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Agilent Technologies, Inc. www.agilent.com
24001 E. Mission
Liberty take, WA 99019
Agilent Technologies
..':Pi;..
,* : %
. ** ,
: Innovating the HP Way
June 8,2000
Dear Customer,
As of November 1, 1999, four of Hewlett-Packard's businesses, test and measurement,
semiconductor products, health care solutions, and chemical analysis became a new company,
Agilent Technologies. Now, many of your Hewlett-Packard products and services are in the care of
Agilent Technologies.
At Agilent Technologies, we are working diligently to make this transition as smooth as possible for
you. However, as a result of this transition, the products and related documentation contained in this
shipment may be labeled with either the Hewlett-Packard name and logo, the Agilent Technologies
name and logo, or a combination of both. Information in this package may refer to Hewlett-Packard
(HP), but applies to your Agilent Technologies product. Hewlett-Packard and Agilent branded
products with the same model number are interchangeable.
Whatever logo you see, the information, products, and services come from the same reliable source.
If you have questions about Agilent Technologies products and services, please visit our website at
http://www.aailent.com.
Sincerely,
Rebranding Team
,
HP 8901B
MODULATION ANALYZER
Operation and Calibration Manual
SERIAL NUMBERS
This manual provides complete information for in-
struments with serial-numberprefixes:
2314A and Above and all MAJOR changes that apply to your instrument.
rev.28MA Y93
Information for MAJOR changes is also provided for
instruments with serial-number prefixes not listed
in the above range.
For additional important information about serial
numbers, refer to "INSTRUMENTSCOVERED BY
THIS MANUAL"in Section 1.
S x h Edition
it
T i material m a y be reproduced by or for the U.S.
hs
Government pursuant to the Copyright License un-
der the clause at DFARS 52.227-7013(AF'R 1988).
Copyright@HEWLETT-PACKARD COMPANY 1989
EAST 24001 MISSION AVENUE, LIBERTY LAKE, WASHINGTON, U.S.A. 99019-9599
Operation and Calibration Manual HP Part 08901-90113
Other DocumentsAvailable:
Service Manual (Volume 2,3,4) HP Part 08901-90114
Basic Operation and ApplicationGuide 08901-90117
Microfiche operation and Calibration Manual HP Part 08901-90115
Microfiche Service Manual HP Part 08901-90116 Printed in U.S.A. : May 1995
Fa HEWLETT
PACKARD
1 Regulatory Information
(Updated March 1999)
1
RegulatoryInformation (Updated March 1999)
Safety Considerations
GENERAL
This product and related documentation must be reviewed for familiarization with safety
markings and instructions before operation.
This product has been designed and tested in accordance with IEC Publication 1010,
"Safety Requirements for Electronic Measuring Apparatus," and has been supplied in a
safe condition. This instruction documentation contains information and warnings which
must be followed by the user to ensure safe operation and to maintain the product in a safe
condition.
SAFETY EARTH GROUND
A uninterruptible safety earth ground must be provided from the main power source to the
product input wiring terminals, power cord, or supplied power cord set.
SAFETY SYMBOLS
A Indicates instrument damage can occur if indicated operating limits are exceeded.
A Indicates hazardous voltages.
Indicates earth (ground) terminal
~~~~~
WARNING A WARNING note denotes a hazard. It calls attention to a procedure,
practice, or the like, which, if not correctly performed or adhered to,
could result in personal i j r .Do not proceed beyond a WARNING
nuy
sign until the indicated conditions are fully understood and met.
CAUTION A CAUTION note denotes a hazard. It calls attention to an operation
procedure, practice, or the like, which, if not correctly performed or adhered
to, could result in damage to or destruction of part or all of the product. Do
not proceed beyond an CAUTION note until the indicated conditions are fully
understood and met.
2 Chapter 1
Regulatory Information (Updated March 1999)
Safety Considerations for this Instrument
WARNING This product is a Safety Class I instrument (provided with a
protective earthing ground incorporated in the power cord). The
mains plug shall only be inserted in a socket outlet provided with a
protective earth contact. Any interruption of the protective
conductor inside or outside of the product is likely to make the
product dangerous. Intentional interruption is prohibited.
