keysight 8487A/D

Power Sensor

Figure 1-4 50 MHz to 125 MHz Frequency Sensitivity Test Setup

If the 10 MHz reference output of the 53650B Synthesizer is not sufficient to drive the 53150A/51A/52A, reverse the test setup so that you drive the 83650B from the Counter.

input

42 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

2 Connect the Keysight 1250-2015 BNC (m) to SMA (f) Adapter to the

Keysight 10100C Feedthrough Terminator on the Counter’s CHANNEL 1 connector.

3 Connect the Keysight 11904A 2.92 mm (m) to 2.4 mm (m) Adapter to the

Keysight 1250-2015 Adapter.

4 Connect the Keysight 8490D 20 dB Attenuator to the Keysight 11904A

Adapter.

5 Connect one of the output connectors on the Keysight 11667C Power Splitter

to the Keysight 8490D Attenuator

6 Connect the Keysight 11900B 2.4 mm (f) to 2.4 mm (f) Adapter to the RF

output of the Synthesizer.

7 Connect a 2.4 mm (m) to 2.4 mm (m) cable between the Adapter on the

Synthesizer’s RF output connector and the input connector on the Keysight 11667C Power Splitter.

8 Connect the Keysight 8487A/D Power Sensor to the remaining output

connector on the Keysight 11667C Power Splitter.

9 Connect the Keysight 11730A Power Sensor Cable between the Power Sensor

and the sensor connector on the Keysight 437B Power Meter.

10 Verify that the Counter is still set to use an external reference signal (refer to

steps 5 through 10 on page 37).

11 Set the output of the Keysight 83650B Synthesizer to the first frequency

specified for Test 2b in the Performance Test Record on page 54 (50 MHz).

12 Set the power output of the Synthesizer (read on the Power Meter) to a power

value 20 dBm above the value specified for Test 2b in the Performance Test Record on page 54 (+.8 dBm). (The added 20 dBm compensates for the 20 dB Attenuator.)

Keysight 53150A/151A/152A Assembly Level Service Guide 43

1 Performance Tests - Verifying Specifications

NOTE

13 Record the frequency value read on the Counter (±1 count) for Test 2b in the

Performance Test Record on page 54.

14 Set the output of the Synthesizer to 125 MHz, and repeat steps 11

through 13.

15 If both of the frequency values you recorded for Test 2b are correct, mark Pass

in the Performance Test Record for Test 2b. If either of the frequency readings you recorded are incorrect, mark Fail in the Performance Test Record.

16 Disconnect the Keysight 10100C Feedthrough Terminator, the

Keysight 1250-2015 Adapter, and the Keysight 11904A Adapter from the Counter’s CHANNEL 1 connector.

– Do not disconnect the rest of the test setup, as these connections are also

used in the Channel 2 Frequency Sensitivity test.

– Do not turn off the Counter. Turning the Counter off and back on resets the

reference oscillator (REF OSC) selection to internal (INT).

44 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

NOTE

Test 3: Channel 2 Frequency Sensitivity

This set of tests verifies the frequency-sensitivity specifications of Channel 2 of the Keysight 53150A/151A/152A Counters.

Equipment Required

Keysight 83650B Synthesizer Keysight 437B Power Meter Keysight 8487A/D Power Sensor Keysight 11667C Power Splitter Keysight 11730A Power Sensor Cable Keysight 8490D (Opt. 020) 20 dB Attenuator Keysight 11904D 2.92 mm (m) to 2.4 mm (f) Adapter Keysight 10503 series Coaxial Cable (BNC m to m)

2.4 mm (m) to 2.4 mm (m) Cable (2)

Test 3a: 50 MHz to 20 GHz Frequency Sensitivity

This test is appropriate for the Keysight 53150A, 53151A, and 53152A Counters.

1 Connect the Keysight 11904D 2.92 mm (m) to 2.4 mm (f) Adapter to the

Counter’s CHANNEL 2 input connector (refer to Figure 1-5 for steps 1 through

4).

2 Connect the Keysight 8490D Attenuator to the Keysight 11904D Adapter,

as shown in Figure 1-5 (the other end of the Attenuator should remain connected to the Keysight 11667C Power Splitter).

3 Verify that the cable (with Adapter) is still connected between the RF output of

the Keysight 83650B Synthesizer and the Power Splitter input connector.

4 Verify that the Power Sensor is still connected to the Power Splitter and that

the Power Sensor Cable is still connected between the Power Sensor and the sensor connector on the Power Meter.

Keysight 53150A/151A/152A Assembly Level Service Guide 45

1 Performance Tests - Verifying Specifications

Keysight 11667C Power Splitter

Keysight 8487A/D Power Sensor

Keysight 8490D 20 dB Attenuator (50 MHz to 40 GHz tests only)

Keysight 83650B Synthesizer

Keysight 437B Power Meter

Keysight z11904D Adapter

Keysight 53150A/51A/52A Counter

input

Channel 2

RF Output

To Reference

Output

(Rear Panel)

To Reference 10 MHz

(Rear Panel)

Figure 1-5 50 MHz to 20 GHz Frequency Sensitivity Test Setup

5 Verify that the Counter is still set to use an external reference signal (refer to

steps 5 through 10 on page 37).

6 Set the output of the Keysight 83650B Synthesizer to the first frequency

specified for Test 3a in the Performance Test Record on page 55 (50 MHz).

7 Set the power output of the Synthesizer (read on the Power Meter) to a power

value 20 dBm above the value specified for Test 3a in the Performance Test Record on page 55 (0 dBm). (The added 20 dBm compensates for the 20 dB Attenuator.)

8 Record the frequency value read on the Counter (±1 count) for Test 3a in the

Performance Test Record on page 55.

9 Repeat steps 6, through 8 for each of the remaining frequencies specified for

Test 3a. Don’t forget to change the power level when performing the 400 MHz and 19 GHz tests (53150A, 53151A, and 53152A) and the 16 GHz and 19 GHz tests (53152A only).

46 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

NOTE

10 If all of the frequency values you recorded for Test 3a are correct, mark Pass in

the Performance Test Record. If any of the frequency readings you recorded are incorrect, mark Fail in the Performance Test Record.

Test 3b: 22 GHz to 26.5 GHz Frequency Sensitivity

This test is appropriate for the Keysight 53151A and 53152A Counters.

1 Use the same test setup as described for Test 3a on page 45.

2 Set the output of the Keysight 83650B Synthesizer to the first frequency

specified for Test 3b in the Performance Test Record on page 55 (22 GHz).

3 Set the power output of the Synthesizer (read on the Power Meter) to

a power value 20 dBm above the value specified for Test 3b in the Performance Test Record on page 55 (–5 dBm for the Keysight 53151A; –7 dBm for the Keysight 53152A). (The added 20 dBm compensates for the 20 dB Attenuator.)

4 Record the frequency value read on the Counter (±1 count) for Test 3b in the

Performance Test Record on page 55.

5 Repeat steps 2 through 4 for each of the remaining frequencies specified for

Test 3b.

6 If all of the frequency values you recorded for Test 3b are correct, mark Pass in

the Performance Test Record for Test 3b. If any of the frequency readings you recorded are incorrect, mark Fail in the Performance Test Record.

Keysight 53150A/151A/152A Assembly Level Service Guide 47

1 Performance Tests - Verifying Specifications

NOTE

Test 3c: 30 GHz to 46 GHz Frequency Sensitivity

This test is appropriate for the 53152A Counter only.

1 Use the same test setup as described for Test 3a on page 45.

2 Set the output of the Keysight 83650B Synthesizer to the first frequency

specified for Test 3c in the Performance Test Record on page 55 (30 GHz).

3 Set the power output of the Synthesizer (read on the Power Meter) to a power

value 20 dBm above the value specified for Test 3c in the Performance Test Record on page 55 (–3 dBm). (The added 20 dBm compensates for the 20 dB Attenuator.)

4 Record the frequency value read on the Counter (±1 count) for Test 3c in the

Performance Test Record on page 55.

5 Repeat steps 2, through 4 for each of the remaining frequencies specified for

Test 3c. Don’t forget to change the power level for the 42, 44, and 46 GHz tests.

6 If all of the frequency values you recorded for Test 3c are correct, mark Pass in

the Performance Test Record for Test 3c. If any of the frequency readings you recorded are incorrect, mark Fail in the Performance Test Record.

– Do not disconnect the Power Sensor or the Power Sensor Cable from the

power meter or the Power Splitter. These connections are reused in the following tests.

– Do not turn off the Counter. Turning the Counter off and back on resets the

reference oscillator (REF OSC) selection to internal (INT).

48 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

NOTE

Test 4: Channel 2 Power Measurement

This set of tests verifies the power-measurement specifications of Channel 2 of the Keysight 53150A/151A/152A Counters.

