Assembly Level Service
Guide
This guide describes how to service the Agilent 53150A, 53151A, and
53152A Microwave Frequency Counters. The information in this guide
applies to instruments having the number prefix 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)
Agilent 53150A/151A/152A
Microwave Frequency Counter
Copyright Agilent
Technologies, Inc. 1999, 2002
All Rights Reserved.
Reproduction, adaptation, or
translations without prior
written permission is
prohibited, except as allowed
under the copyright laws.
Printed: August 2002
Printed in U.S.A.
Manual part number
53150-90015
Certification and Warranty
Certification
Agilent Technologies, Inc.
certifies that this product met
its published specification at the
time of shipment from the
factory. Agilent further certifies
that its calibration
measurements are traceable to
the United States National
Institute of Standards and
Technology (formerly National
Bureau of Standards), to the
extent allowed by the Institute’s
calibration facility, and to the
calibration facilities of other
International Standards
Organization members.
Warranty
Agilent warrants
Agilent hardware, accessories
and supplies against defects in
materials and workmanship for
a period of one year from date of
shipment. If Agilent receives
notice of such defects during the
warranty period, Agilent will, at
its option, either repair or
replace products which prove to
be defective. Replacement
products may be either new or
like-new.
Agilent warrants that
Agilent software will not fail to
execute its programming
instructions, for the period
specified above, due to defects in
material and workmanship
when properly installed and
used. If Agilent receives notice
of such defects during the
warranty period, Agilent will
replace software media which
does not execute its
programming instructions due
to such defects.
For detailed warranty
information, see back matter.
Safety Considerations
General
This product and related
documentation must be
reviewed for familiarization
with this safety markings and
instructions before operation.
Before Cleaning
Disconnect the product from
operating power before
cleaning.
Warning Symbols That May
Be Used In This Book
Instruction manual symbol; the
product will be marked with
this symbol when it is necessary
for the user to refer to the
instruction manual.
Indicates hazardous voltages.
Indicates earth (ground)
terminal.
or
Indicates terminal is connected
to chassis when such connection
is not apparent.
Indicates Alternating current.
Indicates Direct current.
Safety Considerations
(cont’d)
WARNING
BODILY INJURY OR DEATH
MAY RESULT FROM
FAILURE TO HEED A
WARNING. DO NOT
PROCEED BEYOND A
WARNING UNTIL THE
INDICATED CONDITIONS
ARE FULLY UNDERSTOOD
AND MET.
CAUTION
Damage to equipment, or
incorrect measurement data,
may result from failure to
heed a caution. Do not
proceed beyond a CAUTION
until the indicated conditions
are fully understood and met.
Safety Earth Ground
An uninterruptible safety earth
ground must be maintained
from the mains power source to
the product’s ground circuitry.
WARNING
WHEN MEASURING POWER
LINE SIGNALS, BE
EXTREMELY CAREFUL AND
ALWAYS USE A
STEP-DOWN ISOLATION
TRANSFORMER WHICH
OUTPUT IS COMPATIBLE
WITH THE INPUT
MEASUREMENT
CAPABILITIES OF THIS
PRODUCT. THIS PRODUCT’S
FRONT AND REAR PANELS
ARE TYPCIALLY AT EARTH
GROUND. THUS, NEVER TRY
TO MEASURE AC POWER
LINE SIGNALS WITHOUT AN
ISOLATION TRANSFORMER.
For additional safety and
acoustic noise information, see
back matter.
