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Errata
Title & Document Type: 4195A Spectrum Network/Analyzer Maintenance Manual
Manual Part Number: 04195-90100
Revision Date: November 1989
HP References in this Manual
This manual may contain references to HP or Hewlett-Packard. Please note that Hewlett-
Packard's former test and measurement, semiconductor products and chemical analysis
businesses are now part of Agilent Technologies. We have made no changes to this
manual copy. The HP XXXX referred to in this document is now the Agilent XXXX.
For example, model number HP8648A is now model number Agilent 8648A.
About this Manual
We've added this manual to the Agilent website in an effort to help you support your
product. This manual provides the best information we could find. It may be incomplete
or contain dated information, and the scan quality may not be ideal. If we find a better
copy in the future, we will add it to the Agilent website.
Support for Your Product
Agilent no longer sells or supports this product. You will find any other available
product information on the Agilent Test & Measurement website:
www.tm.agilent.com
Search for the model number of this product, and the resulting product page will guide
you to any available information. Our service centers may be able to perform calibration
if no repair parts are needed, but no other support from Agilent is available.
MANUAL CHANGES
HP 4195A MANUAL IDENTIFICATION
Network/Spectrum Analyzer Model Number: HP 4195A
Date Printed: November 1989
Part Number: 04195-90100
Thlm supplement conlainm Information for correetlng manual errom and for adaptlng the manual to newer Instruments that contaln Improvemenla
or modlflcatlonm not documented In the exlstlng manual.
To use thlm m lement
u
1. ~ a k a11~ R A T cornctlonm
e A
2. Make all approprlate merlal-number-related changer llmted below
SERIAL PREFIX OR NUMBER MAKE MANUAL CHANGES SERIAL PREFIX OR NUMBER MAKE MANUAL CHANGES
ALL 1
b New Item
CHANGE 1
b Section 2. PERFORMANCE TESTS, Page 2-22, Paragraph 2-14. LEVEL ACCURACY/FLATNESS TEST
- Change Level Flatness Specification to 22.9 dB (from +IdB).
.5
b Section 2. PERFORMANCE TESTS, Pages 6 and 7 of PERFORMANCE TEST RECORD
Change the Flatness test limits to k2.9 dB (from k 1.5 dB).
NOTE
Manual change m plamentm a n nvlmed a onen a necemury to kee manualm a cumnt and accurate a pommlble. Hewlett-Packardmeommendm
u m m m m
that you perlodlca$ nquemt the Iatemt d l t l o n of thlm mupplement. ? coplam a n available from all UP o f f l ~ m .When nquemtlng coplem, quote
m
the manual Identlflcatlon Information from your mupplement, or the model number and prlnt dale from the title page of the manual.
DateIDiv: April 1990/33
Page: 1 of 1
PRINTED IN JAPAN
HEWLETT
\I PACKARO
MAINTENANCE MANUAL
MODEL 4195A
NETWORK/SPECTRUM
ANALYZER
(Including Option 00 1)
SERIAL NUMBERS
This manual applies directly to instruments whose serial number
prefix is as follows.
2904A with ROM-based firmware revision 2.00
2904J with ROM-based firmware revision 2.00
With changes described in APPENDIX A, this manual also applies to
instruments whose serial number prefix is 2830J and below, or whose
ROM-based firmware is revision 1.02 and below.
For additional important information about serial numbers, read SERI-
AL NUMBER in Section 7 of the Operation Manual.
@ COPYRIGHT: YOKOGAWA-HEWLETT-PACKARD, LTD., 1988
9-1. TAKAKURA-CHO, HACHIOJI-SHI, TOKYO. JAPAN
Manual Part Number: 04195-90100
Microfiche Part Number: 04195-90150 Printed: November 1989
March 1988 - First Edition Phis manual is the first edition Main-
tenance Manual for the HP 4195A Net-
worklspectrum Analyzer.
December 1988 Second Edition Specification changes as of December
1988.
November 1989 Third Edition Adjustment procedure changes.
H P 4195A Maintenance Manual
HOW TO USE THIS MANUAL
This Maintenance Manual for HP Model 4195A Network/Spectrum Analyzer includes the
information necessary to maintain the HP 4195A1sperformance. This manual contains three
sections and appendices, as follows.
Section 1 General Information
,
Section 1 includes the required equipment list, and information necessary for you to
know before you perform the performance tests, and adjustments. This section should
be read before performing tests and adjustments.
Section 2 Performance Tests
,
Section 2 is the performance test instruction necessary to confirm that the HP 4195A
satisfies the specifications given in Section 7 of the Operation Manual. This section
should be referred to for periodical performance checks, and for verification test after
repair.
Section 3, Adjustments
Section 3 is the adjustment instruction necessary to adjust the HP 4195A so that it
meets specifications. This section should be referred to when the 4195A fails the per-
formance tests,.or after repair.
Appendices
Appendix A is the Manual Backdating and provides information to use this manual with
a 4195A which was manufactured before the printing date of the manual. Appendix B
provides the board assembly list, and Appendix 6 provides the board assembly loca-
tions to locate the board assembly.
CERTIFICATION
Hewlett-Packard Company certifies that this product met its published specifications at
the time of shipment from the factory. Hewlett-Packard further certifies that its calibra-
tion measurements are traceable to the United States National Bureau of Standards, to
the extent allowed by the Bureau's calibration facility, and to the calibration facilities of
other International Standards Organization members.
WARRANTY
This Hewlett-Packard instrument product is warranted against defects in material and
workmanship for a period if one year from the date of shipment, except that in the case
of certain components listed in Section 7 of Operation Manual, the warranty shall be for
the specified period. During the warranty period, Hewlett-Packard Company will, at its
option, either repair or replace products which prove to be defective.
For warranty service or repair, this product must be returned to a service facility desig-
nated by HP. Buyer shall prepay shipping charges to HP and HP shall pay shipping
charges to return the product to Buyer. However, Buyer shall pay all shipping charges,
duties, and taxes for products returned to HP from another country.
HP warrants that its software and firmware designated by HP for use with an instru-
ment will execute its programming instruction when property installed on that instru-
ment. HP does not warrant that the operation of the instrument, or software, or firm-
ware will be uninterrupted or error free.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by Buyer, Buyer-supplied software or interfacing, unauthorized modifica-
tion or misuse, operation outside of the environment specifications for the product, or
improper site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICU-
LAR PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE
REMEDIES. HP SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL,
TRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
Product maintenance agreements and other customer assistance agreements are avail-
able for Hewlett-Packard products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Office.
Address are provided at the back of this manual.
H P 41954 Maintenance Maniral
SAFETY SUMMARY
The following general safety precautions must be observed during all phases of opera-
tion, service, and repair of this instrument. Failure to comply with these precautions or
with specific WARNINGS given elsewhere in this manual violates safety standards of
design, manufacture, and intended use of the instrument. The Hewlett-Packard Com-
pany assumes no liability for the customer's failure to comply with these requirements.