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 auto transformer (for
voltage reduction), make sure the common terminal is connected to
the earth terminal o the power source.
f
If this product is not used as specified,the protection provided by
the equipment could be impaired. This product must be used in a
normal condition (in which all means for protection are intact) only.
No operator serviceable parts in this product. Refer servicing to
qualified personnel. To prevent electrical shock, do not remove
covers.
Servicing instructions are for use by qualified personnel only. To
avoid electrical shock, do not perform any servicing unless you are
qualified to do so.
The opening of covers or removal of parts is likely to expose
dangerous voltages. Disconnect the product from all voltage sources
while it is being opened.
The power cord is connected to internal capacitors that my remain
live for 5 seconds after disconnecting the plug from its power supply.
For Continued protection against fire hazard, replace the line fuse(s)
only with 250 V fuse(s) or the same current rating and type (for
example, normal blow or time delay). Do not use repaired fuses or
short circuited fuseholders.
Always use the three-prongac power cord supplied with this
product. Failure to ensure adequate earth grounding by not using
this cord may cause product damage.
This product is designed for use in Installation Category 1 and
1
Pollution Degree 2 per IEC 1010 and IEC 664 respectively. FOR
INDOOR USE ONLY.
This product has autoranging line voltage input, be sure the supply
voltage is within the specified range.
Chapter 1 3
Regulatory Information (Updated March 1999)
To prevent electrical shock, disconnect instrument from mains (line)
before cleaning. Use a dry cloth or one slightly dampened with water
to clean the external case parts. D o not attempt to clean internally.
Ventilation Requirements: When installing the product in a cabinet,
the convection into and out of the product must not be restricted.
The ambient temperature (outside the cabinet) must be less than the
maximum operating temperature of the product by 4" C for every 100
watts dissipated in the cabinet. If the total power dissipated in the
cabinet is greater than 800 watts, then forced convection must be
used.
Product Markings
CE - the CE mark is a registered trademark of the European Community. A CE mark
accompanied by a year indicated the year the design was proven.
CSA - the CSA mark is a registered trademark of the Canadian Standards Association.
4 Chapter 1
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 calibration 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
of one year from date of shipment. During the warranty period, Hewlett-Packard Company will a t 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 designated by HP. Buyer shall
prepay shipping charges to H P and H P 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.
H P warrants that its software and firmware designated by H P for use with an instrument will execute its
programming instructions when properly installed on that instrument. HP does not warrant that the operation
of the instrument, or software, or firmware 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 modification or misuse, operation outside of the environmental
specifications for the product, or improper site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLED. HP SPECIFICALLY DISCLAIMS THE IMPLED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES. HP SHALL
NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
Product maintenance agreements and other customer assistance agreements are available for Hewlett-Packard
products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Office. Addresses are provided at
the back of this manual.
iii
Saftey Considerations Model 8901B
SAFETY CONSIDERATIONS
GENERAL
This product and related documentation must be re-
viewed for familiarization with safety markings and
Any interruption of the protective (ground-
instructions before operation.
ing) conductor (inside or outside the instru-
This product is a Safety Class I instrument (provided ment) or disconnecting the protective earth
with a protective earth terminal). terminal will cause a potential shock hazard
that could result in personal injury. (Ground-
BEFORE APPLYING POWER ing one conductor of a two conductor outlet
Verify that the product is set to match the available is not sufficient protection).
line voltage and the correct fuse is installed.
Whenever it is likely that the protection has
SAFETY EARTH GROUND been impaired, the instrument musl be made
An uninterruptible safety earth ground must be pro- inoperative and be secured against any unin-
vided from the main power source to the product input tended operation.
wiring terminals, power cord, or supplied power cord
set. I f this instrument is to be energized via a n
autotransformer (for voltage reduction) make
SAFETY SYMBOLS sure the common terminal is connected to the
A Instruction manual symbol: the product will
be marked with t h i s symbol when i t
is necessary for the user t o refer to the instruction
earth terminal of the power source.
Servicing instructions are for use by service-
manual (refer t o Table of Contents). trained personnel only. To avoid dangerous
f
electric shock, do not perform any servicing
unless qualified to do so.
Indicates hazardous voltages.