Agilent Technologies, Inc. 7.C.NL.06.15.01.R1.M.CW6FC
5301 Stevens Creek Boulevard
Santa Clara, California 95052-8059
Contents
How to Use This Guide vii
Repair Strategy vii
Instrument Identification viii
Instruments Covered by this Guide viii
Assembly-Level Service Guide Organization viii
How to Order Guides ix
Description of the Microwave Frequency Counter x
Options xi
Hardware xi
Support xi
Accessories Supplied and Available xii
Accessories Supplied xii
Accessories Available xii
Manuals Supplied xii
1 Performance Tests
Introduction 1-2
Operational Verification 1-2
Complete Performance Tests 1-3
Recommended Calibration Cycle 1-3
Test Record 1-3
Equipment Required 1-4
Operational Verification 1-5
Power-On Self Tests 1-5
10 MHz Test 1-6
Run Self Test 1-7
External Timebase Test 1-8
10 MHz External Timebase Input Test 1-8
Complete Performance Tests 1-11
Test 1: External Timebase Input Test 1-12
1 MHz External Timebase Input Test 1-12
2 MHz External Timebase Input Test 1-14
5 MHz External Timebase Input Test 1-14
10 MHz External Timebase Input Test 1-15
Assembly Level Service Guide iii
Contents
Test 2: Channel 1 Frequency Sensitivity 1-16
Test 2a: 10 Hz to 20 MHz Frequency Sensitivity 1-16
Test 2b: 50 MHz to 125 MHz Frequency Sensitivity 1-18
Test 3: Channel 2 Frequency Sensitivity 1-21
Test 3a: 50 MHz to 20 GHz Frequency Sensitivity 1-21
Test 3b: 22 GHz to 26.5 GHz Frequency Sensitivity 1-23
Test 3c: 30 GHz to 46 GHz Frequency Sensitivity 1-24
Test 4: Channel 2 Power Measurement 1-25
Test 4a: 50 MHz to 20 GHz Power Measurement
(–20 dBm) 1-25
Test 4b: Channel 2 22 GHz to 26.5 GHz Power Measurement
(–20 dBm) 1-27
Test 4c: Channel 2 26.5 GHz to 46 GHz Power Measurement
(–20 dBm) 1-28
Test 4d: Channel 2 50 MHz to 20 GHz Power Measurement
(0 dBm) 1-28
Test 4e: Channel 2 22 GHz to 26.5 GHz Power Measurement
(0 dBm) 1-29
Test 4f: Channel 2 30 GHz to 46 GHz Power Measurement
(0 dBm) 1-29
Performance Test Record (Page 1 of 4) 1-30
Performance Test Record (Page 2 of 4) 1-31
Performance Test Record (Page 3 of 4) 1-32
Performance Test Record (Page 4 of 4) 1-33
2Service
Introduction 2-2
Returning the Counter to
Agilent Technologies for Service 2-3
Providing Repair Information 2-3
Packing Counter in Original Packaging Materials 2-4
Packing Counter in Other Packaging Materials 2-4
Calibration Procedure 2-6
Equipment Required 2-6
iv Assembly Level Service Guide
Contents
Pre-Troubleshooting Information 2-8
Safety Considerations 2-8
Recommended Test Equipment 2-9
Repair Considerations 2-9
Electrostatic Discharge 2-9
Surface Mount Repair 2-10
Disassembly and Reassembly Specifics 2-10
After Service Considerations 2-10
Product Safety Checks 2-10
Product Performance Checks 2-11
Assembly Identification and Location 2-11
Troubleshooting the Counter 2-13
Power Supply Check 2-13
Adjusting the +5 VDC Output 2-14
Self-Test 2-15
Running the Self Test 2-15
Self Test Error Messages 2-16
3 Replacing Assemblies
Introduction 3-2
Tools Required 3-3
Do This First 3-3
Removing the Bumpers 3-4
Removing the Handle and Handle Mounts 3-5
Removing the Rear Bezel 3-6
Removing the Shroud 3-8
Removing the Front Bezel 3-11
Removing the Rear Panel Assembly 3-12
Removing the Cooling Fan 3-15
Replacing the Power Supply 3-16
Assembly Level Service Guide v
Contents
4Replaceable Parts
Introduction 4-2
Replaceable Parts 4-2
How To Order A Part 4-3
Contacting Agilent Technologies 4-4
Parts Identification 4-5
Reference Designations 4-5
Cabinet Parts and Hardware 4-5
Accessories and Miscellaneous Items 4-5
5 Backdating
Introduction 5-2
6 Specifications
Introduction 6-2
Measurement Specifications and Characteristics 6-3
Typical power measurement uncertainty
at 25°C for various input levels 6-5
Typical power measurement uncertainty
at −25 dBm input level 6-6
vi Assembly Level Service Guide
In This Guide
This guide provides assembly-level service information for the
Agilent 53150A, 53151A, and 53152A Counters.
How to Use This Guide
Repair Strategy
This service guide is designed to isolate failures to the assembly level only.
The Agilent 53150A/151A/152A Counter can be returned to Agilent for all
service work, including troubleshooting, and verifying specifications.
Contact your nearest Agilent Sales and Service Office for more details.
NOTE ISD (Instrument Service Division) Emergency Response or Express
Calibration Service is available for Agilent 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). 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.
NOTE If the motherboard, the sampler, or the front-panel assembly are
defective, the instrument must be returned to an Agilent Service Center
for repair and recalibration.