GROUND THE INSTRUMENT
To minimize shock hazards, the instrument chassis and cabinet must be connected to
an electrical ground. The instrument is equipped with a three-conductor AC power
cable. The power cable must be plugged into an approved three-contact electrical
outlet or used with a three-contact to two-contact adapter with the grounding wire
( green ) firmly connected to an electrical ground (safety ground) at the power outlet.
The power jack and the mating plug of the power cable meet International Electrotech-
nical Commission ( IEC ) safety standards.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gasses or fumes. Opera-
tion of any electrical instrument in such an environment constitutes a safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove instrument covers. Component replacement and
internal adjustments must be made by qualified maintenance personnel. Do not re-
place components with power cable connected. Under certain conditions, dangerous
voltages may exist even with the power cable removed. To avoid injuries, always dis-
connect power and discharge circuits before touching them.
DO NOT SERVICE O ADJUST ALONE
R
Do not attempt internal service or adjustment unless another person, capable of render-
ing first aid and resuscitation, is present.
USE CAUTION WHEN EXPOSING O HANDLING THE CRT
R
Breakage of the cathode-ray tube ( CRT) causes a high velocity scattering of glass
fragments ( implosion ). To prevent CRT implosion, avoid rough handling or jarring of
the instrument. Handling of the CRT shall be done only by qualified maintenance
personnel using approved safety mask and gloves.
DO NOT SUBSTITUTE PARTS O MODIFY INSTRUMENT
R
Because of the danger of introducing additional hazards, do not substitute parts or
perform unauthorized modifications to the instrument. Return the instrument to a
Hewlett-Packard Sales and Service Office for service and repair to ensure the safety
features are maintained.
DANGEROUS PROCEDURE WARNINGS
WARNINGS, such as the example below, precede potentially dangerous procedures
throughout this manual. Instructions contained in the warnings must be followed.
FzGiq
DANGEROUS VOLTAGES, CAPABLE OF CAUSING DEATH, ARE PRESENT IN
THlS INSTRUMENT. USE EXTREME CAUTION WHEN HANDLING, TESTING, AND
ADJUSTING THlS INSTRUMENT.
H P 4195A Maintenance Manlral
SAFETY SYMBOLS
General Definitions of Safety Symbols Used On Equipment or In Manuals.
Instruction manual symbol: the product will be marked with this
symbol when it is necessary for the user to refer to the instruction
manual in order to protect against damage to the instrument.
Indicates dangerous voltage ( terminals fed from the interior by
voltage exceeding 1000 volts must be so marked ).
Protective conductor terminal. For protection against electrical
shock in case of a fault. Used with wiring terminals to indicate
-
A OR @ the terminal which must be connected to ground before operating
equipment.
Low-noise or noiseless, clean ground ( earth ) terminal. Used for
a signal common, as well as providing protection against electri-
cal shock in case of fault. A terminal marked with this symbol
must be connected to ground in the manner described in the
installation (Operating ) manual, and before operating the
equipment.
Frame or chassis terminal. A connection to the frame ( chassis )
r)7 oa A of the equipment which normally includes all exposed metal
structures.
P.4 Alternating current ( power line ).
-
--- Direct current ( power line ).
-
m Alternating or direct current ( power line ).
A WARNING denotes a hazard. It calls'attention to a procedure,
practice, condition or the like, which, if not correctly performed or
adhered to, could result in injury or death to personnel.
A CAUTION sign denotes a hazard. It calls attention to a pro-
cedure, practice, condition or the like, which, if not correctly
performed or adhered to, could result damage to or destruction of
part or all of the product.
NOTE A NOTE denotes important information. It calls attention to a
procedure, practice, condition or the like, which is essential to
highlight.
TABLE OF CONTENTS
SECTION 1 GENERAL INFORMATION
1-1. INTRODUCTION
1-2. REQUIRED EQUIPMENT
1-3. PREPARATION FOR PERFORMANCE TESTIADJUSTMENT
13-1. SET THE LINE VOLTAGE SELECTION SWITCH
13-2. WARMINGI UP THE HP 4195A
13-3. EXPRESSION FOR THE KEYS AND SOFTKEYS IN THIS MANUAL
1-3-4. INITIALIZING THE 4195A
1-3-5. HOW TO SET UP THE 4195A
13-6. USER PROGRAM ( AUTO SEQUENCE PROGRAM )
1-3-7. HOW TO READ 4195A MEASUREMENT DATA
1-4. INTERCONNECTION CABLES
SECTION 2 PERFORMANCE TESTS
2-1. INTRODUCTION
2-2. PERFORMANCE TEST RECORD
CALCULATION SHEET
CALIBRATION CYCLE
INTERNALSYNTHESIZERFREQUENCYACCURACYTEST
RESOLUTION BAND WIDTH ACCURACY TEST
AMPLITUDE MEASUREMENT ACCURACY TEST
AMPLITUDE MEASUREMENT LINEARITY TEST
AMPLITUDE MEASUREMENT FREQUENCY RESPONSE TEST
SECOND HARMONIC DISTORTION TEST
THIRD ORDER INTERMODULATION DISTORTION TEST
RESIDUAL RESPONSE TEST
2-14. LEVEL ACCURACY/FLATNESS TEST
vii
Table of Conrrnrs
2-1 5. NON-SWEEP LINEARITY TEST