Equipment Required

Keysight 83650B Synthesizer Keysight 83051A Microwave Amplifier Keysight 437B Power Meter Keysight 8487A/D Power Sensor Keysight 11730A Power Sensor Cable Keysight 11667C Power Splitter Keysight 11904D 2.92 mm (m) to 2.4 mm (f) Adapter Keysight 11900A 2.4 mm (m) to 2.4 mm (m) Adapter Keysight 11900B 2.4 mm (f) to 2.4 mm (f) Adapter

2.4 mm (m) to 2.4 mm (m) Cable (2)

Test 4a: 50 MHz to 20 GHz Power Measurement (–20 dBm)

This test is appropriate for the Keysight 53150A, 53151A, and 53152A Counters.

1 Verify that the cable (with Adapter) is still connected to the RF output of the

Keysight 83650B Synthesizer.

2 Connect the other end of the 2.4 mm cable to the input connector on the

Keysight 83051A Microwave Amplifier.

3 Connect a 2.4 mm cable from the output of the Microwave Amplifier to the

input connector on the Keysight 11667C Power Splitter.

4 Verify that the Power Sensor is still connected to the Power Splitter and that

the Power Sensor Cable is still connected between the Power Sensor and the sensor connector on the Power Meter.

Keysight 53150A/151A/152A Assembly Level Service Guide 49

1 Performance Tests - Verifying Specifications

5 Connect the Keysight 11900A 2.4 mm (m) to 2.4 mm (m) Adapter to the

Counter’s CHANNEL 2 input connector.

6 Connect the unused output of the Microwave Splitter to the Adapter on the

Counter’s CHANNEL 2 input connector.

Keysight 83650B Synthesizer

Keysight

Microwave Amplier

Keysight 53150A/51A/52A Counter

83051A

Channel 2

Keysight

RF Output

Keysight

11900B Adapter

11667C Power Splitter

Keysight

8487A/D Power Sensor

437B Power Meter

Figure 1-6 50 MHz to 20 GHz (–20 dBm) Power Measurement Test

Setup

7 Verify that the Counter is still set to CHANNEL 2 (if necessary, use the Chan

Select key on the Counter’s front panel to select CHANNEL 2).

8 Adjust the power output of the Synthesizer so that the power output of the

Microwave Amplifier is –20 dBm.

9 Set the Synthesizer to the first frequency value listed for Test 4a in the

Performance Test Record on page 56 (50 MHz).

10 Record the actual power reading in the Performance Test Record.

Input

50 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

NOTE

11 Repeat steps 8 through 10 for each of the remaining frequency values listed for

Test 4a.

12 Mark Pass or Fail for Test 4a in the Performance Test Record.

Test 4b: Channel 2 22 GHz to 26.5 GHz Power Measurement (–20 dBm)

This test is appropriate for the Keysight 53151A and 53152A Counters.

1 Use the same test setup as described for Test 4a on page 49.

2 With the power output of the Microwave Amplifier still at –20 dBm (adjust the

power output of the Keysight 83650B Synthesizer, if necessary), set the Synthesizer to the first frequency value listed for Test 4b in the Performance Test Record on page 56 (22 GHz).

3 Record the actual power reading in the Performance Test Record.

4 Repeat steps 2 and 3 for each of the remaining frequency values listed for Test

4b.

5 Mark Pass or Fail for Test 4b in the Performance Test Record.

Keysight 53150A/151A/152A Assembly Level Service Guide 51

1 Performance Tests - Verifying Specifications

NOTE

Test 4c: Channel 2 26.5 GHz to 46 GHz Power Measurement (–20 dBm)

This test is appropriate for the Keysight 53152A Counter only.

1 Use the same test setup as described for Test 4a on page 49.

2 With the power output of the Microwave Amplifier still at –20 dBm (adjust the

power output of the Synthesizer, if necessary), set the Synthesizer to the first frequency value listed for Test 4c in the Performance Test Record on page 56 (30 GHz).

3 Record the actual power reading in the Performance Test Record.

4 Repeat steps 2 and 3 for each of the remaining frequency values listed

for Test 4c.

5 Mark Pass or Fail for Test 4c in the Performance Test Record.

Test 4d: Channel 2 50 MHz to 20 GHz Power Measurement (0 dBm)

This test is appropriate for the Keysight 53150A, 53151A, and 53152A Counters.

1 Use the same test setup as described for Test 4a on page 49.

2 Adjust the power output of the Synthesizer so that the power output of the

Microwave Amplifier is 0 dBm.

3 Set the Synthesizer to the first frequency value listed for Test 4d in the

Performance Test Record on page 57 (50 MHz).

4 Record the actual power reading in the Performance Test Record.

5 Repeat steps 2 through 4 for each of the remaining frequency values listed for

Test 4d.

6 Mark Pass or Fail for Test 4d in the Performance Test Record.

52 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

NOTE

Test 4e: Channel 2 22 GHz to 26.5 GHz Power Measurement (0 dBm)

This test is appropriate for the Keysight 53151A and 53152A Counters.

1 Use the same test setup as described for Test 4a on page 49.

2 With the power output of the Microwave Amplifier still at 0 dBm

(adjust the power output of the Synthesizer, if necessary), set the Synthesizer to the first frequency value listed for Test 4e in the Performance Test Record on page 57 (22 GHz).

3 Record the actual power reading in the Performance Test Record.

4 Repeat steps 2 and 3 for the remaining frequency values listed for Test 4e.

5 Mark Pass or Fail for Test 4e in the Performance Test Record.

Test 4f: Channel 2 30 GHz to 46 GHz Power Measurement (0 dBm)

This test is appropriate for the Keysight 53152A Counter only.

1 Use the same test setup as described for Test 4a on page 49.

2 With the power output of the Microwave Amplifier still at 0 dBm

(adjust the power output of the Synthesizer, if necessary), set the Synthesizer to the first frequency value listed for Test 4f in the Performance Test Record on page 57 (30 GHz).

3 Record the actual power reading in the Performance Test Record.

4 Repeat steps 2 and 3 for each of the remaining frequency values listed

for Test 4f.

5 Mark Pass or Fail for Test 4f in the Performance Test Record.

Keysight 53150A/151A/152A Assembly Level Service Guide 53

1 Performance Tests - Verifying Specifications

Performance Test Record (Page 1 of 4)

Keysight 53150A/151A/152A Microwave Frequency Counter

Serial Number: _________________________________________ Test Performed By: _____________________________________ Date: __________________________________________________

Notes: ____________________________________________________________________________________________________________

Pre Calibration Test ❏

Test

Number

1 Power on Self Tests N/A ❏❏

2 10 MHz Test 10,000,000 Hz ❏❏

3Run Self Test N/A ❏❏

4 10 MHz External Timebase Input Test 2 MHz ❏❏

Test

Number

1a 1 MHz External Timebase Input Test 2 MHz ❏❏

1b 2 MHz External Timebase Input Test 2 MHz ❏❏

1c 5 MHz External Timebase Input Test 2 MHz ❏❏

1d 10 MHz External Timebase Input Test 2 MHz ❏❏

Operational Verification Specifications

Complete

Performance Tests

Channel 1 Frequency Sensitivity ❏❏

10 Hz 30 Hz 1 kHz

500 kHz

5 MHz 10 MHz 20 MHz

Repair/Work Order No.: ________________________________ Temperature: __________________________________________ Relative Humidity: _____________________________________

Post Calibration Test ❏

Test Results

Pass Fail

Specifications

10 Hz @ 40 mV rms (–14.9 dBm) 30 Hz @ 40 mV rms (–14.9 dBm) 1 kHz @ 25 mV rms (–19.2 dBm)

500 kHz @ 25 mV rms (–19.2 dBm)

5 MHz @ 25 mV rms (–19.2 dBm) 10 MHz @ 25 mV rms (–19.2 dBm) 20 MHz @ 25 mV rms (–19.2 dBm)

Test Results

Pass Fail

_____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________

Channel 1 Frequency Sensitivity ❏❏

50 MHz

125 MHz

50 MHz @ 25 mV rms (–19.2 dBm)

125 MHz @ 25 mV rms (–19.2 dBm)

_____________________ _____________________

54 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

Performance Test Record (Page 2 of 4)