Assembly Level Service Guide vii
In This Guide
Instrument Identification
The instrument is identified by the serial number on the rear panel.
Agilent 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. Agilent-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 Agilent 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 Agilent Sales Office listed at
the back of this guide.
Assembly-Level Service Guide Organization
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 provides procedures that verify the
Counter operates properly and meets the Agilent 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 Agilent for service, calibrating
the Counter, and troubleshooting the assemblies in the Counter.
Chapter 3 Replacing Assemblies provides procedures for replacing
defective assemblies and/or modules in the Counter.
viii Assembly Level Service Guide
In This Guide
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 Agilent 53150A/151A/152A Counter.
How to Order Guides
The part number for this guide is listed on the Certification and Warranty
page (on the back of the title page) and on the back cover of this guide.
Assembly Level Service Guide ix
In This Guide
Description of the Microwave Frequency Counter
The Agilent 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 Agilent 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 Agilent 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 Agilent 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
• 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 Agilent
53150A, 53151A, and 53152A.
x Assembly Level Service Guide
In This Guide
Options
The options available for the Agilent 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.
Hardware
• 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)
NOTE Hardware options can be retrofitted at an Agilent 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 Agilent for Repair, Option W30
• 3-year Return to Agilent for Calibration, Option W32
• 3-year Return to Agilent for Standards Compliant Calibration,
Option W34
• 5-year Return to Agilent for Repair, Option W50
• 5-year Return to Agilent for Calibration, Option W52
• 5-year Return to Agilent for Standards Compliant Calibration,
Option W54
Assembly Level Service Guide xi
In This Guide
Accessories Supplied and Available
Accessories Supplied
• Power cord, 2.3 meters (part number dependent upon destination country)
• Fuse (Agilent P/N 2110-0007)
Accessories Available
• Accessories for use with Option 002 (Battery/DC Power Input):
– Automotive Power Adapter (Agilent P/N 53150-60214)
– Battery (Agilent P/N 53150-80010)
– Battery Charger (Agilent P/N 53150-60217) 115V
(includes Automotive Power Adapter)
– Battery Charger (Agilent P/N 53150-60218) 230V
(includes Automotive Power Adapter)
– GPIB Cables (Agilent P/N 10833A/B/C/D)
• RS-232 Cable (Agilent P/N 53150-60215)
• Soft Carrying Case (Agilent P/N 53150-80016) — same as Option 007
• Rack Mount Kit (Agilent P/N 53150-67001) — same as Option 1CM
Manuals Supplied
Agilent 53150A/151A/152A Operating Guide
(Agilent P/N 53150-90013)
Agilent 53150A/151A/152A Programming Guide
(Agilent P/N 53150-90014)
Agilent 53150A/151A/152A Assembly-Level Service Guide
(Agilent P/N 53150-90015)
xii Assembly Level Service Guide
1
Performance Tests
Verifying Specifications
Chapter 1 Performance Tests
Introduction
Introduction
1
This chapter provides procedures to test the electrical performance of the
Agilent 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. 1-2
• Equipment Required pg. 1-4
• Operational Verification pg. 1-5
• Complete Performance Tests pg. 1-11
• Performance Test Record pg. 1-30
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.
1-2 Assembly Level Service Guide
Chapter 1 Performance Tests
Introduction
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.
1
Assembly Level Service Guide 1-3
Chapter 1 Performance Tests
Equipment Required
Equipment Required
1
Table 1-1 lists the test equipment and accessories needed to perform the tests.
Table 1-1. Recommended Test Equipment and Accessories
Model
Instrument Type Required Characteristics
Synthesized Signal Generator 10 Hz to 20 MHz
+7 dBm to –40 dBm
Microwave Synthesized
Signal Generator
Microwave Amplifier 45 MHz to 50 GHz Agilent 83051A 1 P, T
Power Meter 50 MHz to 50 GHz
Power Sensor 50 MHz to 50 GHz
Power Sensor Cable 2.4 mm to 2.4 mm, 5 ft. Agilent 11730A 1 P, T
50 Ω Feedthrough Terminator 50 Ω (m to f) BNC Agilent 10100C 1 OV, P, T
20 dB Attenuator DC to 50 GHz
Power Splitter DC to 50 GHz
Cables BNC (m) to BNC (m)
Adapters BNC (m) to SMA (f)
* Equivalent equipment can be substituted for all instruments and accessories.