2-16. POWER SWEEP LINEARITY TEST
2-1 7. SECOND HARMONICS TEST
2-1 8. NON-HARMONIC SPURIOUS TEST
2-19. PHASE NOISE TEST
2-20. CROSSTALK TEST
2-21. MAGNITUDE RATIO/PHASE DYNAMIC ACCURACY TEST
2-22. MAGNITUDE RATIO/PHASE FREQUENCY RESPONSE TEST
2-23. DC SOURCE VOLTAGE ACCURACY TEST
CALCULATION SHEET
PERFORMANCE TEST RECORD
SECTION 3 ADJUSTMENTS
3-1. INTRODUCTION
3-2. SAFETY CONSIDERATIONS
3-3. ADJUSTABLE AND FACTORY SELECTED COMPONENTS
3-4. ADJUSTMENT INTERACTIONS
3-5. ADJUSTMENT LOCATIONS
3-6. PREPARATION FOR ADJUSTMENT
3-6-1. CONSTRUCTION OF ADJUSTMENT INSTRUCTION
3-6-2. SERVICE FUNCTION
3-6-3. EXTERNAL REFERENCE
3-7. SPECIAL DEVICE FOR ADJUSTMENT
3-8. SWITCHING POWER SUPPLY ADJUSTMENTS
3-8-1. SWITCHING FREQUENCY ADJUSTMENT
3-8-2. OUTPUT VOLTAGE ADJUSTMENT
3-9. HlGH STABILITY OSCILLATOR ADJUSTMENTS ( OPT. 001 ONLY )
3-9-1. SUPPLY VOLTAGE ADJUSTMENT
3-9-2. HIGH STABILITY OSCILLATOR FREQUENCY ADJUSTMENT
Table of Contenls
3-10. CRT DISPLAY ADJUSTMENTS
CRT DISPLAY SECTION REMOVAL
LOCAL VOLTAGE REGULATOR ADJUSTMENT
VERTICAL HOLD ADJUSTMENT
DISPLAY ADJUSTMENT
HORIZONTAL POSITION COARSE ADJUSTMENT
CRT CUTOFF ADJUSTMENT
WHITE BALANCE ADJUSTMENT
MAXIMUM INTENSITY ADJUSTMENT
FOCUS, CONVERQENCE, AND INTENSITY ADJUSTMENT
3-1 1. FREQUENCY GENERATOR ADJUSTMENTS
3-1 1-1. 80MHz REFERENCE SOURCE LEVEL ADJUSTMENT 3-32
3-1 1-2. 80MHz REFERENCE SOURCE FREQUENCY ADJUSTMENT 3-33
3-12. VCO OUTPUT SPURIOUS REJECTION ADJUSTMENTS 3-36
3-12-1. 100kHz SPURIOUS REJECTION ADJUSTMENT
3-12-2. API ADJUSTMENTS
3-12-3. 16OMHZ SPURIOUS REJECTION ADJUSTMENT
3-13. REFERENCE FREQUENCY CONVERTER ADJUSTMENTS 3-46
3-13-1. 80 MHz REFERENCE SIGNAL LEVEL ADJUSTMENT
3-13-2. 160 MHz BAND PASS FILTER AND REFERENCE SIGNAL LEVEL
ADJUSTMENTS
3-14. AC OVERLOAD DETECTOR ADJUSTMENTS
3-14-1. LF AC OVERLOAD DETECTOR ADJUSTMENTS
3-14-2. HF AC OVERLOAD DETECTOR ADJUSTMENTS
3-1 5. RECEIVER INPUT FILTER ADJUSTMENTS
3-15-1. -
150 MHz 225 MHz VOLTAGE TUNED BPF ADJUSTMENT
3-15-2. -
225 MHz 340 MHz VOLTAGE TUNED BPF ADJUSTMENT
3-15-3. -
340 MHz 500 MHz VOLTAGE TUNED BPF ADJUSTMENT
3-16. RECEIVER FIRST IF CONVERTER ADJUSTMENTS
3-16-1. FIRST IF CONVERTER 86.6 MHz BPF ADJUSTMENT
3-16-2. FIRST IF CONVERTER 246 MHz BPF ADJUSTMENT
3-16-3. FIRST IF CONVERTER 86.6 MHz LEVEL ADJUSTMENT
3-16-4. FIRST IF CONVERTER 246 MHz LEVEL ADJUSTMENT
3-16-5. FIRST IF CONVERTER LOCAL LEAK ADJUSTMENT
Table of Contents
3-17. RECEIVER SECOND IF CONVERTER ADJUSTMENTS 3-73
, .
3-1 7-1. SECOND IF CONVERTER 246 MHz BPF ADJUSTMENT
3-17-2. SECOND IF CONVERTER 86.6 MHz BPF ADJUSTMENT
3-17-3. SECOND IF CONVERTER LEVEL ADJUSTMENT
3-1 8. RECEIVER THlRD IF CONVERTER ADJUSTMENTS
3-18-1. THlRD IF CONVERTER 86-6 MHz BPF ADJUSTMENT
3-18-2. THIRD IF CONVERTER 6.316.9 MHz BPF ADJUSTMENTS
3-18-3. 20 dB AMPLIFIER GAlNlPHASE ADJUSTMENT
3-18-4. THlRD IF CONVERTER 6.6 MHz LEVEL ADJUSTMENT
3-18-5. 10 d B AMPLIFIER GAlN ADJUSTMENT
3-19. SOURCE SECOND/THIRD IF CONVERTER ADJUSTMENTS
3-19-1. SECOND IF CONVERTER FlRST 86.6 MHZ BPF ADJUSTMENT
3-19-2. SECOND IF CONVERTER SECOND 86.6 MHZ BPF ADJUSTMENT
3-19-3. THlRD IF CONVERTER 346 MHZ BPF ADJUSTMENT
3-19-4. THlRD IF CONVERTER 86.6 MHZ BPF ADJUSTMENT
3-1 9-5. SECONDITHIRD IF CONVERTER GAlN ADJUSTMENT
3-20. SOURCE FlRST IF CONVERTER ADJUSTMENTS
3-20-1. FlRST IF CONVERTER BAND PASS FILTER ADJUSTMENT
3-20-2. FlRST IF CONVERTER GAlN ADJUSTMENT
3-21. .SOURCE OUTPUT FILTER ADJUSTMENTS
3-21-1. -
150 MHz 225 MHz VOLTAGE TUNED BPF ADJUSTMENT
3-21-2. -
225 MHz 340 MHz VOLTAGE TUNED BPF ADJUSTMENT
2-21-3. -
340 MHz 500 MHz VOLTAGE TUNED BPF ADJUSTMENT
3-22. SOURCE POWER AMPLIFIER ADJUSTMENTS
3-22-1. POWER AMPLIFIER DC OFFSET ADJUSTMENTS
3-22-2. POWER AMPLIFIER GAlN ADJUSTMENTS
3-23. SOURCE DC BIAS VOLTAGE ADJUSTMENTS
3-24. PHASE DETECTOR TRACKING ADJUSTMENTS
3-25. CALIBRATION DATA UPDATING
HP-IB CONTROLLER PREPARATION
RECEIVER BPF TUNING VOLTAGE CALIBRATION DATA UPDATING
FlRST IF CONVERTER OUTPUT LEVEL FINE ADJUSTMENT
RECEIVER FREQUENCY RESPONSE CALIBRATION DATA UPDATING
SOURCE BPF TUNING VOLTAGE CALIBRATION DATA UPDATING
SIGNAL SOURCE GAlN ADJUSTMENT
SIGNAL SOURCE AMPLITUDE CALIBRATION DATA UPDATING
SIGNAL SOURCE LINEARITY CALIBRATION DATA UPDATING
SIGNAL SOURCE FLATNESS CALIBRATION DATA UPDATING
EXITING THE ADJUSTMENT PROGRAM
Table of Contents
APPECDIX A MANUAL BACKDATING
APPENDIX B BOARD ASSEMBLY LIST
APPENDIX C BOARD ASSEMBLY LOCATIONS
GENERAL INFORMATION
SECTION 1
GENERAL INFORMATION
1-1. INTRODUCTION
This manual provides the information to maintain the HP 4195A; the Performance Test, and
Adjustment procedures. The performance test should be performed during the periodical
perf6rmance check, or when confirming the HP 4195A meets specified performance require-
ments after being repaired or adjusted. The HP 4195A adjustments should be performed
when the HP 4195A fails the performance test, or after being repaired. This section provides
a list of the equipment required to do the performance test and adjustment, and the informa-
tion you must know before performing any tests and adjustments.
