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Errata
Title & Document Type: 8903E Operation & Calibration
Manual
Manual Part Number: 08903-90053
Revision Date: July 1985
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
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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.
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Search for the model number of this product, and the resulting product page will guide
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HP 8903E
Distortion Analyzer
Operation and
Calibration Manual
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Ag iIent TechnoIogies
HP 8903E
DISTORTION ANALYZER
(Including Option 001)
SERIAL NUMBERS
This manual applies directly to instruments with
serial numbers prefixed 2507A and 2516A.
For additional important information about serial
numbers, see Instruments Covered by Manual in
Section 1.
First Edition
@HEWLET-PACKARD COMPANY 1985
EAST 24001 MISSION AVENUE, TAF C-34, SPOKANE, WASHINGTON, U S A . , 99220
Operation and Calibration Manual Part No. 08903-90053
Operation and Calibration Manual Microfiche Part No. 90069 Printed: JULY 1985
1 Regulatory Information
(Updated March 1999)
1
Regulatory Information (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 Pubhation 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.
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 injury.Do not proceed beyond a WARNING
sign until the indicated conditions are f l s understood and met.
ul
CAUTION A CAUTION note denotes a hazard. It calls attention to a n 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 of the power source.
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-prong ac 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 I1 and
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.
Chapter 1
Model 89033 Safety Considerations
SAFETY CONSIDERATIONS
GENERAL
This product and related documentation must be re-
viewed for familiarization with safety markings and
A n y 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 i n 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 must 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 an
autotransformer (for voltage reduction) make
SAFETY SYMBOLS sure the common terminal is connected to the
earth terminal of the power source.
Instruction manual symbol: the product will
be marked with t h i s symbol when i t
is necessary for the user to refer to the instruction Servicing instructions are for use by service-
manual (refer to 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
The WARNING sign denotes a
available at many points may, if contacted, re-
hazard. It calls attention to a sult i n 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-
a r d . I t calls a t t e n t i o n t o an 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 fuses o r short circuited
cated conditions are fully understood and met. fuseholders.
...
111
Safety Considerations Model 89033
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.
W h e n handling or servicing equipment containing static sensitive
devices, adequate precautions must be taken to prevent device dam-
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 E S D precautions, refer to "SPECIAL
HANDLING CONSIDERATIONS FOR STATIC S E N S I T I V E
D E VICES" in Section VIII Service Section.
iv
Model 8903E Table of Contents
CONTENTS
VOLUME 1 Page
. Page
.
Section 1 Section 2
GENERAL INFORMATION INSTALLATION
Introduction . . . . . . . . . . . . . . . . . . . . . ................................ 2-1
Specifications . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1
Safety Considerations ..................... 1-1 Preparation for Use ............................. 2-1
Instruments Covered by Manual . . . . . . . . . . . . . . . . . . 1-1 Power Requirements ........................... 2-1
Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Line Voltage and Fuse Selection . . . . . . . . . . . . . . . . 2-1
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
HP-IB Address Selection ....................... 2-2
Manual Changes Supplement . . . . . . . . . . . . . . . 1-2 Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
. . . . . . . . . . . . . . . . . 1-2 Mating Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
............................. 1-2 Interface Connector ......................... 2-4
Audio Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Coaxial Connectors .......................... 2-4
Balanced Input .......................... Operating Environment ........................ 2-4
Transceiver Testing . . . . . . . . . . . . . . . . . 1-3 Bench Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Rack Mounting ............................... 2-5
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Storage and Shipment ........................... 2-5
Electrical Options ............................. 1-3 Environment ................................. 2-5
Packaging .................................... 2-5
Electrical Option 001 ........................ 1-3
Original Packaging . . . . . . . . . . . . .
Internal Plug-in Filter Options . . . . . . . . . . . . . . . . 1-3 Other Packaging . . . . . . . . . . . . . . .