Adjustments described in the manual are per-
Indicates earth (ground) terminal.
formed with power supplied to the instrument
while protective covers are removed. Energy
T h e W A R N I N G sign denotes a
available at many points may, if contacted, re-
h a z a r d . I t calls a t t e n t i o n t o a
sult in personal injury.
procedure, practice, or the like, which, if not correctly
performed or adhered to, could result in personal in-
jury. Do not proceed beyond a WARNING sign until
Capacitors inside the instrument may still be
the indicated conditions are fully understood and met.
charged even if the instrument has been dis-
connected from its source of supply.
The CAUTION sign denotes a haz-
ard. I t calls a t t e n t i o n t o a n For continued protection against fire hazard,
operating procedure, practice, or the like, which, if not replace the line fuse(s) only with 250V fuse(s)
correctly performed or adhered to, could result in dam- of the same current rating and type (for exam-
age to or destruction of part or all of the product. Do ple, normal blow, time delay, etc.). Do not use
not proceed beyond a CAUTION sign until the indi- repaired f u s e s o r s h o r t c i r c u i t e d
cated conditions are fully understood and met. fuseholders.
iv
Model 8901B Saftey Considerations
ATTENTION
Static Sensitive
Devices
This instrument was constructed in an E S D (electro-static dis-
charge) protected environment. This is because most of the semi-
conductor devices used in this instrument are susceptible to damage
by static discharge.
Depending on the magnitude of the charge, device substrates can
be punctured or destroyed by contact or mere proximity of a static
charge. The results can cause degradation of device performance,
early failure, or immediate destruction.
These charges are generated in numerous ways such as simple con-
tact, separation of materials, and normal motions of persons
working with static sensitive devices.
When handling or servicing equipment containing static sensitive
devices, adequate precautions must be taken to prevent device darn-
age or destruction.
Only those who are thoroughly familiar with industry accepted
techniques for handling static sensitive devices should attempt to
service circuitry with these devices.
I n all instances, measures must be taken to prevent static charge
build-up on work surfaces and persons handling the devices.
For further information on ESD precautions, refer to "SPECIAL
HANDLING CONSIDERATIONS FOR STATIC S E N S I T I V E
DEVICES" in Section VIII Service Section.
V
Model 8901B Contents
CONTENTS
Section 1 .General Information
Introduction to This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Operation and Calibration Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 .
1
Service Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.
Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
Instniments Covered by This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
.
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
SerialNumbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Documentation Updating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
A Description of the Manual Update Packet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Signing Up for the Documentation Update Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Hewlett-Packard Interface Bus (HP-IB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Selecting the HP-IB Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Additional Equipment Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Accessories Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Electrical Equipment Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Mechanical Equipment Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Description of the Modulation Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
RF Power Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
RF Fkequency Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Modulation Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Filters, De-emphasis Networks and Modulation Calibrators . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Additional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Specialhctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Extending Measurement Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Programmability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Principles of Operation Using A Simplified Block D a r m . . . . . . . . . . . . . . . . . . . . . . . . . . .
iga 1-8
RF Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
LOCircuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
IFCircuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Audio Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Modulation Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Amplitude Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Exponential Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Other Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
vii
Contents Model 8901B
Section 2 .Installation
Introduction to This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.
Preparation for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1
Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.
2
Line Voltage and Fuse Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
.
HP-IB Address Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
.
Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8
Mating Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8
Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8
Bench Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8
RackMounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Removal and Installation of Operating Information Pull-Out Cards . . . . . . . . . . . . . . . . . . . . . 28
.
Storage and Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.
9
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.
9
Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Section 3 .Operation
Introduction to This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.
Local Operation Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.
Remote Operation Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.
Basic finctional Checks Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1
Detailed Operating Instructions Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .
2
Other Sources of Operating Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2
.
Operating Characteristics of the Measuring Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2
.