Test

Number

Complete

Performance Tests

Channel 2 Frequency Sensitivity 53150A 53151A 53152A ❏❏

50 MHz 100 MHz 250 MHz 300 MHz 500 MHz

1 GHz

2.5 GHz 5 GHz

10 GHz

12.4 GHz 16 GHz 18 GHz 19 GHz 20 GHz

Channel 2 Frequency Sensitivity 53150A 53151A 53152A ❏❏

22 GHz 24 GHz

26.5 GHz

Channel 2 Frequency Sensitivity 53150A 53151A 53152A ❏❏

30 GHz 34 GHz 40 GHz 42 GHz 44 GHz 46 GHz

–20 dBm

–33 dBm

–29 dBm

N/A N/A N/A

N/A N/A N/A N/A N/A N/A

" "

" " " " " " " "

Specifications

–20 dBm

" "

–33 dBm

" " " " " " " "

–29 dBm

–25 dBm

" "

N/A N/A N/A N/A N/A N/A

–20 dBm

" "

–33 dBm

" " " " " "

–30 dBm

–27 dBm

" "

–23 dBm

" "

–17 dBm

" "

Test Results

Pass Fail

_____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________

_____________________

_____________________ _____________________ _____________________

_____________________ _____________________ _____________________ _____________________ _____________________

____________________

Keysight 53150A/151A/152A Assembly Level Service Guide 55

1 Performance Tests - Verifying Specifications

Performance Test Record (Page 3 of 4)

Test

Number

Complete

Performance Tests

Power Measurement (–20 dBm): 53150A 53151A 53152A ❏❏

50 MHz

500 MHz

1 GHz 5 GHz

10 GHz

12.4 GHz 15 GHz 16 GHz 20 GHz

Power Measurement (–20 dBm): 53150A 53151A 53152A ❏❏

22 GHz 24 GHz

26.5 GHz

Power Measurement (–20 dBm): 53150A 53151A 53152A ❏❏

30 GHz 34 GHz 40 GHz 46 GHz

±1.5 dB

N/A N/A N/A

N/A N/A N/A N/A

" " " " " " " "

Specifications

±1.5 dB

" " " " " " " "

±2.0 dB

" "

N/A N/A N/A N/A

±1.0 dB

" " " "

±1.5 dB

" " "

±1.5 dB

" "

±2.0 dB

" " "

Test Results

Pass Fail

_____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________

_____________________ _____________________ _____________________

_____________________ _____________________ _____________________ _____________________

56 Keysight 53150A/151A/152A Assembly Level Service Guide

Performance Tests - Verifying Specifications 1

Performance Test Record (Page 4 of 4)

Test

Number

Complete

Performance Tests

Power Measurement (0 dBm): 53150A 53151A 53152A ❏❏

50 MHz

500 MHz

1 GHz 5 GHz

10 GHz

12.4 GHz 15 GHz 16 GHz 20 GHz

Power Measurement (0 dBm): 53150A 53151A 53152A ❏❏

22 GHz 24 GHz

26.5 GHz

Power Measurement (0 dBm): 53150A 53151A 53152A ❏❏

30 GHz 34 GHz 40 GHz 46 GHz

±1.5 dB

N/A N/A N/A

N/A N/A N/A N/A

" " " " " " " "

Specifications

±1.5 dB

" " " " " " " "

±2.0 dB

" "

N/A N/A N/A N/A

±1.0 dB

" " " "

±1.5 dB

" " "

±1.5 dB

" "

±2.0 dB

" " "

Test Results

Pass Fail

_____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________

_____________________ _____________________ _____________________

_____________________ _____________________ _____________________ _____________________

Keysight 53150A/151A/152A Assembly Level Service Guide 57

1 Performance Tests - Verifying Specifications

THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

58 Keysight 53150A/151A/152A Assembly Level Service Guide

Keysight 53150A/151A/152A Microwave Frequency Counter Assembly Level Service Guide

2 Service

Introduction 60 Returning the Counter to Keysight Technologies for Service 61 Calibration Procedure 63 Pre-Troubleshooting Information 65 Troubleshooting the Counter 70

2Service

Introduction

This chapter provides service information for your Keysight 53150A/151A/152A. It is divided into four major sections:

– Returning the Counter to Keysight Technologies for Service

(page 61). This section provides you with step-by-step instructions on how to return the instrument for service.

– Calibration Procedure (page 63). This section provides step-by-step

procedures for calibrating the Keysight 53150A/151A/152A.

– Pre-Troubleshooting Information (page 65). This section provides you with

pertinent information such as safety considerations, recommended test equipment, repair and after-service considerations, and assembly identification and location.

– Troubleshooting the Counter (page 70). This section provides you with

troubleshooting procedures that isolate the faulty assembly or module. Replacement and recalibration of most modules can only be performed at an authorized Keysight Technologies Service Center.

If the instrument is under warranty, return it to Keysight for service. Refer to “Returning the Counter to Keysight Technologies for Service” on page 61. If you decide to troubleshoot the instrument yourself, refer to the section titled “Troubleshooting the Counter” on page 70.

60 Keysight 53150A/151A/152A Assembly Level Service Guide

Service 2

NOTE

Returning the Counter to Keysight Technologies for Service

Providing Repair Information

Before shipping the Counter to an Keysight office for service or repair, call the nearest Keysight Sales Office to make arrangements. Then, tag and package the Keysight 53150A/151A/152A for shipment.

1-800-403-0801, and ask for Emergency Response or Express Calibration Service. When your Counter is repaired, it is returned via overnight shipment at

no extra charge.

1 Write the following information on a tag:

– Owner’s name and address

– Counter model number

– Complete serial number

– Description of service required or failure indications

2 Attach the tag to the instrument.

3 Pack the instrument.

If the original packaging materials are available, use the procedure titled “Packing the Counter in the Original Packaging Materials” If the original packaging materials are not available, you can order new packaging materials from an Keysight Sales Office. The new packaging materials are identical to those used by the factory when packaging new instruments. To use commercially available packaging materials, use the procedure titled “Packing

the Counter in Commercially Available Packaging Materials.” Both procedures

are on the following page.

Keysight 53150A/151A/152A Assembly Level Service Guide 61

2Service

Packing the Counter in the Original Packaging Materials

Packing the Counter in Commercially Available Packaging Materials

To prevent shipping damage, it is best to repack the Counter in its original packaging. In any correspondence, refer to the Counter by the model number and the complete serial number.

1 Disconnect the power cord, probes, cables, or other accessories attached to

the instrument.

2 Make sure the folded corrugated spacer (which normally contains the

manuals) is in the box to ensure proper fitting.

3 Make sure one of the polystyrene blocks is in its proper position in the box.

4 Place the instrument, front panel end first, on the polystyrene block.

5 Place the other polystyrene block on top of the rear end of the instrument to

secure it.

6 Do not return the manuals with the instrument. Return an accessory only when

it is a part of the failure symptoms.

7 Seal the shipping container securely.

If the original factory packaging materials are not available, use the following procedure to pack the Counter in commercially available shipping materials.

1 Wrap the instrument in heavy paper or plastic.

2 Place the instrument in a strong shipping container. Use a double-walled

carton made of at least 350 lb. test material.

3 Protect the control panel with cardboard.

4 Add a layer of shock-absorbing material that is 3 to 4 inches (70 to 100 mm)

thick around all sides of the instrument cushion it and to prevent it from moving within the container

5 Seal the shipping container securely.

6 Mark the shipping container FRAGILE.

62 Keysight 53150A/151A/152A Assembly Level Service Guide

Calibration Procedure

NOTE

Calibration Access Hole

There is only one calibration procedure that can be performed outside of an Keysight authorized service facility. The following procedure describes how to calibrate the Counter’s timebase.

The Counter should be powered on for at least 30 minutes prior to beginning the calibration procedure. This allows the internal temperature of the Counter and its timebase to stabilize.

Equipment Required

10 MHz Reference Standard Non-metallic adjustment tool for slotted screw head Keysight 10503 series Coaxial Cable

1 Connect an Keysight 10503 series coaxial cable from the output of your

10 MHz frequency standard to the Channel 1 input on the Counter’s front panel.

2 If there is a label covering the calibration adjustment access hole,

remove it (see Figure 2-1).

Service 2

Figure 2-1 Calibrating the Counter

Keysight 53150A/151A/152A Assembly Level Service Guide 63

2Service

3 Insert a non-metallic slotted adjustment tool through the hole in the

lower-right side of the Counter’s cover and into the slot in the timebase calibration screw.

4 Turn the calibration screw clockwise to increase the Counter’s reading or

counter-clockwise to decrease the reading until the frequency value displayed on the Counter’s front panel is exactly 10,000,000 Hz.

64 Keysight 53150A/151A/152A Assembly Level Service Guide

Pre-Troubleshooting Information

WARNING

This section contains the following pertinent troubleshooting information:

– Safety Considerations

– Recommended Test Equipment

– Repair Considerations

– After Service Considerations

– Assembly Identification and Location

Safety Considerations

Although this instrument has been designed in accordance with international safety standards, this guide contains information, cautions, and warnings which must be followed to ensure safe operation and to retain the instrument in a safe condition. Service instructions, and adjustment procedures requiring removal of the instrument cover, are for use by service-trained personnel only. To avoid dangerous electric shock, do not perform any servicing or make any adjustments with the cover removed, unless qualified to do so.