1-2. REQUIRED EQUIPMENT
Table 1-1 lists the equipment required to do the performance tests and adjustments. Use
only calibrated test instruments when performance testing the HP 4195A. If the recommen-
ded test equipment is not available, equipment with specifications that equal or surpass
those of the recommended equipment may be used.
NOTE
Components used as standards must be (1) calibrated using an instrument whose
specifications are traceable to the National Bureau of Standards (NBS) or to an
equivalent standards group, or (2) calibrated directly by an authorized calibration
organization such as NBS. The calibration cycle depends on the stability specifi-
cations of each component.
G E I V G R AI, I/VFORA/lAT I O X
Table 1-1. Required Equipment (sheet 1 of 3)
Equipment Critical Specifications Recommended
~ t y use1
Model
Series 200 No Substitute HP 9826 or HP 9836 1 A
Controller
Spectrum Frequency Range: 1M to 1GHz HP 85688 1 P A
Analyzer Amplitude Accuracy: 1 + 1dB
Power No Substitute HP 436A Opt. 022 1 P A
Meter or HP 438A
Power Freq. Range: 100k to 500MHz HP 8482A 1 P A
Sensor Power Range: 1u to 10mW
Impedance: 50Q
Digital DCV and ACV measurement HP 3456A 1 P A
Voltmeter Freq. Range: > 100kHz
ACV dBm reading
Signal No Substitute HP 86568, HP 8482A 2 P
Generator or HP 84828 1 A
Frequency Maximum Frequency: > 500MHz HP 5385A Opt. 004 1 P A
Counter Accuracy: < 0.25 ppm
Network Freq. Range: 10M to 500MHz HP 8753A 1 A
Analyzer Dynamic Accuracy: 10.05dB
Scale Resolution: 0.1 dB/Div.
Oscillo- Vertical: 1OmV/Div. HP 54111D 1 A
scope Horizontal: 5ms/Div.
Power Freq. Range: >500MHz HP 11667A 1 P
Splitter Two outputs 2 A
Coaxial Atten.: 0 to 80dB, 10dB step HP 8496A or HP 8496G 1 P A
Step VSWR: < 1.02 w/Opt. 001 & Opt. H60
Attenuator Calibration Uncertainty:
< k0.006 dB (10 to 40dB)
< k0.015 dB (50 to 80dB)
(Calibrated at 50 MHz)
Coaxial Termination, 50Q, N(m) HP 909C Opt. 012 1 P A
Loads
Feedthrough, 50Q PN 04192-61002 1 P
BNC(m)-BNC(f) or HP 11048C
Filter Lowpass, Cutoff Freq.: 50MHz PN 0955-0306 1 P
BNC(m)-BNC(f)
-- -
Table 1-1. Required Equipment (sheet 2 of 3)
1
Equipment Critical Specifications Recommended Use
Qty
Model
Signal (Used to sum two RF signal) PN 41 952-65001 1 P
Combiner (included in HP 41952A)
Double Freq. Range: 500MHz HP 10514A 1 A
Balanced
Mixer
Attenuator Impedance 50 R, N(m)-N(f)
Pad Att 3dB HP 8491A Opt. 003 3 A
Att 6dB HP 8491A Opt. 006 1 P
Att 1OdB HP 8491A Opt. 010 1 P
Att 6dB, VSWR < 1.015 HP 8491A 1 P
w/Opt. 006 & Opt. H60
Att 10dB, VSWR < 1.01 5 HP 8491A 1 P
w/Opt. 010 & Opt. H60
Probes 10:1, 1MR, Max. Input: >200V HP 10040A 1 A
Impedance: > 500 R at 250MHz HP 10020A 1 A
Cables HP-IB HP 10833A/B/C 3 A
Coaxial, 50R
N(m)-N(m), 61cm HP 115008 3 P A
BNC(m)-BNC(m), 30cm PN 8120-1838 2 A
BNC(m)-BNC(m), 61c m PN 8120-1839 1 P
3 A
BNC(m)-BNC(m), 122cm PN 8120-1840 2 P A
or HP 10503A
Test Alligator Clips to HP 11002A 1 A
Leads Dual Banana Plug
Adapters Coaxial, 50R
N(f)-N(f) PN 1250-0777 1 P
N(f)-BNC(f) PN 1250-1474 1 P A
N(m)-N(m) PN 1250-0778 1 P
2 A
N(m)-BNC(f) PN 1250-0780 1 P
3 A
N(f)-B NC(m) PN 1250-0077 1 P
3 A
BNC(m)-BNC(f), Right Angle PN 1250-0076 1 A
BNC(f)-SMB(f) PN 1250-1236 4 A
BNC(f)-SMC(f) PN 1250-0832 1 A
SMB(m)-SMB(m) PN 1250-0669 1 A
BNC(f)-Dual Banana Plug PN 1251-2277 1 P A
Table 1-1. Required Equipment (sheet 3 of 3)
I
Equipment Critical Specifications Recommended Use
Qty
Model
Service HP 4195A Adjustment Program PN 04195-65009 1 A
Tool Extender Board PN 04195-66590 1 A
Template, CRT Alignment PN 04195-69051 1 A
Interconnection Cable, Spin PN 16349-61601 1 A
Interconnection Cable, 50pin PN 16349-61602 1 A
Interconnection Cable, BNC(m) PN 16349-61603 3 A
CRT Section Extension Cable PN 16349-61604 1 A
Resistor 46412, BNC(f)-BNC(f) Refer to para. 3-7 1 A
Note: ' P and A indicate Performance Test and Adjustment, respectively.
An HP 8496A/G step attenuator with required low VSWR (c 1.02) can be
purchased by specifying option H60, then contact your nearest Hewlett-
Packard service center for the required calibration frequency and calibration
uncertainty.
If your attenuator is an HP 84966 (remote control), also provide the seg-
ment actuation sequence for every attenuation as listed below.
Attenuation Activated Segment
4
1 and 4
2 and 4
1,2, and 4
' An HP 8491A option 006 or option 010 fixed attenuator with required low
VSWR (c 1.015) can be purchased by specifying option H60.
1-3. PREPARATION FOR PERFORMANCE TESTIADJUSTMENT
This paragraph provides the information which you must know, and the steps you must
perform, before starting the Performance TestIAdjustment.
1-3-1. SET THE LINE VOLTAGE SELECTION SWITCH
The Line Voltage Selection Switch on the HP 4195A's rear panel must be set to the line
voltage in your area, BEFORE turning the HP 4195A ON.