Operator's Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ;. . . . . . . . . . . . . . . 3.2
Fbes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Time Base 10 MHz Input and Time Base 10 MHz Output . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Turn-On Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Instrument Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Front-Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Rear-Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Remote Operation VIA the Hewlett-Packard Interface Bus (HP-IB) . . . . . . . . . . . . . . . . . . . . . 3-13
Introduction to the Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
How to Use this Section to Make a Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Programming the Modulation Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Valid Programming Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Invalid Characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Programming Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Code String Syntax (Sequence Dependency) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Programming Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Reference Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Data Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Data Output Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
HP-IB Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
HP-IB Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
HP-IB Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
viii
Model 8901B Contents
Section 3 .Operation (cont'd)
Modulation Analyzer Remote Capabilities (IEEE-488) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Triggering Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Trigger Modes (TO and T1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Triggers (T2. GET. and the CLEAR Key) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T3. 3-23
Clear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Remote/Local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Mode Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Mode Transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Local Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Clear Lockout/Set Local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
Service Request Message (SRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
SRQ MASK (Special Fbnction 22) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29
StatusByte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31
Abort . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Pass Controlflake Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Status Bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Annunciators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Reading the HP-IB Address Switch and SRQ Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33
TALK and LISTEN Status Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34
Code Execution in the Modulation Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34
Basic b c t i o n a l Checks of the Modulation Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-47
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-47
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-47
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-47
Basic b c t i o n a l Checks of the Hewlett-Packard Interface Bus (HP-IB) . . . . . . . . . . . . . . . . . . . 3-56
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-56
Initial Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-57
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-57
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-57
Detailed Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-67
Introduction to This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-67
Section Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-67
How to Find Information About a Specific Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 3-67
F Power and Level Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
W 3-69
Frequency Measurements (RF, LO. IF) Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-109
Modulation Measurements Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-133
Audio Measurements Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-197
Additional Capabilities Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-205
Section 4 .Performance Tests
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
Performance Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
Calibration Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
Abbreviated Performance Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
i
x
Contents Model 8901B
Section 4 .Performance Tests (cont'd)
Performance Test 1 .AM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
.
4
Performance Test 2 .FM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
.
4
Performance Test 3 .cPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Performance Test 4 .Audio Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Performance Test 5 .Audio Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Performance Test 6 .Power Reference (Using Reference Comparison . . . . . . . . . . . . . . . . . . . . . 4-25
Performance Test 7 .Power Reference (Using DC Substitution) . . . . . . . . . . . . . . . . . . . . . . . 4-26
Performance Test 8 .Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
Performance Test 9 .SWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
Performance Test 10 .High-Selectivity (Options 032 and 033) . . . . . . . . . . . . . . . . . . . . . . . . 4-33
Performance Test 11 .High-Selectivity Gain (Option Series 030) . . . . . . . . . . . . . . . . . . . . . . . 4-38
Performance Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40
Section 5 .Adjustments
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
.
5
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
.
5
W i p m e n t Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
.
5
F'actory-Selected Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
.
5
Post-Repair Tests, Adjustments, and Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
.
2
Related Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
.
5
Adjustment 1 . Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
.
Adjustment 2 . Internal Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
.
6
Adjustment 3 . Level Detector Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF 5
.
7
Adjustment 4 . Sampler Efficiency and Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
.
5
Adjustment 5 . Doubler Output Power and Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LO 5-10
Adjustment 6 . Voltmeter Offset and Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
Adjustment 7 . kHz and >20 kHz Low-Pass Filter Gain . . . . . . . . . . . . . . . . . . . . . . . . . .
15 5-14
Adjustment 8 . ALC Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
Adjustment 9 . Calibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 5-16
Adjustment 10 . Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 5-17
Adjustment 11 . Flatness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 5-18
Adjustment 12 . Distortion and Incidental AM .. MHz IF' . . . . . . . . . . . . . . . . . . . . . .
FM 15 5-19
Adjustment 13 .P Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
cM 5-21
Adjustment 14 . AM Calibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-23
Adjustment 15 . AM Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24
Adjustment 16 . Distortion and Incidental AM . kHz IF . . . . . . . . . . . . . . . . . . . . . . .
FM 455 5-25
Adjustment 17 . Tkack-The Mode Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27
Adjustment 18 . Power Reference (Using Reference Comparison . . . . . . . . . . . . . . . . . . . . . . . 5-28
Adjustment 19 . Power Reference (Using DC Substitution . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-30
Adjustment 20 . Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33
Adjustment 21 . Audio True RMS Detector and Notch Filter Gain . . . . . . . . . . . . . . . . . . . . . . 5-35
Adjustment 22 . Battery Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-37
X
General Information Model 8901B
MODEL 8901B
LINE POWER CABLE
Figure 1-1. HP 8901B Modulation Analyzer and Supplied Accessories
1-0
Model 8901B General Information
Section 1
GENERAL INFORMATION
1-1. INTRODUCTION TO THIS MANUAL
The H P 8901B Operating and Service Manual is comprised of an Operation and Calibration Manual
and the three volume Service Manual. These four volumes contain all the information required to
install, operate, test, adjust, and service the Hewlett-Packard Model 8901B Modulation Analyzer.