Service 2

Keysight 53150A/151A/152A Assembly Level Service Guide 65

BEFORE APPLYING AC POWER, THE INSTRUMENT AND ALL PROTECTIVE EARTH TERMINALS, EXTENSION CORDS, AUTO TRANSFORMERS, AND DEVICES CONNECTED TO THE INSTRUMENT SHOULD BE CONNECTED TO A PROTECTIVE EARTH GROUNDED SOCKET.

ANY INTERRUPTION OF THE PROTECTIVE GROUNDING CONDUCTOR INSIDE OR OUTSIDE THE INSTRUMENT OR DISCONNECTION OF THE PROTECTIVE EARTH TERMINAL WILL CAUSE A POTENTIAL SHOCK HAZARD THAT COULD RESULT IN PERSONAL INJURY. INTENTIONAL INTERRUPTION IS PROHIBITED.

Any maintenance and repair of the opened instrument under voltage should be avoided as much as possible and, if necessary, should be carried out only by a skilled person who is aware of the hazards involved (for example, fire and electric shock).

2Service

Recommended Test Equipment

Repair Considerations

Test equipment recommended for testing and troubleshooting the Keysight 53150A/151A/152A is listed in Chapter 1, “Performance Tests - Verifying

Specifications”. Substitute equipment may be used if it meets or exceeds the

required characteristics listed in Tab le 2-1.

Electrostatic Discharge

Electronic components and assemblies in the Keysight 53150A/151A/152A can be permanently degraded or damaged by electrostatic discharge. Use the following precautions when servicing the instrument:

1ENSURE that static-sensitive devices or assemblies are serviced at static-safe

work stations providing proper grounding for service personnel.

2ENSURE that static-sensitive devices or assemblies are stored in static

shielding bags or containers.

3DO NOT wear clothing subject to static-charge buildup, such as wool

or synthetic materials.

4DO NOT handle components or assemblies in carpeted areas.

5DO NOT remove an assembly or component from its static shielding protection

until you are ready to install it.

6AVOID touching component leads (handle by packaging only).

Surface Mount Repair

None of the assemblies in the Counter that use surface-mount components can be repaired outside of authorized Keysight Service Centers. Any attempt to repair these assemblies voids the Keysight factory warranty and makes the assemblies ineligible for return credit.

Disassembly and Reassembly Specifics

Refer to Chapter 3 of this guide, “Replacing Assemblies - Disassembly and

Reassembly,” for complete disassembly and reassembly instructions, and Chapter 4, “Replaceable Parts” for an exploded view of the instrument’s parts.

66 Keysight 53150A/151A/152A Assembly Level Service Guide

After Service Considerations

WARNING

Product Safety Checks

The following safety checks must be performed after any troubleshooting and repair procedures have been completed to ensure the safe operation of the instrument.

THE RESISTANCE CHECKS DESCRIBED IN THE FOLLOWING TEXT REQUIRE THAT THE POWER CORD BE CONNECTED TO THE INSTRUMENT AND THAT AC POWER BE DISCONNECTED. BE SURE THAT THE POWER CORD IS NOT CONNECTED TO AN AC POWER SOURCE BEFORE PERFORMING ANY SAFETY CHECKS.

1 VISUAL INSPECTION. Visually inspect the interior of the instrument for any

signs of abnormal internally generated heat, such as discolored printed circuit boards or components, damaged insulation, or evidence of arcing. Determine and remedy the cause of any such condition.

2 GROUND CONTINUITY TEST. Plug the power cord into the rear- panel power

receptacle. (DO NOT connect the instrument to AC power at this time.) Using a suitable ohmmeter, check resistance from the instrument's metallic connection (such as the rear panel or BNC ground collar) to the ground pin on the power cord plug. The reading must be less than 1Ω. Flex the power cord while making this measurement to determine whether intermittent discontinuities exist.

3 Check any indicated front- or rear-panel ground terminals marked,

using the above procedure.

Service 2

Keysight 53150A/151A/152A Assembly Level Service Guide 67

4 INSULATION RESISTANCE TEST. Tie the line and neutral pins of the power

cord plug together. Measure the resistance from the instrument enclosure (chassis) to the line and neutral pins of the power cord plug. The minimum acceptable resistance is 2 MΩ. Replace any component which results in a failure.

Product Performance Checks

After replacement of any functional assembly, perform the operational verification test in Chapter 1 of this guide, “Performance Tests - Verifying Specifications.”

2Service

Assembly Identification and Location

The assembly number, name, and Keysight part number for each of the Keysight 53150A, 53151A, and 53152A assemblies are listed in Table 2-1. Figure 2-2 illustrates the replaceable assemblies in the Keysight 53150A/151A/152A.

Tab le 2- 1 Keysight 53150A/151A/152A Assembly Identification

Assembly Name Keysight Part No.

A1 Adapter (53152A only) 53152-80001

A2 Cooling Fan Assembly 53150-80012

A3 Standby Power Switch Assembly 53150-80013

A4 Battery Housing Assembly

A5 DC/DC Converter PCB

A6 Battery

A7 Battery Sled Assembly

A8 Battery Cover Assembly 53150-00003

[a]

53150-00002

53150-60004

53150-80010

53150-00004

A9 Rear Panel Assembly —

A10 Power Entry Module Assembly 53150-40007

A11 Power Supply Assembly 0950-3299

A12 Rear Panel Power Switch Assembly 53150-60220

[a] With Option 002 (Battery Option) only.

68 Keysight 53150A/151A/152A Assembly Level Service Guide

Service 2

A11

A10

A12

Figure 2-2 Replaceable Assembly Locations — Top Internal View

Keysight 53150A/151A/152A Assembly Level Service Guide 69

2Service

WARNING

NOTE

Neutral

TB1 (AC In)

Line

Pin 8

TB2 (DC Out)

Pin 1

Approx. location of R23

Troubleshooting the Counter

Power Supply Check

HAZARDOUS VOLTAGES ARE PRESENT ON THE POWER SUPPLY ASSEMBLY. ONLY TRAINED AND QUALIFIED SERVICE PERSONNEL SHOULD PERFORM THE FOLLOWING PROCEDURE.

1 Remove the power cord from the back of the instrument.

2 Remove the cover as described in Chapter 3.

The DC Power Supply Assembly is fused for safety reasons. It must be assumed that, if the fuses are blown, the power supply has probably suffered damage and has therefore become unreliable. If the power supply fails, it must be replaced, even if the fuse in the power supply appears to be all that has failed.

3 Connect the Counter to the power source.

4 Connect the negative lead of a voltmeter to the chassis and measure each of

the voltages listed in Tab le 2-2 on Power Supply connectors TB1 and TB2 (see

Figure 2-3).

Figure 2-3 A4 DC Power Supply Test-Point Locations

70 Keysight 53150A/151A/152A Assembly Level Service Guide

Service 2

Table 2-2 lists A4 Power Supply's input and output voltages, the corresponding

wire color for each input and output, and the tolerances specified for these voltages.

Table 2-2 A4 Power Supply Inputs and Outputs

Input/Output Voltage Connector and Pin Designation Wire Color Tolerance

AC-input (neutral) 0 VAC

[a]

TB1, pin N blue —

AC-input (line in) 85 - 264 VAC

–15.0 VDC @ 0.7 A max. TB2, pin 1 lavender ±3%

0.0 VDC (ground for –15 VDC) TB2, pin 2 brown —

N/A (unused) TB2, pin position 3 (no pin) N/A —

N/A (unused) TB2, pin 4

+15.0 VDC @ 2 A max. TB2, pin 5 blue ±5%

0.0 VDC (ground for +15 VDC) TB2, pin 6 brown —

+5.0 VDC @ 5A max. TP 10 (bottom of motherboard) red ±1%

0.0 VDC (ground for +5 VDC) TB2, pin 8 black —

[a] AC-input values are referenced to chassis ground.

[a]

TB1, pin L

brown —

Adjusting the +5 VDC Output

The +5 VDC output of the power supply is adjustable. If this voltage is found to be outside of the tolerance range listed in Table 2 -2, it can be adjusted using R23, which is visible on the top surface of the power supply’s circuit board. When adjusting the +5 VDC output, use a non-metallic or insulated adjustment tool.

Keysight 53150A/151A/152A Assembly Level Service Guide 71

2Service

Self-Test

The Counter performs a Self-Test procedure when it is powered on. The Self-Test can also be invoked from the Counter’s Menu.