1-3-2. WARMING UP THE HP 4195A
The HP 4195A must be warmed up for at least 30 minutes, before starting the Performance
Test and Adjustment.
1-3-3. EXPRESSION FOR THE KEYS AND SOFTKEYS IN THIS MANUAL
In the remainder of this manual, softkeys are indicated in boldface type and enclosed in
single quotes (e.g., 'NETWORK' softkey), and keys are indicated in boldface type only (e.g.,
PRESET key).
1-3-4. INITIALIZING THE HP 41 95A
The performance test and adjustment procedures begin with the HP 4195A in its initialized
state. So, after setting the HP 419514's measurement configuration (NETWORK, SPEC-
TRUM, IMPEDANCE, S11, S12, S21, or S22), initialize the HP 4195A by pressing the PRE-
SET key (or enter the "RST" command from the Keyboard Input Line on the HP 4195A's
display).
NOTE
Be sure to first select the CONFIGuration, then press the PRESET key. The initial-
ization parameters depend on the measurement configuration selected.
1-3-5. HOW TO SET UP THE HP 4195A
The HP 4195A is set up by pressing the HP 4195A's front panel keys and softkeys. The HP
4195A can also be set up by entering the HP 4195A's Device Dependent Commands which
are displayed on the Keyboard lnput Line by pressing the alphabetical keys when the BLUE
shift key is ON.
In the performance testladjustment procedures, the COMMANDS (HP 4195A Device Depend-
ent Commands) to set the test condition are listed. If you are familiar with the HP 4195A
front panel operation, use the front panel keys to set up the HP 4195A. Otherwise, enter the
COMMANDSfrom the Keyboard lnput Line using the BLUEIGREEN shifted alphabetical keys.
How To Enter The COMMAND From The Keyboard lnput Line:
1. Press the front panel BLUE shift key, and confirm that the BLUE shift key indica-
tor is ON.
2. If the character for a command is written in green on the front panel, press the
GREEN shift key for every green character to be entered.
3. Press the alphabetical keys or the number keys as required.
4. Repeat steps 2 and 3, until the complete command is displayed on the Keyboard
lnput Line.
5. Press the ENTERIEXECUTE key, to enter the command.
NOTE
When the ENTERIEXECUTE key is pressed, the BLUE shift key indicator will go
OFF.
\
Keyboard Input Line
Figure 1-1. Keyboard lnput Line Location
1-3-6. USER PROGRAM (AUTO SEQUENCE PROGRAM)
The HP 4195A User Program capability is used to perform some parts of the performance
test. This capability can also be used to set up the HP 4195A's test/adjustment condition.
The user program can be entered whiie in the User Program editor by pressing the keys and
softkeys that you wouid press during front panel operation or by entering the COMMANDS
using the alphabetical keys. The procedure to edit a User Program is shown below.
How to edit a User Program:
1. Press the PROGRAM key on the HP 4195A front panel.
2. Press the 'EDIT' softkey and the ENTERIEXECUTE key to enter the User Program
editor.
3. Press the front panel keys and softkeys, or press the alphabetical keys, to display the
commands on the program line. To use multi-statement, use a semicolon ( ; ) as the
delimiter to separate commands.
4. Press the ENTERIEXECUTE key to enter the command.
5. Repeat steps 3 and 4, until all commands are entered.
6. Press the PROGRAM key and 'QUIT editor' softkey to exit from the User Program
editor.
When you create an User Program for the periodic test and adjustment, it will be helpful to
save the User Program on a flexible disc using the HP 4195A's internal disc drive. Refer to
HP 4195A Operation Manual for details of the User Program capability, and for the HP
4195A Device Dependent Commands.
1-3-7. HOW TO READ HP 4195A MEASUREMENT DATA
Some performance testladjustment procedures use the measured data by the HP 4195A.
The HP 4195A displays the measurement data in graphical form as a trace. The HP 4195A
displays two traces, the yellow trace is data A, and the blue trace is data B. The measure-
ment data can be read by using a marker to display the measurement data, pointed to by
the marker, in the Marker Area, as shown in Figure 1-2.
Marker Area
DIV DIV CENKR 400 000 .OW te
10.00 10.00 BM 2 OQO ~ . o o o
P te
RBW: i K H z B t : 7 . n a . c R U S B U R J O . T - ~
Figure 1-2. Marker ,Area
1-7
1-4. INTERCONNECTION CABLES
The HP 4195A consists of a Control Unit (unit on the top), and a Measurement Unit (unit on
the bottom). These units are interconnected as shown in Figure 1-3.
Some of the adjustments require the longer lnterconnection Cables. In these adjustments,
use the longer lnterconnection service Cables, as shown in Figure 1-3, instead of the stan-
dard short lnterconnection Cables. Unless instructed to use the longer cables, use the
furnished standard short lnterconnection Cables.
Figure 1-3. lnterconnect~onCables
PERFORMANCE TESTS
SECTION 2
PERFORMANCE TESTS
2-1. INTRODUCTION
This section provides the test procedures used to verify that the HP 4195A's specifications
listed in the HP 4195A Operation Manual are met. All tests can be performed without access
to the interior of the instrument. The Performance Tests can also be used to perform in-
coming inspection, and to verify that the HP 4195A meets performance specifications after
troubleshooting or adjustment. If the performance tests indicate that the HP 4195A is not
operating within the specified limits, check your test setup, and then proceed to Adjustments
or Troubleshooting, if necessary.
NOTE
Perform all performance tests in an ambient temperature of 23 O Ck5 O C.
2-2. PERFORMANCE TEST RECORD
Record the performance test results in the Test Record at the end of this section (Photocopy
the Test Record and use the photocopy). The Test record lists all test specifications and
their acceptable limits. Test results recorded during incoming inspection can be used for
comparison purposes during periodic maintenance, troubleshooting, and after repair or
adjustment.
NOTE
The test limits indicated for each test do not take into account the measurement
error of the test equipment used. Be sure to take the test equipment's measure-
ment error into account when determining whether or not the HP 4195A meets
specifications.
2-3. CALCULATION SHEET
The Calculation Sheet is used to as an aid for recording raw measurement data, and cal-
culating the performance test results.
The performance test procedure gives the test sequence for performing a test, the complete
set of measurement data are recorded on the calculation sheet, the results are calculated
using the equations given on the calculation sheet, and the results are transcribed to the
Performance Test Record.
The Calculation Sheet list the test points, and the test settings.
How to Use the Calculation Sheet:
1. Photo copy the Calculation Sheet.
2. Follow the performance test procedure and record the measurement value, the
HP 4195A's reading, etc., into the specified column on the Calculation Sheet.
3. Calculate the test result using the appropriate equation given on the Calculation
Sheet.
4. Record the test result into the TEST RESULT column on the Calculation Sheet or
the Performance Test Record sheet as appropriate.
2-4. CALIBRATION CYCLE
The HP 4195A requires periodic performance verification. The frequency of performance
verification depends on the operating and environmental conditions under which the HP
4195A is used. Verify the HP 4195A's performance, using the performance tests described
in this section, at least once a year. To minimize instrument down-time and to ensure opti-
mum operation, perform preventive maintenance and calibration at least twice a year.
PERFORMANCE TESTS
2-6. INTERNAL SYNTHESIZER FREQUENCY ACCURACY TEST
This test uses an external frquency counter to test the HP4195A's Internal Synthesizer Fre-
quency Accuracy.
SPECIFICATION:
Frequency Accuracy +20 ppm (23 +5 C)
+ ppm (23 -15' C; with Option 001)
I
EQUIPMENT:
Frequency Counter
BNC(m)-BNC(m) Cable, 61 cm
N(m)-BNC(f) Adapter
PROCEDURE:
1. Set up the HP 4195A as follows.
COMMAND
CONFIGURATION NETWORK FNCl
INITIALIZE PRESET RST
SPAN 0 HZ SPAN= 0
2. Connect the BNC(m)-BNC(m) Cable from HP 4195A OUTPUT S1, to the Frequency
Counter INPUT B, as shown in Figure 2-1.
If the HP 4195A is equipped with Option 001, confirm that a BNC(m)-BNC(m) cable
is connected between the Control Unit's EXT REFERENCE connector and the Mea-
surement Unit's REFERENCE OVEN connector. If Option 001 is NOT installed,
connect nothing to the EXT REFERENCE connector.
HP 5385A
PUT B
Figure 2-1. Internal Synthesizer Frequency Accuracy Test Setup
2-3
PERFORMANCE TESTS
3. Set the HP 4195A CENTER FREQUENCY in according to the table below. Record
the frequency counter reading on the Performance Test Record.
NOTE
The 100 MHz CENTER FREQUENCY can be set by pressing the CENTER, 1, 0, 0,
MHz/!/ keys.
PERFORMANCE TESTS
-
2-7. RESOLUTION BAND WIDTH ACCURACY TEST
This test measures the HP 4195A's Resolution Bandwidth (RES BW). the internal reference
signal (10 MHz) is used as a signal source.
SPECIFICATION:
Resolution Bandwidth Accuracy +- 1O0/0
EQUIPMENT:
BNC(m)-BNC(m) Cable, 122 cm
N(m)-BNC(f) Adapter
PROCEDURE:
1. Set up the HP 4195A as follows.
COMMAND
CONFIGURATION SPECTRUM FNC2
INITIALIZE PRESET RST
CENTER 10 MHz CENTER= 10 M
VIDEO FILTER on VFTR1
INPUT ATTENUATOR (Rl) 40 dB ATR1= 40
SWEEP TRIGGER MODE SINGLE SWM2
NOTE
The INPUT ATTENUATOR can be set by pressing REF ATTEN and the up/down
keys.
2. Connect the BNC(m)-BNC(m) Cable to the HP 4195A INPUT R1 from its rear panel
10 MHz OUTPUT, as shown in Figure 2-2.
OUTPUT
N(m)-BNC(I)
Adapter
Figure 2-2. RES BW Accuracy Test Set up
PERFORMANCE TESTS
3. Enter the following test program to use the HP 4195A User Program (ASP) capability.
The keystrokes are shown in the note below.
10 *
SPAN= 1.7 RBW Set span
20 SWTRG Make a single sweep measurement
30 AUTO Perform auto scaling
40 MCF4 Use o marker and Line Cursor
50 MKMX Move o marker to the max point
60 DLCURS= 9 Move line cursor to -3 dB point
90 WIDTH1 Read -3 dB bandwidth (RES BW)
80 END
NOTE
Test program can be entered using the following keystrokes. (The ENTER/
EXECUTE key is abbreviated as ENTER.)
Begin editing by pressing PROGRAM, 'SCRATCH', ENTER, 'EDITq, ENTER.
LINE KEYSTROKES
.,
10 SPAN, 1, 9, MATH OPERATOR, '' RES BW, left arrow, DEL CHAR,
,,
ENTER
20 TRIGIRESET, ENTER
30 SCALE REF, 'rectan X-A&B9, 'AUTO SCALE', ENTER
40 MODE, 'oMKR & LCURS', ENTER
50 MKR+, 'o MKR menu', 'MKR+MAXY, ENTER
60 MKR+, '0-LCURS menuy,'m0rel/2~,"VALUE entry', -, 3, ENTER
70 6WIDTHon off', 1, ENTER
80 PROGRAM, 'END', ENTER
Press 'QUIT editor' to end editing.
4. Set the HP 4195A RES BW in according to the table below. Run the test program
(press PROGRAM, WJN'), and wait until sweep ends.
5. Record the displayed WIDTH value on the Performance Test Record. Repeat step 4.
RES BW
100 Hz
300 Hz
1 kHz
3 kHz
10 kHz
30 kHz
100 kHz
300 kHz
i
PERFORMANCE TESTS
2-8. AMPLITUDE MEASUREMENT ACCURACY TEST
This tests the HP 4195A's receiver Amplitude Measurement Accuracy. This test consists of
comparing the absolute power level of each input with a power meter or a digital voltmeter.
SPECIFICATION:
Amplitude Measurement Accuracy k1.0 dB. (at 50 MHz, at the upper limit
level of Input Range)
EQUIPMENT:
Power Meter
Power Sensor
Step Attenuator
Signal Generator
N(m)-N(m) Cable, 61 cm 2 ea.
N(f)-N(f) Adapter
BNC(m)-BNC(m) Cable, 122 cm
PROCEDURE:
1. Record the Step Attenuator 50 MHz calibration value in the Calculation Sheet column
[ a 1.
2. Calibrate the Power Meter for the Power Sensor.
3. Configure the test setup shown in Figure 2-3. The N(m)-N(m) cable must be con-
nected between the Step Attenuator and the Power Sensor with the N(f)-N(f) Adapter.
N(m)-N(m) Cable
HP 8482A
HP 436A
N(f)-N(fl Adapter
HP 8496A
Figure 2-3.Amplitude Measurement Accuracy Test Setup
PERFORMANCE TESTS
4. Set the Signal Generator AMPLITUDE and FREQUENCY, and the Step Attenuator as
follows.
Signal Generator Output Amplitude 10 dBm
Signal Generator Output Frequency 50 MHz
Step Attenuator 0 dB
5. Record the Power Meter reading in the Calculation Sheet column [ b 1.
NOTE
The power meter reading should be +I0 dBm +2 dB.
6. Set up the HP 4195A as follows.
COMMAND
CONFIGURATION SPECTRUM FNC2
INITIALIZE PRESET RST
SWEEP TRIGGER MODE MANUAL SWM3
CENTER 50 MHz CENTER= 50 M
SPAN 0 Hz SPAN= 0
RES BW 10 Hz RBW= 10
VIDEO FILTER on VnR1
7 . Disconnect the N(m)-N(m) cable from the Power Sensor, and connect it to HP 4195A
INPUT R1 as shown in Figure 2-4. Connect the BNC(m)-BNC(m) Cable between the
Signal Generator's TIME BASE OUTPUT connector and the HP 4195A's EXT REFER-
ENCE connector.
BNCh)-BNCh) Cable
To TIME BASE To EXT REFERENCE
OUTPUT
0 1 0
0
u u 3
HP 8656A
HP 8496A
Figure 2-4. Amplitude Measurement Accuracy Test Setup
PERFORMANCE TESTS
8. Set the Step Attenuator, the HP 4195A IF RANGE, and the INPUT ATTENUATOR as
follows, and then record the HP 4195A data A value (MAG) into Calculation Sheet
column [ c 1.
Step HP 41 95A HP 4195A
Attenuator INPUT ATTENUATOR IF RANGE
20 d B 10 dB NORMAL
30 d B 10 dB LOW DISTORTION
NOTE
The IF RANGE can be selected by selecting and pressing a softkey that appears
after REF ATTEN is pressed.
9. Set the HP 4195A IF RANGE to the HIGH SENSlTlVlTY mode.
10. Set the Step Attenuator and the HP 4195A INPUT ATTENUATOR as follows, and
record the HP 4195A data A value (MAG) into Calculation Sheet column [ c 1.
Step Attenuator HP 4195A INPUT ATTENUATOR
50 dB 0 dB
40 dB 10 dB
30 dB 20 dB
20 dB 30 dB
10 dB 40 dB
0 dB 50 dB
11. Change the ~ttenuatorConnection and the HP 4195A INPUT PORT in according to
the table below, and repeat step 10.
7
Attenuator Connection HP 4195A INPUT PORT
TI T I ("PORTS")
R? R2 ("PORT3")
T2 T2 ("PORT4")
NOTE
To set the INPUT ATTENUATOR for INPUT PORTS TI, R2, and T2, press the
proper REF ATTEN or TEST ATTEN key then press the up/down arrow keys until
the desired attenuation is displayed.
12. Use the equation given on the Calculation Sheet to calculate the test results (abso-
lute accuracy), and transcribe the test results to the Performance Test Record.
PERFORMANCE TESTS
2-9. AMPLlTUDE MEASUREMENT LlNEARlTY TEST ,
This tests the HP 4195A1s receiver Amplitude Measurement Linearity. The linearity is deter-
mined by measuring several input signal levels. The internal signal source and a step at-
tenuator are used to apply these test signals.
SPECIFICATION:
e Linearity (at
I Where IF Range: Low Distortion mode CdB)
Each Input l e v e l
(-30 t o +20 dBm, lOdB step) Resolution Band Width: 10 Hz
EQUIPMENT:
Step Attenuator HP 8496A/G Opt.OO1
N(m)-N(m) Cable, 61 cm HP 115008 2 ea.
PROCEDURE:
1. Record the Step Attenuator 50 MHz calibration value into the Calculation Sheet
column [ b 1.
PERFORMANCE TESTS
2. Set up the HP 41 95A as follows.
COMMAND
CONFIGURATION SPECTRUM FNC2
INITIALIZE PRESET RST
SWEEP TRIGGER MODE MANUAL SWM3 .
CENTER 49.999 MHz CENTER= 49.999 M
SPAN 0 Hz SPAN= 0
RES BW 10 Hz RBW= 10
PORT SELECT SOURCE CHI PWR1
SOURCE AMPLITUDE (S1) -30 dBm OSC1= -30
INPUT ATTENUATOR (R1) 0 dB ATR1= 0
IF RANGE LOW DISTORTION IRNG2
NOTE
SOURCE S1 can be set by pressing CONFIG, 'PORT SELECT', and 'SOURCE
CHI'.
3. Connect the Step Attenuator to the HP 4195A as shown in Figure 2-5, and set the
Step Attenuator to 0 dB.
Figure 2-5. Amplitude Measurement Linearity Test Setup
4. Vary the HP 4195A SOURCE AMPLITUDE (S1) with upldown arrow keys, so that HP
4195A data A (MAG) value is as close as possible to -30 dBm, and then record the
data A (MAG) value into the Calculation Sheet column [ c 1.
5. Increment the Step Attenuator setting from 10 dB to 80 dB in IOTB
steps, and re-
cord the HP 4195A data A (MAG) value at each step into the calculation Sheet
column [ c 1.
6. Use the equation given on the Calculation Sheet to calculate the test results, and
transcribe the test results to the Performance Test Record.
PERFORMANCE TESTS
2-10. AMPLITUDE MEASUREMENT FREQUENCY RESPONSE TEST
This tests the HP 4195A's receiver Amplitude Measurement Frequency Response. This test
consists of comparing the absolute power level of each input with a digital voltmeter or a
power meter reading at several frequencies. The signal is applied from the internal signal
source.
SPECIFICATION:
Amplitude Measurement Frequency Response
51.5 dB (when attenuator = 10 dB)
EQUIPMENT:
Digital Voltmeter
Power Meter
Power Sensor
Power Splitter
50 fl Feedthrough
N(m)-N(m) Cable, 61c m
BNC(m)-BNC(m) Cable, 61cm
N(m)-N(m) Adapter
N(m)-BNC(f) Adapter
BNC(f)-Dual Banana Plug Adapter
PROCEDURE:
1. Set up the HP 4195A as follows.
COMMAND
CONFIGURATION SPECTRUM FNC2
INITIALIZE PRESET RST
SWEEP TRIGGER MODE MANUAL 5wm3
SPAN 0 Hz SPAN= 0
RES BW 10 Hz RBW= 10
PORT SELECT SOURCE CHI PWR1
SOURCE AMPLITUDE (S1) -14 dBm OSC1= -1 4
INPUT ATTENUATOR (ALL) 10 dB ATR1= 10
ATTI= 10
ATR2= 10
ATT2= 10
IF RANGE LOW DISTORTION 1rng2
VIDEO FILTER on VFTR 1
PERFORMANCE TESTS
2. Configure the test equipment as shown in Figure 2-6. Use the N(m)-N(m) Adapter to
connect the Power Splitter to HP 4195A INPUT R1. Connect the 50 f2 feedthrough at
the Digital Voltmeter INPUT. Connect the Voltmeter input cable to the Power Splitter.
N (m) -N (m) A d a p t e r DUAL-BANANA t o
BNC (f) A d a p t e r
HP 1 1 6 6 7 A HP 3 4 5 6 A
..-
I
I BNC (m) -BNC (m) C a b l e
HP 8 4 8 2 A
Figure 2-6. Amplitude Measurement Frequency Response Test Setup
3. Set the the Digital Voltmeter to read AC Volts and press the MATH, 4, 5, 0, STORE,
and 4 keys, in sequence, to convert and display the voltage readings in dBm units.
4. Set the HP 4195A CENTER FREQUENCY to 10 Hz, and record the HP 4195A data A
(MAG) value and the reading of the Digital Voltmeter into the Calculation Sheet
columns [ a ] and [ b 1, respectively.
5. Set the HP 4195A CENTER FREQUENCY to 100 kHz, and record the reading of the
Digital Voltmeter in Calculation Sheet column [ c 1.
6. Connect the Power Sensor to the Power Meter, and calibrate the Power Meter to the
Power Sensor.
7. Disconnect the Digital Voltmeter input cable from the Power Splitter, and connect the
Power Sensor to the Power Splitter.
PERFORMANCE TESTS
8. Set the HP 4195A CENTER FREQUENCY to the following values, and record HP
4195A data A (MAG) value, and the Power Meter reading into the Calculation Sheet
columns [ a ] and [ b 1, respectively. I
NOTE
Before recording the value, confirm that both the HP 4195A's data A and
the Power Meter reading are within -20 dBm 24 dB.
CENTERFREQUENCY
100 kHz 224.99 MHz (R1 only)
50 MHz
9.99 MHz (R1 only) 339.99 MHz (R1 only)
10 MHz
149.99 MHz (R1 only)
150 MHz
9. Disconnect the Power Splitter with the N(m)-N(m) Adapter from the HP 4195A INPUT.
10. Disconnect the Power Sensor from the Power Splitter, and connect the Digital Volt-
meter input cable to the Power Splitter.
11. Set the HP 4195A INPUT PORTS as follows, and connect the Power Splitter using the
N(m)-N(m) Adapter to HP 4195A INPUTS TI, R2, and T2, and repeat steps 3 through
16 for each setting.
NOTE
When performing step 8, skip CENTER FREQUENCY(s) labeled "R1 only".
12. Use the equation given on the Calculation Sheet to calculate the test results, and
transcribe the test results to the Performance Test Record.
PERFORMANCE TESTS
2-11. SECOND HARMONIC DISTORTION TEST
This test measures the HP 4195A receiver's Second Harmonic Distortion. This test measures
the second harmonic (double frequency) level of input signal. A low-pass filter is inserted
between the external signal generator and the input in order to eliminate the Signal Genera-
tor's own second harmonic from adding error directly.
SPECIFICATION:
Second Harmonic Distortion 5 -70 dBc referenced to the sinusoidal signals
(2 2 MHz) which is equal to every Input Ran-
ges (IF Range: Low Distortion mode)
EQUIPMENT:
Signal Generator
50 MHz Low Pass Filter
N(m)-N(m) Cable, 61 cm 2 ea.
BNC(m)-BNC(m) Cable, 122 cm
N(f)-BNC(m) Adapter
N(f)-BNC(f) Adapter
PROCEDURE:
1. Set up the HP 4195A as follows.
COMMAND
CONFIGURATION SPECTRUM FNC2
INITIALIZE PRESET RST
SWEEP TRIGGER MODE SINGLE SWM2
CENTER 50 MHz CENTER= 50 M
SPAN 50 kHz SPAN= 50 K
RES BW 1 kHz RBW= 1 K
INPUT ATENUATOR (R1) 30 dB ATR1= 30
IF RANGE LOW DISTORTION lRNG2
PERFORMANCE TESTS
2. Set up the test configuration shown in Figure 2-7. Connect the BNC(m)-BNC(m)
cable between the Signal Generator's TIME BASE OUTPUT connector and the
HP 4195A's EXT REFERENCE connector.
BNC(m) -BNC(ml Cable T o EXT REFERENCE
~(f)-BNC(m) Adapter
Figure 2-7. Second Harmonic Distortion Test Setup
3. Set the Signal Generator FREQUENCY to 50 MHz, and AMPLITUDE to 0 dBm.
4. Press the TRIGIRESET key, and wait until the single sweep measurement is
completed.
5. Press the MKR*, 'MKR+MAX' keys to move the o marker to the peak point. Record
-the HP 4195A data A (MAG) value into the Calculation Sheet column [ a 1, (this is the
reference value).
6. Change the HP 4195A CENTER FREQUENCY to 100 MHz, and press the TRIG/
RESET key.
7. Move the o marker to the peak point, and record the HP 4195A .data A (MAG) value
into the Calculation Sheet column [ b 1.
8. Use the equation given on the Calculation Sheet to calculate the test result, and
transcribe the test results to the Performance Test Record.
PERFORMANCE TESTS
2-12. THIRD ORDER INTERMODULATION DISTORTION TEST
This test measures the HP 4195A's receiver Third Order Intermodulation Distortion. A direc-
tional bridge is used to combine the two signals applied by two signal generators, and the
frequency of these signals is separated by 0.5 MHz form each other. This performance is
determined by measuring the amplitude of intermodulation frequency.
SPECIFICATION:
Third Order lntermodulation Distortion
I -80 dBc referenced to two sinusoidal signals
(2 2 MHz; 500 kHz separation) which are lower
6 dB then every Input Ranges. (IF Range: Low
Distortion mode)
EQUIPMENT:
Signal Generator HP 86568 2 ea.
BNC(m)-BNC(m) Cable, 122 cm PN 8120-1840 2 ea.
N(m)-N(m) Cable, 61 cm HP 115008 3 ea.
Signal Combiner PN 41952-65001
(included in HP 41952A)
50 R Termination HP 909C Opt. 012
N(f)-N(f) Adapter HP PN 1250-0777 2 ea.
PROCEDURE
1. Set up the HP 4195A as follows.
COMMAND
CONFIGURATION SPECTRUM
INITIALIZE PRESET
SWEEP TRIGGER MODE MANUAL
SPAN 0 Hz
RES BW 10 Hz
INPUT ATTENUATOR 0 dB
IF RANGE LOW DISTORTION
PERFORMANCE TESTS
2. Set up the test configuration as shown in Figure 2-8. Connect the BNC(m)-BNC(m)
cable between the Signal Generator's TlME BASE OUTPUT connector and the
HP 41 95A's EXT REFERENCE connector.
To TlME BASE OUTPUT BNChkBNChd Cable
-
To TIME BASE INPUT To EXT REFERENCE
Signsl Generator 1
HP 86568
V I
Signal Generator 2
I Ld7TA1
N(fW(O Adapter
Termination I I
RF INPUT
N h k W Cable
Figure 2-8. Third Order Intermodulation Distortion Test Setup
3. Set the OUTPUT AMPLITUDE of Signal Generators 4 and 2, to -23 dBm and -30 dBm,
respectively.
PERFORMANCE TESTS
4. Set the OUTPUT FREQUENCY of Signal Generators 1 and 2 as follows, and repeat
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