** OV = Operational Verification P = Performance Tests C = Calibration T = Troubleshooting
10 MHz to 50 GHz
Accuracy >1 x 10
+7 dBm to –50 dBm
+13 dBm to –50 dBm
+13 dBm to –50 dBm
2.4 mm (m) to 2.4 mm (f)
2.4 mm (f3x)
2.4 mm (m) to 2.4 mm (m)
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 *
Agilent 3325A/B 2 OV, P, T
Agilent 83650B 1 P, T
Agilent 437B 1 P, T
Agilent 8487A/D 1 P, T
Agilent 8490D
(Opt. 020)
Agilent 11667C/D 1 P, T
Agilent 10503 series—2
Agilent 1250-2015
—
Agilent 11904A
Agilent 11904D
Agilent 11900A
Agilent 11900B
Quantity
Required Use **
1P, T
OV, P, C, T
2
1
1
1
1
1
P, T
1-4 Assembly Level Service Guide
Chapter 1 Performance Tests
Operational Verification
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.
If you are not familiar with operating the Counter, you should review
Chapter 1, “Getting Started,” in the Agilent 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
NOTE This test is appropriate for the Agilent 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.
NOTE Since the Counter’s power supply automatically senses the line voltage,
there is no AC input-voltage setting.
1
4 Turn on the Main ~ Power switch on the Counter’s rear panel.
NOTE 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.
Assembly Level Service Guide 1-5
Chapter 1 Performance Tests
Operational Verification
6 Verify that the front-panel display shows the following:
• All segments of the front-panel display are temporarily activated.
1
NOTE To ensure that the test results are valid, the Counter and the test
• 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 1-30, Test 1.
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 1-30, Test 2.
1-6 Assembly Level Service Guide
Chapter 1 Performance Tests
Operational Verification
Run Self Test
NOTE This test is appropriate for the Agilent 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.”
1
6 Mark Pass or Fail in the Performance Test Record on page 1-30, Test 3.
Assembly Level Service Guide 1-7
Chapter 1 Performance Tests
Operational Verification
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
1
NOTES • To ensure that the test results are valid, the Counter and the test
be synchronized to the external reference signal.
Equipment Required
Agilent 3325A/B Synthesizer (2)
Agilent 10100C 50 Ω Feedthrough Terminator
Agilent 10503 Series Coaxial Cables (BNC m to m) (2)
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 Agilent 53150A, 53151A, and
53152A Counters.
10 MHz External Timebase Input Test
1 Connect an Agilent 10503 series coaxial cable between the output of the
first Agilent 3325A/B Synthesizer and the Reference 10MHz connector on
the Counter’s rear panel (see Figure 1-2).
2 Connect the Agilent 10100C 50 Ω Feedthrough Terminator to the
Counter’s CHANNEL 1 input connector.
3 Connect an Agilent 10503 series coaxial cable between the output of the
second Synthesizer and the Agilent 10100C 50Ω Feedthrough Terminator
on the Counter’s CHANNEL 1 input connector.
1-8 Assembly Level Service Guide
Chapter 1 Performance Tests
Operational Verification
To Reference 10 MHz
Connector
(Rear Panel)
Agilent 3325A/B Synthesizer
1
Output
Agilent
53150A/51A/52A
Counter
Channel 1
Agilent 3325A/B Synthesizer
Output
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.
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.
Assembly Level Service Guide 1-9
Chapter 1 Performance Tests
Operational Verification
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.
1
NOTES • If you intend to perform the Complete Performance Tests next, do not
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 1-30.
This completes the Operational Verification.
disconnect the cable from the Counter’s Reference 10MHz 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.
1-10 Assembly Level Service Guide
Chapter 1 Performance Tests
Complete Performance Tests
Complete Performance Tests
The Complete Performance Tests verify the specifications of the
Agilent 53150A/151A/152A Counter listed in Chapter 6, “Specifications.”
All of these tests can be performed without opening the instrument.
Table 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 1-30.
NOTE 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.
Table 1-2. Complete Performance Tests
Page Number Test Description
Page 1-12 Test 1: External Timebase Input Test
Page 1-12 Test 2: Channel 1 Frequency Sensitivity
Page 1-21 Test 3: Channel 2 Frequency Sensitivity
Page 1-25 Test 4: Channel 2 Power Measurement
1
NOTE 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.