The information to operate and service this instrument is made available as follows: Sections 1through
5 are contained in this Operation and Calibration Manual (that includes the Basic Operation and
Application Guide) which is provided with each instrument. Sections 6 through 8 are contained in the
Service Manual that is not included with the instrument but which can be obtained by mailing in the
Service Manual Request Card included in this manual.
The Modulation Analyzer is shown in Figure 1-1with all supplied accessories. These manuals document
Modulation Analyzers supplied with Options 001,002,003,004, and series 030.
Operation and Calibration Manual
Section 1, General Information describes the instruments documented by this manual and covers
instrument description, options, accessories, specifications and other basic information. This section
also contains instrument theory of operation on a simplified block diagram level.
Section 2, Installation provides information about initial inspection, preparation for use (including
address selection for remote operation), and storage and shipment.
Section 3, Operation provides information about panel features and includes operating checks, and
operating instructions for both local and remote operation.
Section 4, Performance Tests provides the information required to check performance of the
instrument against the critical specifications in Table 1-1.
Section 5, Adjustments provides the information required to properly adjust the instrument.
Service Manual
Section 6, Replaceable Parts provides ordering information for all replaceable parts and assemblies.
Section 7, Instrument Changes provides backdating information, and retrofitting and modifica-
tion information.
Section 8, Service provides the information required to repair the instrument.
Additional copies of the Operation and Calibration Manual or the Service Manual can be ordered
separately through your nearest Hewlett-Packard office. The part numbers are listed on the title page
of this manual.
1-1
General Information Model 8901B
1-2. SPECIFICATIONS
Instrwnent specifications are listed in Table 1-1. These are the performance standards, or limits,
against which the instrument may be tested. Information listed in this table as Supplemental Char-
acteristics, are not warranted specifications but are typical characteristics included as additional
information for the user.
1-3. SAFETY CONSIDERATIONS
This product is a Safety Class I instrument (that is, provided with a protective earth terminal).
The Modulation Analyzer and all related documentation m s be reviewed for familiarization with
ut
safety markings and instructions before operation. Refer to the Safety Considerations page found at
the beginning of this manual for a summary of the safety information.
Safety information pertinent to the task at hand (installation, operation, performance testing,
adjustment or service) is found throughout these manuals.
1-4. RECOMMENDED TEST EQUIPMENT
Table 1-2 lists the test equipment and accessories recommended for use in testing, adjusting,
and servicing the Modulation Analyzer. If any of the recommended equipment is unavailable,
instruments with equivalent minimum specifications may be substituted. Table 1-2 also includes
some alternate equipment listings. Table 1-3 lists a number of accessories required in addition t o
those contained in the Service Accessory Kit, HP 08901-60287.
1-5. INSTRUMENTS COVERED BY THIS MANUAL
Options
Electrical options 001,002,003,004, series 030, and various mechanical options are documented in
these manuals. The differences are noted under paragraph 1-8, Options, in Table 6-3, Replaceable
Parts, and in the schematic diagrams in Section 8.
Serial Numbers
Attached to the instrument is a serial number plate. The serial number is in the form 1234A00123.
The f i s t four digits and the letter are the serial prefix. The last five digits form the sequential suffix
that is unique t o each instrument. The contents of these manuals apply directly to instruments
having the same serial number prefix(es) as listed under SERIAL NUMBERS on the respective
manual title pages.
For information concerning a serial number prefix not listed on the title page or in the Manual
Changes supplement, contact your nearest Hewlett-Packard office.
1-6. MANUAL UPDATING
This manual may be revised as needed to make corrections and to document hardware and firmware
changes. The latest revision of the manual c a n be purchased from the Hewlett-Packard locations
shown below.
1-2 rev.28MA Y93
Model 8901B General Information
Inside the U.S.A.