Running the Self Test

1 Disconnect all cables connected to the Counter’s front and rear signal

connectors.

2 Turn on the Main ~ Power switch on the Counter’s rear panel.

3 Press and release the Power button on the front panel.

4 Observe the front-panel display and note any error messages displayed.

5 When CH 2 NO SIGNAL is displayed, press and release the Shift key,

and then press and release the Menu key.

6 Press the up-arrow key or the down-arrow key repeatedly until DO SELF TEST

is displayed, and then press and release the Enter key.

7 Observe the front-panel display and note any error messages displayed.

72 Keysight 53150A/151A/152A Assembly Level Service Guide

Service 2

Self Test Error Messages

Table 2-3 lists and describes messages that are generated by the Counter during

Self-Test to indicate whether a component passed or failed its test. These messages are sent via the RS-232 serial output only—they do not appear on the Counter’s front-panel display.

Table 2-3 Self-Test Messages

Message Description

ROM TEST FAIL ROM TEST OK

ROM failed read test. ROM passed read test.

RAM DATA LINES OK RAM DATA ERROR RAM ADDR LINES OK RAM ADDR ERROR RAM TEST OK

EEPROM FAIL - CONFIGURATION DATA

ROM FAIL; Computed checkbyte does not match the value stored in EEPROM.

EEPROM FAIL - CONFIGURATION DATA; Needs to be (re)initialized.

EEPROM FAIL - POWER CAL DATA; Using default data

EEPROM FAIL - SAVED SETTINGS; Using default data

EEPROM FAIL - SAVED SETTINGS; Invalid EEPROM SAV n Data.

GPIB FAIL; Conf. Test The GPIB hardware failed its confidence test.

RAM data lines passed test. RAM data lines failed test. RAM address lines passed test. RAM address lines failed test. RAM tests completed with no errors detected.

The configuration data saved in EEPROM memory is defective.

The checksum of the ROM data does not match the value stored in EEPROM.

The EEPROM org code does not verify with current revision of ROM code.

The checksum of the EEPROM power-calibration table is bad. Factory default calibration data will be used.

The checksum of the user settings stored in EEPROM is bad. Factory default settings will be used.

The checksum of one set of user settings (1 – 9) stored in EEPROM is bad.

Keysight 53150A/151A/152A Assembly Level Service Guide 73

2Service

Tabl e 2-4 and Table 2-5 list and describe the messages that are generated by the

Counter during Self-Test or during operation to indicate that a problem has been detected. These messages are displayed on the Counter’s front-panel display and are also sent via the RS-232 serial output (in many cases, the exact message text that is displayed on the front panel is a condensed form of the message that is sent via RS-232).

Tab le 2- 4 Front Panel Display Error Messages

Message Description

12V FAIL The +12 VDC output from the power supply is not within specifications.

–12V FAIL The –12 VDC output from the power supply is not within specifications.

–5V FAIL The –5 VDC output from the power supply is not within specifications.

ADC FAIL Failure detected in the ADC.

PATH FAIL Failure detected in the Channel 1 signal path.

THRS FAIL Failure detected in the Channel 1 threshold circuit.

THRS FAIL Failure detected in the Channel 2 RF threshold circuit.

THRS THRU Failure detected in the Channel 2 through-path threshold circuit.

THRS HET Failure detected in the Channel 2 heterodyne-path threshold circuit.

EEP WRT FAIL Failure detected while writing to EEPROM.

FPANEL FAIL The front panel or its interconnecting cable is defective or not properly connected.

FPGA FAIL Failure detected in the FPGA (Field Programmable Gate Array).

GPIB FAIL Failure detected in the GPIB hardware.

HET PATH FAIL Failure detected in the heterodyne-path circuit.

IIC FAIL An attempt to write to the LCD display failed.

INSTCFG FAIL The instrument’s configuration data is missing or has become corrupted.

OVERTEMP The Counter’s internal temperature is above the acceptable limit.

PWR CAL FAIL The instrument’s power-calibration data is missing or corrupted.

PWR CKT FAIL Failure detected in the Channel 2 power-measurement circuit.

RAM FAIL Failure detected in RAM.

ROM FAIL Failure detected in ROM.

74 Keysight 53150A/151A/152A Assembly Level Service Guide

Table 2 -4 Front Panel Display Error Messages (continued)

Message Description

SAV SET FAIL One or more of the sets of user settings is missing or is corrupted.

SERVICE FAIL The instrument’s service data is missing or has become corrupted.

THRU FAIL Failure detected in the through-path circuit of Channel 2.

VCO/CNT FAIL Failure detected in the VCO or the Count Chain.

Table 2 -5 RS-232 Error Messages

Message Description

12V FAIL The +12 VDC output from the power supply is not within specifications.

–12V FAIL The –12 VDC output from the power supply is not within specifications.

–5V FAIL The –5 VDC output from the power supply is not within specifications.

ADC FAIL Failure detected in the ADC.

B1 SIGNAL PATH FAIL Failure detected in the Channel 1 signal path.

B1 THRESHOLD FAIL Failure detected in the Channel 1 threshold circuit.

Service 2

B2 RF THRESHOLD FAIL Failure detected in the Channel 2 RF threshold circuit.

B2 THROUGH-PATH THRESHOLD FAIL

B2 HETERODYNE PATH THRESHOLD FAIL

EEPROM FAIL - WRITE Failure detected while writing to EEPROM.

FRONT PANEL FAIL The front panel or its interconnecting cable are defective or not properly connected.

FPGA FAIL Failure detected in the FPGA (Field Programmable Gate Array).

GPIB FAIL Failure detected in the GPIB hardware.

HETERODYNE PATH FAIL Failure detected in the heterodyne-path circuit.

IIC FAIL An attempt to write to the LCD display failed.

INSTCFG FAIL The instrument’s configuration data is missing or corrupted.

OVER TEMPERATURE The Counter’s internal temperature is above the limit.

Failure detected in the Channel 2 through-path threshold circuit.

Failure detected in the Channel 2 heterodyne-path threshold circuit.

Keysight 53150A/151A/152A Assembly Level Service Guide 75

2Service

Tab le 2- 5 RS-232 Error Messages (continued)

Message Description

PWR CAL FAIL The instrument’s power-calibration data is missing or corrupted.

POWER METER FAIL Failure detected in the Channel 2 power-measurement circuit.

RAM FAIL Failure detected in RAM.

ROM FAIL Failure detected in ROM.

SAV SET FAIL One or more of the sets of user settings is missing or corrupted.

SERVICE FAIL The instrument’s service data is missing or corrupted.

THRU PATH FAIL Failure detected in the through-path circuit of Channel 2.

VCO/COUNT CHAIN FAIL Failure detected in the VCO or the Count Chain.

76 Keysight 53150A/151A/152A Assembly Level Service Guide

Keysight 53150A/151A/152A Microwave Frequency Counter Assembly Level Service Guide

3 Replacing Assemblies -

Disassembly and Reassembly

Introduction 78 Tools Required 79 Do This First 79 Removing the Bumpers 80 Removing the Handle and Handle Mounts 81 Removing the Rear Bezel 82 Removing the Shroud 84 Removing the Front Bezel 87 Removing the Rear Panel Assembly 88 Removing the Cooling Fan 91 Replacing the Power Supply 92

3 Replacing Assemblies - Disassembly and Reassembly

WARNING

CAUTION

NOTE

Introduction

This chapter provides instructions for removing major assemblies in the Keysight 53150A/151A/152A. To install an assembly, apply the removal instructions in reverse.

The following disassembly and repair procedures are provided:

– Removing the Bumpers pg. 80

– Removing the Handle and Handle Mounts pg. 81

– Removing the Rear Bezel pg. 82

– Removing the Shroud pg. 84

– Removing the Rear Panel Assembly pg. 88

– Removing the Cooling Fan pg. 91

– Replacing the Power Supply pg. 92

HAZARDOUS VOLTAGES ARE PRESENT ON THE POWER SUPPLY ASSEMBLY. DISCONNECT THE COUNTER FROM THE POWER SOURCE, AND WAIT AT LEAST SIX MINUTES BEFORE WORKING INSIDE THE INSTRUMENT.

Do not replace assemblies when the Counter is operating to prevent damage to components.

Unless otherwise stated, directional referents in the procedures in this chapter are accurate when viewing the Counter from the front.

Part numbers for all replaceable parts and assemblies are provided in Chapter 4, “Replaceable Parts”.

78 Keysight 53150A/151A/152A Assembly Level Service Guide

Tools Required

CAUTION

The following tools are required for the removal/replacement procedures in this chapter:

– #1 Phillips screwdriver

– #2 Phillips screwdriver

–TORX

– 1/4-inch open-end or box wrench

– 1/4-inch nut driver

– 5/16-inch nut driver

– Needle-nose pliers

Do This First

Perform the following steps before beginning any of the removal and replacement procedures:

1 If the Counter is on, press and release the POWER button on the front panel,

2 Disconnect the AC power cord from the AC input socket on the rear panel.

Replacing Assemblies - Disassembly and Reassembly 3

15 (T15) hand screwdriver

and then set the Main ~ Power switch on the rear panel to “0” (off).

3 If the Counter has the Battery Option (002) installed, remove the battery sled,

and disconnect any DC input cable from the EXT DC connector on the rear panel.

While most of the hardware used in the Counter is SAE, the four TORX screws that attach the handle mounts to the Counter are metric. To avoid damage to the threaded holes in the chassis that handle mount screws fit in, be sure to use the correct screws.

Keysight 53150A/151A/152A Assembly Level Service Guide 79

3 Replacing Assemblies - Disassembly and Reassembly

NOTE

Removing the Bumpers

Use the following procedure to remove the front and rear bumpers:

1 To remove the front bumper, lift the center of the top of the bumper upward,

stretch a corner of the bumper diagonally, then slide it off the front of the Counter.

Figure 3-1 Removing the Bumpers

2 Use the equivalent procedure for the rear bumper.

The bumpers can be used to support and protect the Counter after the shroud is removed. Place both bumpers on their inner edges on your work surface, and then place the Counter on top of them. The rear bumper can also serve as a holder for screws and other hardware temporarily removed from the Counter.

OPTIONS

80 Keysight 53150A/151A/152A Assembly Level Service Guide

Replacing Assemblies - Disassembly and Reassembly 3

TORX Screws

Handle Mount

Counter

NOTE

Removing the Handle and Handle Mounts

Use the following procedure to remove the carrying handle and handle mounts:

1 Rotate the handle to the vertical position above the Counter, pull the ends of

the handle outward at the mounts to detach it, and set it aside.

Figure 3-2 Removing the Handle

2 Remove the front bumper (see “Removing the Bumpers” on page 80).

3 Use a T15 TORX screwdriver to remove the two screws that attach each of the

handle mounts to the Counter, and remove the mounts.

Figure 3-3 Removing the Handle Mounts

When reattaching the handle mounts, limit the torque on the TORX screws to 4 to 5 inch-pounds.

Keysight 53150A/151A/152A Assembly Level Service Guide 81

3 Replacing Assemblies - Disassembly and Reassembly

NOTE

WARNING:

To avold electric shock, do not remove covers.

No user-serviceable parts inside. Refer all servicing to qualified personnel.

OPTIONS

001 Oven Time Base 002 Battery

This unit must be earth grounded.

Made in U.S.A.

with domestic and foreign content

11 TO 18 VDC

EXT DC

Reference 10 MHz

In or Out

Auxillary

RS-232

Main ~ Power

100 – 130 VAC, 50/60/400 Hz 75 VA 220 – 240 VAC, 50/60 Hz 75 VA 250 V

FUSE

1.0 A T

AC POWER

ISM 1-A

Removing the Rear Bezel

Use the following procedure to remove the rear bezel:

1 Remove the rear bumper (see “Removing the Bumpers” on page 80).

The rear bumper can be used as a holder for hardware and other small parts while they are temporarily removed from the Counter.

2 Use a #2 Phillips screwdriver to remove the two 6-32 pan-head machine

screws that attach the rear bezel to the rear panel of the Counter (see Figure 3-4).

Figure 3-4 Rear Bezel Mounting Screws

3 Use a #1 Phillips screwdriver to remove the three 4-40 x 3/16-inch

countersunk shroud screws on the top of the Counter near the back edge of the shroud (see Figure 3-5).

82 Keysight 53150A/151A/152A Assembly Level Service Guide

Replacing Assemblies - Disassembly and Reassembly 3

WARNING:

To avold electric shock, do not remove covers.

No user-serviceable parts inside. Refer all servicing to qualified personnel.

OPTIONS

001 Ove

n Time Base

002 Battery

This unit must be earth grounded.

Made in U.S.A.

with domestic and foreign content

AC POWER 100 – 130 VAC, 50/60/400 Hz

75 VA

220 – 240 VAC, 50/60 Hz

75 VA

250 V

FUSE

11 TO 18 VD

XT D

efere

nce

10 M

In or O

xillary

S-232

ain ~ P

1.0 A T

ISM 1-A

Shroud Screws

WARNING:

To avold electric shock,

do not remove covers.

No user-serviceable parts inside.

Refer all servicing to qualified personnel.

OPTIONS

001 Oven Time Base

002 Battery

This unit must be earth grounded.

Made in U.S.A.

with domestic and foreign c

ontent

AC POWER

100 – 130 VAC, 50/60/400 Hz 75 VA

220 – 240 VAC, 50/60 Hz 7

5 VA

250 V

FUSE

11 TO 18 VDC

EXT DC

Reference 10 MHz

Out

Auxillary

RS-232

Main ~ Power

1.0 A T

ISM 1-A

Shroud Screws

Figure 3-5 Top Rear Shroud Screws

4 Turn the Counter upside-down, and remove the three 4-40 x 3/16-inch

countersunk shroud screws on the bottom of the Counter near the back edge of the shroud (see Figure 3-6).

Figure 3-6 Bottom Rear Shroud Screws

5 Carefully work the rear bezel out of the back end of the shroud by alternately

pulling opposite corners of the bezel away from the Counter a small amount at a time. Do not use tools to pry the bezel out of the shroud, since this could damage it.

Keysight 53150A/151A/152A Assembly Level Service Guide 83

3 Replacing Assemblies - Disassembly and Reassembly

WARNING

NOTE

Removing the Shroud

Use the following procedure to remove the shroud:

WHEN THE SHROUD IS REMOVED FROM THE COUNTER, DANGEROUS LINE VOLTAGES THAT CAN CAUSE SERIOUS INJURY ARE EXPOSED. ALWAYS DISCONNECT THE POWER CORD BEFORE REMOVING THE SHROUD.

1 Remove the front and rear bumpers (see “Removing the Bumpers” on

page 80).

2 Remove the handle and the handle mounts (see “Removing the Handle and

Handle Mounts” on page 81).

3 Remove the rear bezel (see “Removing the Rear Bezel” on page 82).

4 Use a #1 Phillips screwdriver to remove the three 4-40 x 3/16-inch

countersunk shroud screws from the top of the Counter near the front edge of the shroud (see Figure 3-7).

84 Keysight 53150A/151A/152A Assembly Level Service Guide

Replacing Assemblies - Disassembly and Reassembly 3

ARNING:

To avold electric shock, do not remove covers. No user-serviceable parts inside. Refer all servic

ing to qualified personnel.

OPTIONS

001 Oven Time Base 002 Battery

This unit must be earth grounded.

Made in U.S.A.

with domestic and foreign content

AC PO

100 – 130 VA

, 50/6

0/400 Hz 75 V

220 – 240 VAC

, 50/60 H

z 75 VA

250 V

FUSE

11 TO 18 VD

EXT DC

Reference 10 MHz

In or Out

Auxillary

RS-232

Main ~ Power

1.0 A

ISM 1-A

Shroud Screws

WARNING:

To avold ele

ctric sh

ock,

do not remove covers.

No user-serviceable parts insid

Refer all serv

icing to q

ualified personnel.

OPTIONS

001 Oven Time Base

002 Battery

This unit must be earth grounded.

Made in U.S.A.

with domestic and foreign content

A C

100 – 130 VA

, 50/60/400 H

z 75 V

220 – 240 VA

, 50/60 H

z 75 VA

250 V

11 TO 18 VDC

EXT DC

Reference 10 MHz

Out

Auxillary

RS-232

Main ~ Power

1.0 A T

ISM 1-A

Shroud Screws

Figure 3-7 Top Front Shroud Screws

5 Turn the Counter upside-down, and remove the three 4-40 x 3/16-inch

countersunk shroud screws on the bottom of the Counter near the front edge of the shroud (see Figure 3-8).

Keysight 53150A/151A/152A Assembly Level Service Guide 85

Figure 3-8 Bottom Front Shroud Screws

3 Replacing Assemblies - Disassembly and Reassembly

WARNING:

To avold electric shock,

do not rem

ove covers.

No user-serviceable parts inside.

Refer all servicing to qualified personnel.

OPTIONS

001 Oven Time Base

002 Battery

This unit must be earth grounded.

Made in U.S.A.

with dom

estic and foreign c

ontent

AC POWER

100 – 130 VAC, 50/60/400 Hz

75 VA

220 – 240 VAC, 50/60 Hz 75 VA

250 V

FUSE

11 TO 18 VDC

EXT DC

Reference 10 MHz

Out

Auxillary

RS-232 RS-232

Main ~ Power

1.0 A T

ISM 1-A

6 With the Counter resting upside-down on your work surface, grip the front

edge of the shroud in the cutout of the front bezel with the fingers of one hand, and push the Counter’s rear panel toward the front of the shroud with your other hand. Reduce the amount of pressure you apply to the rear panel when the shroud begins to slide off the Counter, and carefully remove the shroud the rest of the way (see Figure 3-9).

Figure 3-9 Removing the Shroud

86 Keysight 53150A/151A/152A Assembly Level Service Guide

Removing the Front Bezel

Front

Bezel

Screws

Front Bezel Screws

CAUTION

Use the following procedure to remove the front bezel:

1 Remove the shroud hardware and slide the shroud back far enough to fully

expose the front bezel, or remove the shroud completely (see “Removing the

Shroud” on page 84).

2 Remove the four 4-40 x 3/16-inch self-locking flathead machine screws that

attach the front bezel to the front panel (two on top and two on the bottom as shown in Figure 3-10).

Replacing Assemblies - Disassembly and Reassembly 3

Figure 3-10 Front Bezel Screws

3 Carefully slide the front bezel off the front panel.

When reattaching the front bezel to the front-panel assembly, do not tighten the screws excessively to prevent damage to the bezel.

Keysight 53150A/151A/152A Assembly Level Service Guide 87

3 Replacing Assemblies - Disassembly and Reassembly

11 TO 18 VDC

EXT DC

Reference 10 MHz

In or Out

Auxillary

RS-232

Main ~ Power

Rear Panel Screws

Battery

Option

Screws

Removing the Rear Panel Assembly

Use the following procedure to remove the rear panel assembly:

1 Remove the shroud (see “Removing the Shroud” on page 84).

2 If the Battery Option is not installed, remove the four 4-40 self-locking hex

nuts that attach the battery opening cover to the rear panel (these nuts are accessible from inside the chassis). Then, remove the battery opening cover, and skip to step 5.

3 If the Battery Option is installed, remove the battery sled from the Counter (for

instructions on removing the battery sled, see Appendix C of the Keysight 53150A/151A/152A Operating Guide).

4 If the Battery Option is installed, remove the four 4-40 x 3/16-inch

self-locking flathead machine screws that attach the rear panel assembly to the Battery Option chassis as shown in Figure 3-11 (two screws on each side of the opening, and two more screws at the bottom of the opening).

Figure 3-11 Rear Panel Assembly Screws

5 Remove the six 4-40 x 3/16-inch self-locking flathead machine screws that

attach the rear panel assembly to the chassis (see Figure 3-11).

88 Keysight 53150A/151A/152A Assembly Level Service Guide

Replacing Assemblies - Disassembly and Reassembly 3

NOTE

The screw in the lower-left corner of the rear panel assembly (as viewed from the rear of the Counter) may be covered by the serial-number sticker. If it is, carefully cut away the lower-left corner of the sticker to expose the screw head.

6 Disconnect the seven-wire cable that runs between the connector at the back

end of the power supply (TB2) and connector PMAIN1 on the main board to provide better access to the cables that are attached to the back panel assembly.

7 Disconnect the GPIB ribbon cable from connector JP3 on the main board, and

disengage the ribbon cable from the ribbon-cable clamps that are attached to the power supply and the inside of the left wall of the chassis. Position this cable so that it cannot catch on any other cables or other components of the Counter.

8 Disconnect the external-reference input/output cable (coaxial) from connector

J8 on the main board. J8 is directly under the back edge of the power supply near the chassis wall.

9 A two-wire AC-input cable (brown and blue wires) runs between the Main ~

Power switch on the rear-panel assembly and the connector that is accessible

through the cutout in the right-front corner of the power supply enclosure (TB1). Disconnect this cable from the power supply.

When reinstalling the Rear Panel Assembly, be sure to route the two-wire AC-input cable (brown and blue wires) underneath the power supply.

10 If the Battery Option is installed, there is a two-wire cable (brown and white

wires) that runs between the Main ~ Power switch on the rear panel assembly and connector J3 on the Battery Option circuit board (J3 is the third connector from the back edge of the board). Disconnect this cable from J3 on the Battery Option circuit board.

Keysight 53150A/151A/152A Assembly Level Service Guide 89

3 Replacing Assemblies - Disassembly and Reassembly

WARNING

CAUTION

11 Use a 5/16-inch spin tight to remove the self-locking hex nut that attaches the

rear panel assembly grounding wire (green/yellow) to the right wall of the chassis. Slide the grounding lug off the welded stud on the chassis wall, and thread the lock nut back onto the stud a few turns until it is finger-tight.

AN ELECTRICAL SHOCK HAZARD EXISTS IF THE COUNTER IS OPERATED WITH THE REAR PANEL ASSEMBLY GROUNDING WIRE NOT PROPERLY CONNECTED TO THE CHASSIS. TO PREVENT SERIOUS INJURY AND/OR DAMAGE TO THE EQUIPMENT, NEVER OPERATE THE COUNTER UNLESS THIS GROUND WIRE IS SECURELY CONNECTED TO THE CHASSIS WALL AND THE REAR PANEL ASSEMBLY.

12 Extract the ends of all of the cables that you disconnected in Steps 7 through 9

from under the power supply, so that they are completely exposed and cannot catch on other cables and components when you remove the rear panel assembly.

13 Carefully pull the rear panel assembly away from the back end of the chassis.

Guide the cables that remain attached to the rear panel assembly as you remove it to prevent them from catching on other cables or other components of the Counter.

When reinstalling the Rear Panel Assembly, position it carefully to avoid damage to the power LED, the serial-port connector (RJ-12), and the main board. If these components are not correctly aligned with the openings in the back panel, they may be damaged.

90 Keysight 53150A/151A/152A Assembly Level Service Guide

Removing the Cooling Fan

Use the following procedure to remove the cooling fan:

1 Remove the shroud (see “Removing the Shroud” on page 84).

2 Disconnect the two-wire cooling-fan power cable (blue and red wires) from

J16 on the main board. J16 is the connector that is closest to the rear panel assembly near the right chassis wall and behind the power supply.

3 Open the two cable clamps that are attached to the floor of the chassis

immediately behind the front panel assembly, and remove the cooling-fan cable from the cable clamps.

4 Extract the end of the cooling-fan cable from under the power supply by

pulling it toward the front of the Counter with one hand while guiding the connector with your other hand.

5 Use a #1 Phillips screwdriver and a 1/4-inch wrench or spin tight to remove the

four 4-40 x 1-inch panhead machine screws and 1/4-inch self-locking hex nuts that attach the cooling fan to the chassis (see

Figure 3-12).

Replacing Assemblies - Disassembly and Reassembly 3

Figure 3-12 Cooling Fan Screws

6 While removing the cooling fan from the chassis, guide the cable to be sure it

does not catch on other cables or other components of the Counter.

Keysight 53150A/151A/152A Assembly Level Service Guide 91

3 Replacing Assemblies - Disassembly and Reassembly

Replacing the Power Supply

Use the following procedure to replace the power-supply circuit board:

1 Remove the shroud (see “Removing the Shroud” on page 84).

2 Disconnect the two power-supply connectors (one at the front and one at the

rear of the power supply).

3 Use a #1 Phillips screwdriver to remove the two pan-head screws and the two

star washers that fasten the perforated power-supply cover to the power-supply chassis. The screws are accessible through the rectangular cutout in the side of the Counter’s chassis.

4 Use a small flat-bladed screwdriver to pry the power-supply cover toward the

opening in the chassis to loosen it from the chassis.

5 Remove the power-supply cover by sliding it through the rectangular opening

in the side of the counter’s chassis.

6 Use a

7 Remove the two flat-head screws that are on both sides of the power-supply

8 Lift the circuit board up until it clears the power-supply cover mounting tabs,

9 Disassemble the replacement power supply in the same manner as described

10 Insert the circuit board from the new power supply into position in the

11 Insert the two screws removed in step 7 into the holes on both sides of the

12 Use a pair of needle-nose pliers to position one of the

¼-inch nut driver to remove the two nuts used to fasten the circuit

board to the power-supply chassis. You may have to hold the screws to prevent them from turning while removing the nuts. Do not discard the nuts, lock

washers,

nameplate.

and remove it from the chassis. Discard the defective circuit board.

in steps 3 through 8.

power-supply chassis inside the Counter.

power-supply nameplate. Do not tighten these screws at this time.

¼-inch spacers, and 5/8-inch flat-head screws.

¼-inch spacers

removed in step 6 between the circuit board and the power-supply chassis, and align the spacer with the mounting holes in the circuit board and the chassis.

92 Keysight 53150A/151A/152A Assembly Level Service Guide

Replacing Assemblies - Disassembly and Reassembly 3

13 Insert one of the 5/8-inch, flat-head screws removed in step 6 up through the

circuit-board mounting hole in the bottom of the power-supply chassis, through the spacer, and through the hole in the circuit board.

14 Place a lockwasher over the screw on top of the circuit board.

15 Thread a nut onto the screw, but do not tighten it fully at this time.

16 Repeat steps 12 through 15 for the other circuit-board mounting hole.

17 Tighten the two screws next to the power-supply nameplate.

18 Tighten the nuts on the circuit-board mounting screws.

19 Insert the power-supply cover through the rectangular hole in the side of the

counter’s chassis, and position in properly on the power-supply.

20 Insert the two screws that fasten the power-supply cover to the chassis and

tighten them.

21 Reconnect the two power-supply connectors and the front and rear ends of

the power supply.

22 Turn the Counter on, and perform the “Power Supply Check” procedure on

page 70.

23 If necessary, adjust the +5 VDC output of the power supply using the

procedure titled “Adjusting the +5 VDC Output” on page 71.

24 Reassemble the Counter.

Keysight 53150A/151A/152A Assembly Level Service Guide 93

3 Replacing Assemblies - Disassembly and Reassembly

THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

94 Keysight 53150A/151A/152A Assembly Level Service Guide

Keysight 53150A/151A/152A Microwave Frequency Counter Assembly Level Service Guide

4 Replaceable Parts

Introduction 96 Replaceable Parts 97 How To Order A Part 98 Parts Identification 100

4 Replaceable Parts

Introduction

This chapter contains parts-ordering information for the Keysight 53150A/151A/ 152A Counter. Table 4-1 lists the reference designations used in the parts list and throughout this guide, Table 4 -2 lists all replaceable assemblies and parts.

Figure 4-1 is an exploded view of the Keysight 53150A/151A/152A’s internal

parts, Figure 4-2 is an exploded view of the cabinet and other external parts, and

Figure 4-3 is a top view of the chassis with the shroud removed. These illustrations

are provided to help you locate and identify parts.

96 Keysight 53150A/151A/152A Assembly Level Service Guide

Replaceable Parts

Table 4-2 contains a list of replaceable parts that is organized as follows:

1 Electrical assemblies in alphanumeric order by reference designation.

2 Chassis-mounted electrical parts in alphanumeric order by reference

designation.

3 Chassis-mounted mechanical parts in alphanumeric order by reference

designation.

The information given for each part consists of the following:

1 Reference designation.

2 Keysight part number.

3 The quantity (QTY) of the part used in the instrument (field-replaceable items

only).

4 Description of the part.

5 Typical manufacturer's part number for the part (when available).

Replaceable Parts 4

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4 Replaceable Parts

How To Order A Part

Keysight Technologies wants to keep your parts ordering process as simple and efficient as possible. To order parts, perform the following steps:

1 Identify the part and the quantity you need.

2 Determine the ordering method to be used, and contact Keysight.

If the part you need is not identified in the guide, you can call Keysight for assistance (see the following section titled Contacting Keysight Technologies). Please have the following information available when you contact Keysight:

– Instrument Model Number (example, “Keysight 53151A”).

– Complete instrument Serial Number (example, “1234A56789”). Information

about where to find the serial number is provided in the Preface portion of this guide in the section titled How to Use This Guide.

– Description of the part(s) and its use.

– Quantity of the part(s) required.

98 Keysight 53150A/151A/152A Assembly Level Service Guide

Contacting Keysight Technologies

Depending on where you are in the world, there are one or more ways to obtain parts or parts information from Keysight Technologies.

– Outside the United States, contact your local Keysight Technologies sales

office.

– Within the United States, we encourage you to order replacement parts or

request parts information directly by telephone or mail from Keysight using the telephone numbers or address listed on the next page. (You can also contact your local Keysight sales office. Keysight sales offices are listed in “Sales and

Technical Support” on page 7.)

By Telephone:

– For Parts Ordering, use our toll-free number, (800) 227-8164,

Monday through Friday (except Holidays), 6 a.m. to 5 p.m. (Pacific Time).

– For Parts Identification Assistance, call us at (916) 783-0804.

Our Parts Identification hours are from 6 a.m. to 3 p.m. (Pacific Time) on Monday through Thursday and from 6 a.m. to 2 p.m. (Pacific Time) on Friday.

For Mail Correspondence, please use the address below:

Keysight Technologies P.O. Box 1145 Roseville, CA 95661-1145

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Keysight 53150A/151A/152A Assembly Level Service Guide 99

4 Replaceable Parts

Parts Identification

To identify the part(s) you need, refer to the exploded views in Figure 4-1 and

Figure 4-2 and the top view of the chassis in Figure 4-3.

When ordering from Keysight Technologies, the important numbers to note from the Parts List are the Keysight Part Number, the part-number check digit (in the “CD” column), and the quantity of the part(s) you need.

Reference Designations

Tabl e 4-1 lists the reference designations used in the parts lists.

Tab le 4- 1 Reference Designations

assembly hard ware electrical connector (stationary portion); jack miscellaneous mechanical part electrical connector (movable portion); plug

P/0 S T TP U W

part of

switch

transformer

test point

integrated circuit; microcircuit

cable; transmission path; wire

Cabinet Parts and Hardware

To locate and identify cabinet and external parts and mounting hardware, refer to

Figure 4-2 (internal parts and mounting hardware are shown in Figure 4-1). These

figures provide different views of the instrument, with the parts identified by reference designations; the reference designations correspond with the ones in

Tabl e 4-2 .

Accessories and Miscellaneous Items

Tabl e 4-3 lists all of the accessories available for the Counter and also

lists some other miscellaneous items, such as power cords, rack mounts, and manuals.

100 Keysight 53150A/151A/152A Assembly Level Service Guide

Keysight Technologies 53150A, 53152A, 53151A Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

List of Figures

List of Tables

In This Guide

How to Use This Guide

Repair Strategy

Instrument Identification

Instruments Covered by this Guide

Assembly-Level Service Guide Organization

How to Order Guides

Description of the Microwave Frequency Counter

Options

Hardware

Support

Accessories Supplied and Available

Accessories Supplied

Accessories Available

Manuals Supplied

Introduction

Operational Verification

Complete Performance Tests

Recommended Calibration Cycle

Test Record

Equipment Required

Operational Verification

Power-On Self Tests

10 MHz Test

Run Self Test

External Timebase Test

10 MHz External Timebase Input Test

Complete Performance Tests

Test 1: External Timebase Input Test

1 MHz External Timebase Input Test

2 MHz External Timebase Input Test

5 MHz External Timebase Input Test

10 MHz External Timebase Input Test

Test 2: Channel 1 Frequency Sensitivity

Test 2a: 10 Hz to 20 MHz Frequency Sensitivity

Test 2b: 50 MHz to 125 MHz Frequency Sensitivity

Test 3: Channel 2 Frequency Sensitivity

Test 3a: 50 MHz to 20 GHz Frequency Sensitivity

Test 3b: 22 GHz to 26.5 GHz Frequency Sensitivity

Test 3c: 30 GHz to 46 GHz Frequency Sensitivity

Test 4: Channel 2 Power Measurement

Test 4a: 50 MHz to 20 GHz Power Measurement (–20 dBm)

Test 4b: Channel 2 22 GHz to 26.5 GHz Power Measurement (–20 dBm)

Test 4c: Channel 2 26.5 GHz to 46 GHz Power Measurement (–20 dBm)

Test 4d: Channel 2 50 MHz to 20 GHz Power Measurement (0 dBm)

Test 4e: Channel 2 22 GHz to 26.5 GHz Power Measurement (0 dBm)

Test 4f: Channel 2 30 GHz to 46 GHz Power Measurement (0 dBm)

Performance Test Record (Page 1 of 4)

Performance Test Record (Page 2 of 4)

Performance Test Record (Page 3 of 4)

Performance Test Record (Page 4 of 4)

2 Service

Introduction

Returning the Counter to Keysight Technologies for Service

Providing Repair Information

Packing the Counter in the Original Packaging Materials

Packing the Counter in Commercially Available Packaging Materials

Calibration Procedure

Equipment Required

Pre-Troubleshooting Information

Safety Considerations

Recommended Test Equipment

Repair Considerations

After Service Considerations

Assembly Identification and Location

Troubleshooting the Counter

Power Supply Check

Self-Test

Introduction

Tools Required

Do This First

Removing the Bumpers

Removing the Handle and Handle Mounts