Mechanical Options ........................... 1-4
Front Handle Kit (Option 907) . . . . . . . . . . . . . . . 1-4 Section 3
Rack Flange Kit (Option 908) . . . . . . . . . . . . . . . . 1-4 OPERATION
Rack Flange and Front Handle Introduction .......................
Combination Kit (Option 909) . . . . . . . . . . . . . . 1-4 General ...................................... 3-1
Hewlett-Packard Interface Operatingg Characteristics . . . . . . . . . . . . . . . . . . 3-1
BUS (HP-IB) ................................. 1-4 Turn-On Procedure ............................ 3 - 1 A
Compatibility . . . . . . . . . . . . 1-4 Local Operation ............................... 3-1
Selecting the HP-IB Address . . . . . . . . . . . . . . . . . . . 1-4 Simplified Operation ......................... 3-2
Accessories Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Panel Features .......................
Electrical Equipment Available . . . . . . . . . . . . . . . . . . . 1-4 Detailed Operating Instructions . . . . . . . .
HP-IB Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Supplemental Information .................... 3-2
Remote Operation (HP-IB) . . . . . . . . .
Front-to-Rear-Panel Connectors
Operator's Checks ............................. 3-2
Retrofit Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Basic Functional Checks ..................... 3-2
Rear-to-Front-Panel Connectors HP-IB Functional Checks .................... 3-2
Retrofit Kit . . . . . . . . . . . . . . . 1-6 Operator's Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Mechanical Equip Operator's Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Basic Functional Checks ........
Chassis Slide Mount Kit ....................... 1-6 Preliminary Check . . . . . . . . . . .
Chassis Tilt Slide Mount Kit . . . . 1-6 Filter Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Recommended Test Equipment . . . . . . . . . . . . . . . . . . . 1-6 Distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Principles of Operation for SINAD Check ............................. 3-10
Simplified Block Diagram . ........ DC Level Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Voltmeter and Notch Filter . . . . . . . . . HP-IB Functional Checks . . . . . . . . . . . . . . . . . . . . . 3-11
Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Address Recognition . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Voltage Measurement . . . . . . . . . . . . . . . . . . . . . . . . 1-8 Remote and Local Messages and the LCL Key 3-12
Input Frequency Measurement . . . . . . . . . . . . . . . . 1-8 Sending the Data Message . . . . . . . . . . . . . . . . . . 3-13
Controller . . Receiving the Data Message . . . . . . . . . . . . . . . . . 3-13
Local Lockout and Clear
Basics of Audio
Lockout/Set Local M . . . . . . . . . . . . . . . 3-13
AC Level . . . . . . . . . . . . . . . . . . . . . . . Clear Message . . . . . . . 3-14
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 Abort Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
DC Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 Status Byte Message . . . . . . . . . . . . . . . . . . . . . . . 3-16
Signal Impurities . . . . . . . . . . . . . . . . . . 1-9 Require Service Message . . . . . . . . . . . . . . . . . . . . 3-17
Distortion . . . . . . . . . . . . . . Trigger Message and Clear
SINAD . . . . . . . . Key Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
V
Table of Contents Model 89033
CONTENTS (cont'd)
-
Page Page
-
Remote Operation, Hewlett-Packard DETAILED OPERATING INSTRUCTIONS 3-33
Interface Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19 .......................... 3-33
HP-IB Compatibility . . . . . . . . . . . . . . 3-19 ion . . . . . . . . . . . . . . . . . . . . . . 3-35
....................... 3-19 Common Mode . . . . . . . . . . . . . . . . . . . . . . . 3-36
.................... 3-19 DC Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39
Local Mode . . . . . . . . . . . . . . . . . . . . . . . . 3-19 Default Conditions and Power-up
Local Capability . . . . . . . . . . . . . . . . . . . . . . 3-19 Sequence ....................
Remote-to-Local Mode Changes . . . . . . . . 3-19 Detector Selection . . . . . . . . . . . . . .
Addressing . . . . . . . . . . . . . . . . . . . . . . . . 3-19 Display Level in Watts . . . . . . . . . . . . . . .
Local Lockout . . . . . . . . . . . . . . . . . . . . . . . . 3-21 Distortion . . . . . . . . . . . . . . . . . . . . . . . . 3-43
Data Messages ...................... . . . . . . . . . . . . . . . . . . . 3-45
Receiving the Data Message . . . . . . . . . . . . . . 3-21 Error Disable . . . . . . . . . . . . . . . . . . . . 3-47
Listen Only . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21 Error Message Summary . . . . . . . . . . . . . . . . . . . 3-48
Data Input Format . . . . . . . . . . . . . . . . . . . . 3-22 Filters ......................... . . . . . . 3-51
Program Codes ....................... 3-22 . . . . . . . . . . . . . . . . . . . . . . . . . . 3-55
Turning Off Functions . . . . . . . . . . . . nt . . . . . . . . . . . . . . . . . . . . . . . 3-57
Programming Numeric Data . . . Hold Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-58
General Numeric Data Input Format . . . . 3-23 HP-IB Address ........................... 3-59
Triggering Measurements with the Input Level Range (DC Level) . . . . . . . . . . . . . 3-61
Data Message . . . . . . . . . . . . . . . . . . . . . . . 3-23 Input Level Range (Except DC Level) . . . . . . . 3-62
Special Considerations for Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-64
Triggered Operation . . . . . . . . . . . . . . Notch Tune . . . . . . . . . . . . . . . . . . . . . . . . . 3-67
Reading Data from the Right Post-Notch Detector Filtering
or Left Display ..................... 3-24 (Except SINAD) ........................ 3-68
Program Order Considerations . Post-Notch Gain . . . . . . . . . . . . . . . . . . . . 3-69
Sending the Data Message . . . . . . . . . . . . . . .3-24 Rapid Frequency Count .................... 3-70
Talk Only Mode ...................... 3-25 RATIO and LOG/LIN .................... 3-73
Talk Status Only Mode . . . . Read Display to HP-IB . . . . . . . . . . . . . . 3-75
Data Output Format . . . . . . . . . . . . . . . . . . 3-25 Service Request Condition . . . . . . . . . . . . . . . . . 3-76
Data Output Format . . . . . . . . . . . . . . . . . . 3-25 SINAD .................................. 3-78
Error Output Format . . . . . . . . . . . . . . Special Functions . . . . . . . . . . . . . . . . . . . . . 3-80
Receiving the Clear Message . . . . . . . . . . . . . 3-25 Time Between Measurements . . . . . . . . . . . . . . . 3-86
Receiving the Trigger Message . . . . . . . . . . . . 3-26
Receiving the Remote Message . . . . . . . . . . . 3-26 Section 4
Receiving the Local Message . . . . . . . . . 3-26 PERFORMANCE TESTS
Receiving the Local Introduction ....................
Lockout Message . . . . . . . . . . Equipment Required . . . . . . . . . . . .
Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Receiving the Clear Lockout/Set
Calibration Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
..................... 3-26
Abbreviated Performance Testing . . . . . . . . . . . . 4-1
Receiving the Pass Control Message . . . . . . 3-26 PERFORMANCE TESTS . . . . . . . . . . . . . . . . . . 4-2
Sending the Require Service Message . . . . . 3-26 AC Level Accuracy ......................... 4-2
Selecting the Service Request DC Level Accuracy . . . . . . . . . . . .
Condition . . . . . . . . . . . . . . . . . . . Residual Distortion and Noise . . . . .
Sending the Status Byte Message Distortion and SINAD Accuracy
Sending the Status Bit Frequency Accuracy and Sensitivity . . . . . . . . . 4-14
....................... Audio Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Receiving the Abort Message . . . . . . . . . . . . . 3-27 Input Impedance . . . . . . . . . . . . . . . . . . . . . . 4-22
HP-IB Syntax and Characteristics Common-Mode Rejection Ratio . . . . . . . 4-24
Summary . . . . .................... 3-29 Performance Test Record . . . . . . . . . . . . 4-26
vi
Model 89033 Table of Contents
CONTENTS (cont'd)
Page
-
Section 5
ADJUSTMENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Input Flatness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . 5-1 Common-Mode Rejection . . . . . . . . . . . . . . . . . . . 5-8
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . 5-1 Input DC Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Factory-Selected Components . . . . . . . . . . . . . . . . 5-1 400 Hz High-Pass and Weighting
Post-Repair Tests, Bandpass Filters . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Adjustments, and Checks . . . . . . . . . . . . . . . . . 5-1 Notch Filter Tune and Balance . . . . . . . . . . . . . 5-12
Related Adjustments . . . . . . . . . . . . . . . . . . . . . . . 5-2 Voltmeter (Using an HP-IB
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Controller) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Internal Reference Frequency . . . . . . . . . . . . . . . . 5-3 Voltmeter (Not Requiring an HP-IB
Controller) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
vii
Model 89033 General Information
Section 1
GENERAL INFORMATION
1-1. INTRODUCTION service manual (the HP 89033 Service Supplement and
the HP8903B Service Manual) is supplied with the
This manual contains information required to install,
instrument order.
operate, test, adjust, and service the Hewlett-Packard
Model 89033 Distortion Analyzer. This manual docu- Copies of all volumes can be ordered through your
ments options installed in the Distortion Analyzer nearest Hewlett-Packard sales office. The part num-
such as rear-panel connections and internal plug-in bers are listed on the title page of this manual.
filters. Also listed on the title page of this manual, below
This section of the manual describes the instruments the manual part number, is a microfiche part number.
documented by the manual and covers instrument This number may be used to order 100 X 150 mm
description, options, accessories, specifications, and (4X 6 inch) microfilm transparencies of this manual.
other basic information. This section also contains Each microfiche contains up to 96 photo-duplicates
principles of operation on a simplified block diagram of the manual's pages. The microfiche package also
level and basic information on audio measurements. includes the latest MANUAL CHANGES supple-
T h e o t h e r s e c t i o n s c o n t a i n t h e following ments, as well as all pertinent Service Notes.
information: 1-2. SPECIFICATIONS
Section 2, Installation: provides information about Instrument specifications are listed in Table 1-1.
initial inspection, preparation for use (including ad- These are the performance standards,or limits against
dress selection for remote operation), and storage and which the instrument may be tested. Characteristics
shipment. listed under Supplemental Information, Table 1-2,
Section 3, Operation: provides information about are not warranted specifications but are typical char-
panel features, and includes operating checks, opera- acteristics included as additional information for the
ting instructions for both local and remote operation, user.
and maintenance information. 1-3. SAFETY CONSIDERATIONS
Section 4, Performance Tests: provides the informa- This product is a Safety Class I instrument (that is,
tion required to check performance of the instrument provided with a protective earth terminal). The
against the critical specifications in Table 1- 1. Distortion Analyzer and all related documentation
must be reviewed for familiarization with safety mark-
Section 5, Adjustments: provides the information ings and instructions before operation. Refer to the
required to properly adjust the instrument. Safety Considerations page found a t the beginning
Section 6, Replaceable Parts: provides ordering in- of this manual for a summary of the safety informa-
formation for all replaceable parts and assemblies. tion. Safety information pertinent t o the task at hand
(installation, performance testing, adjustment, or
Section 7, Instrument Changes: provides instrument service) is found throughout the manual.
modification, recommendations, and procedures.
1-4. INSTRUMENTS COVERED BY MANUAL
Section 8, Service: provides the information required Serial Numbers. This instrument has a two-part ser-
to repair the instrument. ial number in the form OOOOAOOOOO which is stamped
Sections 1 through 5 are bound in this volume, the on the serial number plate attached to the rear of
Operation and Calibration Manual. Sections 6 through the instrument. The first four digits and the letter
8 are bound in two separate volumes, the Service Man- constitute the serial number prefix, and the last five
ual. The Service Manual is comprised of an HP 8903E digits form the suffix. The prefix is the same for all
Service Supplement, and an HP 8903B Service Manual. identical instruments. It changes only when a change
Copies of the Service Manual are not supplied with is made to the instrument. The suffix, however, is
the instrument unless specifically requested (as option assigned sequentially and is different for each instru-
915) at time of instrument order. The Operation and ment. The contents of this manual apply directly to
Calibration Manual is supplied with the instrument instruments having the same serial prefix(es) as listed
order. When option 915 is requested, the complete under SERIAL NUMBERS on the title page.
1-1
General Information Model 89033
Options. Electrical Option 001, internal plug-in filter For example, ac level can be displayed in V, mV,
options, and various mechanical options are docu- dBm into 600Q2, watts, or as a ratio (in % ordB)
mented in this manual. The differences are noted referenced to an entered or measured value.
under the appropriate paragraph such as Options in
Section 1, the Replaceable Parts List, and the sche- Virtually all functions are remotely programmable
matic diagrams. through the Hewlett-Packard Interface Bus (HP-IB)`.
Programming is easy and straightforward. All meas-
1-5. MANUAL CHANGES SUPPLEMENT urements are made through a single input. This elimi-
nates the need to switch between multiple inputs
An instrument manufactured after the printing of u n d e r remote control a n d reduces software
this manual may have a serial prefix that is not listed development time and hardware costs. The Distortion
on the title page. An unlisted serial prefix indicates Analyzer measures the true rms level on all ac meas-
that the instrument differs in some way from those urements. True rms measurements assure greater
documented in this manual. accuracy when measuring complex waveforms and
noise. For those applications where average detection
A "Manual Changes Supplement" is shipped with this is required, the analyzer can be switched to average
manual to provide you with the most current change responding (rms calibrated) detection via a front-
information available at the time of shipment. In panel key. Accurate distortion measurements typically
addition to change information the supplement may can be made to less than 0.003% (-9OdB) between
contain information for correcting errors in the 20 Hz and 20 kHz.
manual.
1-8. Audio Testing
To keep this manual up to date and as accurate as
possible, Hewlett-Packard recommends that you peri- The Distortion Analyzer has numerous features which
odically request the latest Manual Changes Supple- make audio testing simple and convenient. For
ment. The supplement is identified with the print example, distortion results can be displayed in %
date and part number that appears on the title page. o r a . AC level measurements can be displayed in
Complimentary copies of the supplement are available volts, dBm into 600Q, or watts. Measurement results
from Hewlett-Packard. can be displayed in % or dB relative to a measured
or entered value. Finding the 3 d B points of filters
1-6. DESCRIPTION and amplifiers is simplified by using the relative
display feature. The Distortion Analyzer also features
1-7. General high accuracy. The internal Voltmeter flatness is bet-
The H P Model 89033 Distortion Analyzer is an audio ter than 0.5% (0.05 dB) over the range of 20 Hz to
measurement system covering the frequency range of 20 kHz. Residual Distortion is typically 0.003% (-90
20Hz t o 100 kHz. The analyzer can perform dB) over the same range. See Figure 1-1.
distortion analysis, frequency count, ac level, dc level,
and SINAD measurements. The Distortion Analyzer Balanced Input. The Distortion Analyzer has a selec-
reduces the number of instruments required in many table balanced input configuration for testing bal-
applications involving audio signal characterization. anced devices. For example, in the quest for higher
output power, many audio amplifiers use bridged out-
The Distortion Analyzer is easy to use. All measure- put stages. Such amplifiers can be difficult to charac-
ments are selected by one or two keystrokes. For terize because their outputs cannot be grounded. To
distortion measurements, the Distortion Analyzer test these devices, the usual approach has been to
automatically ranges to, and tunes to the input signal. use a balanced, calibrated isolation transformer con-
Measurement and output ranges are automatically nected to an analyzer with an unbalanced input. The
selected for optimum resolution and accuracy. balanced input on the Distortion Analyzer make
transformers unnecessary. With the analyzer input
The combined capabilities of the instrument are en- in the float position, connect the bridged device di-
hanced by microprocessor control, resulting in more rectly t o t h e Distortion Analyzer t o make
capability than would be available from separate measurements.
instruments. For example, using the ratio key allows
you to set a O d B or 100% reference for making I HP-IB: Not just IEEE-488. but the hardware, documentation
frequency response measurements. Microprocessor and support that delivers the shortest path to a measurement
system.
control allows flexible and versatile display formats.
1-2
Model 89033 General Information
-70
E tones up to 250 Hz is greater than 40 dl3. Therefore,
w
??
-75
audio distortion measurements to 1% residual
g -80 distortion can be made without disabling the trans-
6
U
-80 mitter squelch tones.
5
- -a5
Under remote control, the Distortion Analyzer can
I-
a: -90 count burst tone sequences. Typically the maximum
count rate is 8 ms/reading.
1-10. Systems
The Distortion Analyzer features capabilities for gen-
-- .. . eral systems applications. The distortion measure-
FREQUENCY
ments are fully automatic, programmable, and fast.
The typical time to tune and return the first distortion
Figure 1-1. Typical Analyzer Residual
measurement is 1.5 seconds with a measurement rate
Distortion
of 2 readingslsecond thereafter. T h e residual
1-9. Transceiver Testing distortion of the analyzer is typically 0.003% (-90 dB)
between 20Hz and 20kHz.
The Distortion Analyzer has several measurements
and features specifically designed for transceiver test- Often, systems applications involve measuring low
ing. It has SINAD measurements for receiver testing, level ac signals. The Distortion Analyzer features a
optional internal plug-in weighting filters for testing full range ac level display of 0.3000mV with an
to international standards, a reciprocal counter for accuracy of 4% of reading (2% of reading for levels
measuring squelch tones, and an optional internal >50 mV and from 20 Hz to 20 kHz). The ac detector
plug-in 400 Hz high-pass filter for eliminating squelch is switchable between true rms and average respond-
tones when measuring transmitter audio distortion. ing detection. The 3 dl3 measurement bandwidth for
both detectors is greater than 500 kHz.
SINAD is one of the most basic receiver measure-
ments. It must be made repeatedly when performing Since many systems have noise problems, the
sensitivity or adjacent-channel sensitivity tests. In Distortion Analyzer has both 30 and 80 kHz low-pass
the Distortion Analyzer, the SINAD measurement is filters to reject high frequency noise. In addition, the
more heavily filtered than the distortion measurement optional internal plug-in 400 Hz high-pass filter atten-
in order to smooth the noisy signals encountered in uates line-related hum and noise by more than 68 dB.
receiver testing. The filtering is optimized for excel- A special binary programming mode is available in
lent repeatability and speed (2 readingslsecond typ- remote operation. The rapid frequency count mode
ical). Some automatic distortion analyzers have a provides a packed, four-byte output for fast counting
tendency to become untuned when measuring SINAD over HP-IB.
on noisy signals. The Distortion Analyzer overcomes
this problem by providing a front panel key which 1-11. OPTIONS
locks the notch filter at the input frequency. For 1-12. Electrical Options
SINAD ratios less than 25 cU3, a Special Function
can be used to round the digital display to the nearest Electrical Option 001. This option provides a rear-
0.5dl3 to reduce digit flicker. panel (instead of front-panel) connection for the
INPUT and MONITOR connectors.
For accurate noise ratio measurements, the Distortion
Analyzer uses true rms detection for SINAD. Most Internal Plug-in Filter Options. The Distortion
older instruments employ average detection which Analyzer has two internal plug-in filter positions;
reads low for noise. The discrepancy can be 1.5dT3 each position can be loaded with any one of six
or greater and varies with the ratio being measured. optional filters. Each filter is referenced to its corre-
For correlating results with past test data, the sponding filter position by one of two option numbers.
Distortion Analyzer's detector can be switched via a For example, the 400 Hz High-Pass Filter Option can
f r o n t - p a n e l key t o a n average r e s p o n d i n g be ordered as Option 010 which corresponds to the
configuration. left-most filter position, or as Option 050 which corre-
sponds to the right-most filter position. These op-
For transceivers, the Distortion Analyzer has an op- tional plug-in filters can be configured in any
tional, internal plug-in seven-pole 400 Hz high-pass combination desired. If there is no filter ordered for
filter for rejecting squelch tones. Rejection of squelch a position, a jumper wire is loaded and a label marked
1-3
General Information Model 89033
"No Filter" is placed above the filter key on the front the Distortion Analyzer, refer to Remote Operation,
panel. The following list includes the name and option Hewlett-Packard Interface Bus in Section 3 of this
numbers for each available filter. manual.
400 Hz High-Pass Filter (Option 010, 050). 1-16. Selecting the HP-IB Address
CCITT Weighting Filter (Option 011, 051). The HP-IB address switches are located within the
CCIR Weighting Filter (Option 012, 052). Distortion Analyzer. The switches represent a five-bit
C-MESSAGE Weighting Filter (Option 013, 053). binary number. This number represents the talk and
CCIR/ARM Weighting Filter (Option 014, 054). listen address characters which an HP-IB controller
"A" Weighting Filter (Option 015, 055). is capable of generating. In addition, two more
switches allow the Distortion Analyzer to be set to
Specific information on each plug-in filter option can talk only or listen only. A table in Section 2 shows
be found in the Detailed Operating Instructions in all HP-IB talk and listen addresses. Refer to HP-IB
Section 3 under "Filters". Address Selection in Section 2 of this manual.
1-13. Mechanical Options 1-17. ACCESSORIES SUPPLIED
The accessories supplied with the Distortion Analyzer
The following options may have been ordered and
are shown in Figure 1-2.
received with the Distortion Analyzer. If they were
not ordered with the original shipment and are now Time delay fuses with a 1.5A rating for 100/120 Vac
desired, they can be ordered from the nearest Hewlett- operation (HP 2110-0059) and a 0.75A rating for
Packard office using the part number included in 220/240 Vac operation (HP 2110-0018) are supplied.
each of the following paragraphs. The mechanical One fuse is installed in the instrument at the time
options are shown in Figure 1-2. of shipment. The rating of the installed fuse is selected
according to the line voltage specified by the customer.
Front Handle Kit (Option 907). Ease of handling is If the voltage is not specified, the rating of the in-
increased with the front-panel handles. Order H P stalled fuse will be selected according to the country
part number 5061-9689. of destination.
Rack Flange Kit (Option 908). The Distortion For Option 001 only, two type BNC-to-banana-plug
Analyzer can be solidly mounted to the instrument adapters (HP 5021-0844) are also supplied for use
rack using the flange kit. Order HP part number when double-ended inputs or outputs are desired. The
5061-9677. conductor of the banana jack is connected to the
center conductor of the BNC adapter connector.
Rack Flange and Front Handle Combination Kit These adapters are used when the front-panel INPUT
(Option 909). This is not a front handle kit and a or OUTPUT FLOAT switches are set to FLOAT.
rack flange kit packaged together; it is composed of
a unique part which combines both functions. Order 1-18. ELECTRICAL EQUIPMENT AVAILABLE
H P part number 5061-9683. (Also refer to Service Accessories, Table 1-4.)
1-14. HEWLETT-PACKARD INTERFACE BUS 1-19. HP-I6 Controllers
(HP-16)
The Distortion Analyzer has an HP-IB interface and
1-15. Compatibility can be used with any HP-IB compatible computing
controller or computer for automatic systems
The Distortion Analyzer is compatible with HP-IB applications.
to the extent indicated by the following code: SH1, 1-20. Front-to-Rear-Panel Connectors
AH1, T5, TEO, L3, LEO, SR1, RL1, PPO, DC1, Retrofit Kit
DT1, CO, E l . The Distortion Analyzer interfaces
with the bus via open collector TTL circuitry. An This kit contains all the necessary components and
explanation of the compatibility code can be found full instructions for converting instruments with
in IEEE Standard 488, "IEEE Standard Digital front-panel connections for INPUT and MONITOR
Interface for Programmable Instrumentation" or the to rear-panel connections. Order HP part number
identical ANSI Standard MC1.l. For more detailed 08903-60177. After installation and calibration, per-
information relating to programmable control of formance will be identical to the H P 89033 Option 001.
1-4
Model 89033 General Information
SPARE INTERNAL FUSES BNC TO BANANA PLUG ADAPTER
OPTION 909 OPTION 907
RACK FLANGE AND FRONT FRONT HANDLE KIT
HANDLE COMBINATION KIT
OPTION 908
RACK FLANGE KIT
NOTE: Refer to ACCESSORIES SUPPLIED, for more details.
Figure 1-2. HP Model 8903E Accessories Supplied, and Options 907, 908, and 909
1-5
General Information Model 89033
1-21. Rear-to-Front-Panel Connectors 1-25. RECOMMENDED TEST EQUIPMENT
Retrofit Kit
Table 1-3 lists the test equipment recommended for
This kit contains all the necessary components and use in testing, adjusting, and servicing the Distortion
full instructions for converting instruments with rear- Analyzer. If any of the recommended equipment is
panel connections for INPUT and MONITOR to unavailable, instruments with equivalent minimum
front-panel connections. Order HP part number 08903- specifications may be substituted. Table 1-3 also in-
60178. After installation and calibration, performance cludes some alternate equipment listings.
will be identical to the standard HP89033. 1-26. PRINCIPLES OF OPERATION FOR
SIMPLIFIED BLOCK DIAGRAM
1-22. MECHANICAL EQUIPMENT
The H P Model 89033 Distortion Analyzer combines
AVAILABLE
two instruments into one: a general purpose voltmeter
1-23. Chassis Slide Mount Kit with a tunable notch filter a t the input, and a
frequency counter. Measurements are managed by a
This kit is extremely useful when the Distortion microprocessor-based Controller. This combination
Analyzer is rack mounted. Access to internal circuits forms an instrument that can make most common
and components or the rear-panel is possible without measurements on audio circuits automatically. To
removing the instrument from the rack. Order H P add to its versatility, the Distortion Analyzer also
has selectable input filters, and H P - I B
part number 1494-0060 for 431.8mm (17in.) fixed
programmability.
slides, and part number 1494-0061 for the correct
adapters for non-HP rack enclosures. The operation of the instrument is described in the
following order: Voltmeter and Notch Filter, Counter,
1-24. Chassis Tilt Slide Mount Kit and Controller. Refer to Figure 1-3.
This kit is the same as the Chassis Slide Mount Kit
1-27. Voltmeter and Notch Filter
above except it also allows the tilting of the instru- The amplitude measurement path flows from the
ment up or down 90". Order H P part number 1494- INPUT connector to the MONITOR output (on the
0062 for 431.8mm (17 in.) tilting slides, and part front panel) and includes the Input and Output RMS/
number 1494-0061 for the correct adapters for non- Average Detectors, dc voltmeter (the Voltage-to-Time
H P rack enclosures. Converter and Counter). Measurements are made on
If
-
- 41
1- 0 oonm D .
KEYBOARD AND DISPLAY
Figure 1-3. Simplified HP 8903E Distortion Analyzer Block Diagram
1-6
Model 89033 General Information
the difference between the signals on the inner When measuring SINAD, distortion, or distortion
conductor and shield of the INPUT connector or, level, the fundamental of the signal is removed by
for option 001, the HIGH and LOW connectors. Com- the Notch Filter. The output from the filter is the
bined differential and common-mode levels can be as distortion and noise of the signal. In the ac level
high as 300V. However, for safety purposes only 42V mode, the Notch Filter is bypassed. After amplifying
maximum is allowed on the outer conductor of the and low-pass filtering, the output from the Notch
single BNC input connector when in the FLOAT