Call HP Parts Direct Ordering at 800-227-8164.They can also help determine if a new revision is
available.
Outside the U.S.A.
Contact the local Hewlett-Packard Sales and Service office for ordering information.
1-7. HEWLETT-PACKARD INTERFACE BUS (HP-IB)
Cornpatibility
The Modulation Analyzer's capabilities are defmed by the following interface functions: SH1, AH1,
T5, TEO, L3, LEO, SR1, RL1, PPO, DC1, DT1,CO. The Modulation Analyzer interfaces with the bus
via open-collectorTTL circuitry. An explanation of the compatibility code may be found in IEEE
Standard 488- 1978, IEEE Standard and Digital Interface for Programmable Instrumentation or
the identical ANSI Standard MC 1.1.
For more detailed informationrelating to programmable control of the Modulation Analyzer, refer t o
Remote Operation, Hewlett-Packard Interface Bus in Section 3 of this Operating Information manual.
Selecting the HP-IB Address
The HP-IB address switches are located within the Modulation Analyzer. The switches represent a
five-bit binary number. This number represents the talk and listen address characters which the
controller must generate. In addition, two more switches allow the Modulation Analyzer to be set t o
talk only or t o listen only. A table in Section 2 shows all HP-IB talk and listen addresses. Refer to
HP-IB Address Selection in Section 2 of this Operation and Calibration manual.
1-8. ADDITIONAL EQUIPMENT INFORMATION
0ptions
Options are variations on the standard instrument which can be ordered during the purchase. The
following list defines all currently available options. Refer to Electrical Equipment Available in this
section for retrofit part numbers that can be ordered after the purchase.
Option 001. This option provides rear-panel (instead of front-panel) connections for RF IN-
PUT, SENSOR input, MODULATION OUTPUT/AUDIO INPUT, and AMYFM and RF POWER
CALIBRATION OUTPUTS.
Option 002. This option provides a high-stability (1 x 10-g/day)internal reference oscillator in
place of the standard reference oscillator. In addition, a 10 MHz time base output is provided on the
rear panel.
rev.28MA Y93 1-3
General Information Model 8901B
Option 003. This option provides both an output for the internal local oscillator signal and an input
for an external local oscillator signal. Both connections are located on the rear panel. (Thisoutput is
provided automatically with option 030 series instruments.)
Option 004. This option allows operation at line frequencies ranging from 48 to 400 Hz. Operation
at frequencies greater than 66 Hz is restricted to less than 126.5 Vac line input.
Option 030. The High Selectivity Measurement option provides the capability to measure single-
sideband carrier noise (AM or phase) quickly and accurately up to 1.3 GHz with an external LO. (An
output for the internal local oscillator and an input for an external local oscillator signal is provided
with these options.) This option is ordered with one of the following filter options:
Option 032. This option provides a 12.5 kHz adjacent channel filter.
Option 033. This option provides a 25 kHz adjacent channel filter.
Option 035. This option provides a 30 kHz (Cellular Radio) alternate channel filter.
Option 037. This option provides a carrier noise filter.
Options 907-909. These options are described in Mechanical Equipment Available.
Option 910. This option provides an extra copy of both the Operation and Calibration Manual and
the Service Manual.
Accessories Supplied
The Accessories Supplied are pieces of equipment which are shipped automatically with every
Modulation Analyzer.
Line Power Cable. The line power cable may be supplied in several plug configurations, depending
on the destination of the original shipment. Refer to Power Cables in Section 2 of this Operating
Information manual.
Fuses. F b e s with a 2.5A rating for 115 Vac (HP 2110-0083)and a 1.5A rating for 230 Vac (HP
2110-0043)are supplied. One fuse is factory installed according to the voltage available in the country
of original destination. Refer to Line Voltage and h e Selection in Section 2 of this Operating
Information manual.
Electrical Equipment Available
This equipment is available to be ordered for the Modulation Analyzer after the time of sale.
HP-IB Controller. The Modulation Analyzer has an HP-IB interface and can be used with any HP-IB
compatible computing controller or computer for automatic systems applications.