Assembly Level Service Guide 1-11
Chapter 1 Performance Tests
Test 1: External Timebase Input Test
Test 1: External Timebase Input Test
1
NOTES • To ensure that the test results are valid, the Counter and the 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
Agilent 3325A/B Synthesizer (2)
Agilent 10100C 50 Ω Feedthrough Terminator
Agilent 10503 Series Coaxial Cables (BNC m to m) (2)
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 Agilent 53150A, 53151A, and
53152A Counters.
1 MHz External Timebase Input Test
1 Connect an Agilent 10503 series coaxial cable between the output of the
first Agilent 3325A/B Synthesizer and the Reference 10MHz connector on
the Counter’s rear panel (see Figure 1-2).
2 Connect the Agilent 10100C 50 Ω Feedthrough Terminator to the
Counter’s CHANNEL 1 input connector.
3 Connect an Agilent 10503 series coaxial cable between the output of the
second Synthesizer and the Agilent 10100C 50Ω Feedthrough Terminator
on the Counter’s CHANNEL 1 input connector.
1-12 Assembly Level Service Guide
Chapter 1 Performance Tests
Test 1: External Timebase Input Test
Agilent 3325A/B Synthesizer
To Reference 10 MHz
Connector
(Rear Panel)
1
Output
Agilent
53150A/51A/52A
Counter
Channel 1
Agilent 3325A/B Synthesizer
Output
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.
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.
Assembly Level Service Guide 1-13
Chapter 1 Performance Tests
Test 1: External Timebase Input Test
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.
1
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 1-30.
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 1-30.
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 1-30.
1-14 Assembly Level Service Guide
Chapter 1 Performance Tests
Test 1: External Timebase Input Test
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 1-30.
1
Assembly Level Service Guide 1-15
Chapter 1 Performance Tests
Test 2: Channel 1 Frequency Sensitivity
Test 2: Channel 1 Frequency Sensitivity
1
This set of tests verifies the frequency-sensitivity specifications of
Channel 1 of the Agilent 53150A/151A/152A Counters.
Equipment Required
Agilent 3325A/B Synthesizer
Agilent 83650B Synthesizer
Agilent 437B Power Meter
Agilent 8487A/D Power Sensor
Agilent 11730A Power Sensor Cable
Agilent 11667C Power Splitter
Agilent 8490D (Opt. 020) 20 dB Attenuator
Agilent 1250-2015 BNC (m) to SMA (f) Adapter
Agilent 11904A 2.92 mm (m) to 2.4 mm (m) Adapter
Agilent 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
NOTE This test is appropriate for the Agilent 53150A, 53151A, and 53152A
Counters.
1 Connect an Agilent 10503 Series Coaxial Cable between the RF output
connector on the Agilent 3325A/B Synthesizer and Counter’s CHANNEL 1
connector.
1-16 Assembly Level Service Guide
Chapter 1 Performance Tests
Test 2: Channel 1 Frequency Sensitivity
Agilent 3325A/B Synthesizer
Reference
Output
(Rear Panel)
1
To Reference 10 MHz
Connector (Rear Panel)
Agilent
53150A/51A/52A
Counter
Output
Channel 1
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 1-13).
3 Set the output of the Synthesizer to the first frequency specified for
Test 2a in the Performance Test Record on page 1-30 (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 1-30 (–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 1-30.
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.
Assembly Level Service Guide 1-17
Chapter 1 Performance Tests
Test 2: Channel 1 Frequency Sensitivity
NOTES • Do not disconnect the cable from the Counter’s Reference 10MHz
connector. This connection is used in the following test.
1
• 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 Agilent 10100C 50 Ω Feedthrough Terminator to the
CHANNEL 1 input connector on the Counter’s front panel (refer to
Figure 1-4 for steps 1 through 9).
Agilent 83650B Synthesizer
Reference
Output
(Rear Panel)
Agilent
53150A/51A/52A
Counter
To Reference 10 MHz
(Rear Panel)
(See Note Below)
Agilent 10100C 50
Feedthrough
Channel 1
RF Output
Agilent 8490D 20 dB Attenuator
Agilent 11904A 2.92 mm to 2.4 mm Adapter
Agilent 1250-2015 BNC to SMA Adapter
Agilent 437B Power Meter
Agilent 11667C
Power Splitter
Agilent 8487A/D
Power Sensor
input
Figure 1-4. 50 MHz to 125 MHz Frequency Sensitivity Test Setup
NOTE 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.
1-18 Assembly Level Service Guide
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