Sensor Module. The HP 11722A and 11792A Sensor Modules enable you to characterize a signal
using a single input connector. Switching back and forth between the Modulation Analyzer's SENSOR
input and RF INPUT connectors happens automatically with these modules (which contain an internal
switch). The H P 11722A covers the Erequency range 100 kHz to 2 6 GHz; the H P 11792A covers the
.
range 50 MHz to 26.5 GHz and is intended for use with the H P 11793A Down Converter. Special care
is taken with each sensor module to minimize input SWR and resulting errors. A low SWR attenuator
isolates the power sensor from the source-under-test, reducing mismatch. Microwave hardware and a
selected RF input cable further improve SWR and insertion loss.
1-4
Model 8901B General Information
Down Converter. The HP 11793A Down Converter, when used with a suitable local oscillator, extends
the useful range of the Modulation Analyzer into the microwave region. Provisions have been made in
the Modulation Analyzer to account for the frequency of the local oscillator and provide direct display
of the frequency of the microwave input signal.
Test Source. The H P 11715A AMFM Test Source produces extremely linear AM and FM at
high rates as well as a low-noise CW signal. This source is required for performance testing and
adjusting the Modulation Analyzer; however, it is an excellent stand-alone instrument for generating
very low-distortion FM in the broadcast band.
Service Accessory Kit. A Service Accessory Kit (HP 08901-60287) is available which contains
accessories (such as extender boards and cables) useful in servicing the Modulation Analyzer.
Front-to-Rear-Panel Connectors Retrofit Kit (Option 001). This kit contains all the necessary
components and full instructions for converting front-panel connections to rear-panel connections.
Order HP part number 08901-60282.
Rear-to-Front-Panel Connectors Retrofit Kit (Standard). This kit contains al the necessary
l
components and full instructions for converting Option 001 instruments with rear-panel connections
to instruments with front-panel connections. Order HP part number 08901-60283.
High-Stability, Internal-Reference Retrofit Kit (Option 002). This kit contains all the necessary
components and full instructions for installation of the high-stability, internal-reference oscillator.
Order HP part number 08901-60281.
Rear-Panel Local Oscillator Connections Retrofit Kit (Option 003). This kit contains all the
necessary components and full instructions for installation of rear-panel local oscillator connections.
Order HP part number 08901-60280. (These connections are already included in all Option 030
Series instruments.)
Conversion to 400 Hz Line Operation. Modulation Analyzers not equipped to operate at line power
frequencies greater than 66 Hz may be converted to operate at line frequencies from 48 to 440 Hz.
However, operation at line frequencies greater than 66 Hz will be restricted to line voltages less than
or equal to 126.5 Vac. To convert to 400 Hz operation, order H P part number 08901-60095. After
installation, performance will be identical to the H P 8901B Option 004.
Mechanical Equipment Available
The following kits might have been ordered and received with the Modulation Analyzer as options. If
they were not ordered with the original shipment and are now desired, they can be ordered from the
nearest Hewlett-Packard office using the appropriate part number.
Front-Handle Kit (Option 907). Ease of handling is increased with the front-panel handles. Order H P
part number 5061-9690 for the basic kit and 2190-0048 for lockwashers (8 required).
Rack-Flange Kit (Option 908). The Modulation Analyzer can be solidly mounted to the instrument
rack using the flange kit. Order HP part number 5061-9678.
Rack-Flange and Front-Handle Combination Kit (Option 909). This is not a front-handle kit and
a rack-flange kit packaged together; it is composed of a unique part which combines both functions.
Order HP part number 5061-9684 for the basic kit and 2190-9609 for lockwashers (8 required).
1-5
General Information Model 8901B
Chassis Slide-Mount Kit. This kit is extremely useful when the Modulation Analyzer is rack
mounted. Access to internal circuits and components or the rear panel is possible without removing
the instrument from the rack. Order H P part number 1494-0017 for 432 mm (17 in.) fixed slides. (To
order adapters for non-HP rack enclosures, use HP part number 1494-0023.)
Chassis-Tilt, Slide-Mount Kit. This kit is the same as the Chassis Slide Mount Kit above except it
also allows the tilting of the instrument up or down 90". Order HP part number 1494-0025 for 432 mm
(17 in.) tilting slides. To order adapters for non-HP rack enclosures, use HP part number 1494-0023.
1-9. DESCRIPTION OF THE MODULATION◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo