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Agilent Technologres. Inc www agilent corn
24001 E Mission
Liberty take, WA 99019
.':A:..
* .
. AgiIent Technologies
.
.*.e.*
:: . Innovatingthe HP Way
June 8,2000
08903-90062 Volume 1
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 .anilent.com.
Sincerely,
Rebranding Team
HP 8903B
AUDIO ANALYZER
(Including Option 001)
Service Manual
SERIAL NUMBERS
This manual applies directly t o instruments with
serial numbers prefked
24508 to 2948A and all MAJOR changes that apply to your instrument.
rev.20JUN91
For additional important information about serial
numbers, refer to "INSTRUMENTS COVERED BY
THIS MANUAL'' in Section 1.
Fifth Edition
This material may be reproduced by or for the US.
Government pursuant to the Copyright License un-
der the clause at DFARS 52.227-7013 (APR 1988).
CopyrightOHEWLETT-PACKARD COMPANY 1985
EAST 24001 MISSION AVENUE, TAF C34, SPOKANE, WASHINGTON, U.S.A. 99220
Service Manual (Volume 1,2) HP Part 08903-90062
Other Documents Available:
Operation and Calibration Manual (Volume 1) HP Part 08903-90079
Microfiche operation and Calibration and Service Manual HP Part 08903-90080 Printed in U.S.A. :July 1993
HEWLETT
PACKARD
1 Regulatory Information
(Updated March 1999)
1
Regulatory Information (Updated March 1999)
Safety Considerations
GENERAL
This product a n d related documentation must be reviewed for familiarization with safety
markings a n d instructions before operation.
This product h a s been designed and tested i n accordance w i t h IEC Publication 1010,
"Safety Requirements for Electronic Measuring Apparatus," a n d has been supplied in a
safe condition. This instruction documentation contains information a n d warnings which
must be followed by t h e user to ensure safe operation and t o m a i n t a i n t h e product i n a safe
condition.
SAFETY EARTH GROUND
A uninterruptible safety e a r t h ground must be provided from t h e m a i n 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 e a r t h (ground) terminal
A WARNING note denotes a hazard. It calls attention to a procedure,
~~ ~ ~ ~
WARNING
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 fully understood and met.
CAUTION A CAUTION note denotes a hazard. It calls attention to an operation
procedure, practice, or t h e like, which, if not correctly performed or adhered
to, could result i n damage to or destruction of p a r t or all of the product. Do
not proceed beyond a n CAUTION note until the indicated conditions a r e fully
understood a n d 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.
N o 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 ZEC 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 m a r k is a registered trademark of the European Community. A CE m a r k
accompanied by a year indicated the year the design was proven.
CSA - the CSA m a r k is a registered trademark of t h e Canadian S t a n d a r d s Association.
4 Chapter 1
REGIONAL SALES AND SERVICE OFFICES
SOUTH EAST EUROPE EASTERN USA
ASIA
Hewlett-Packard S.A. Hewlett-Packard Co.
Hewlett-Packard Asia Ltd. World Trade Center 4 Choke Cherry Road
47/F 26 Harbour Rd. 110 Avenue Louis-Casai ROCKVILLE, MD 20850
Wanchai, HONG KONG 1215 Cointrin, GENEVA, Tel: (301) 948-6370
G.P.O. Box 863 Hong Kong Switzerland
Tel: 5-8330833 Tel: (022) 98 96 51
Telex: 76793 HPA HX Telex: 27225 hpner MIDWESTERN USA
Cable: HPASIAL TD Mail Address:
Hewlett-Packard Co.
P.O. Box
5201 Tollview Drive
CH-1217 Meyrin 1
ROLLING MEADOWS,
CANADA GENEVA
IL 60008
Switzerland
Hewlett-Packard (Canada) Ltd. Tel: (312) 255-9800
6877 Goreway Drive
MISSISSAUGA, Ontario L4V 1M8
MIDDLEEASTANDCENTRAL
Tel: (416) 678-9430 SOUTHERNUSA
AFRICA
Telex: 069-8644
Hewlett-Packard Co.
Hewlett-Packard S.A.
2000 South Park Place
Middle East/Central
ATLANTA, GA 30339
EASTERN EUROPE Africa Sales H.Q.
Tel: (404) 955-1500
7, rue du Bois-du-Lan
Hewlett Packard Ges. m.b.h.
P.O. Box 364
Liebigasse 1
CH-1217 Meyrin 1
P.O. Box 72 WESTERN USA
GENEVA
A-1222 VIENNA, Austria
Switzerland Hewlett-Packard Co.
Tel: (222) 2500-0
Tel: (022) 83 12 12 5161 Lankershim Blvd.
Telex: 1 3 4425 HEPA A
Telex: 27835 hmea ch NORTH HOLLYWOOD,
Telefax: (022).83 15 35 CA 91601
Tel: (818) 505-5600
NORTHERNEUROPE
Hewlett-Packard S.A. UNITED KINGDOM
V.D. Hooplaan 241 OTHER
Hewlett Packard Ltd.
P.O. Box 999 INTERNATIONAL
Nine Mile Ride
NL-118 LN 15 AMSTELVEEN AREAS
WOKINGHAM
The Netherlands
Berkshire, RGll3LL Hewlett-Packard Co.
Tel: 20 5479999
Tel: 0344 773100 Intercontinental
Telex: 18919 hpser
Telex: 84880518488141848912 Headquarters
3495 Deer Creek Road
PAL0 ALTO, CA 94304
UNITED STATES OF Tel: (415) 857-1501
AMERICA Telex: 034-8300
Cable: HEWPACK
Customer Information
Center
Tel: (800) 752-0900
6O AM to 5:OO PM
:O
Pacific Time
SAFETY CONSIDERATIONS
GENERAL
This product and related documentation must be
[WARNING I
reviewed for familiarization with safety markings and
instructions before operation. A n y interruption of the protective (grounding)
conductor (inside or outside the instrument) or
This product is a Safety Class I instrument (provided disconnecting the protective earth terminal will
with a protective earth terminal). cause a potential shock hazard that could result-
ing personal injury. (Grounding one conductor of
BEFORE APPLYING POWER a two conductor outlet is not sufficientprotection).
Verify that the product is set to match the available
line voltage and the correct fuse is installed. Whenever it i likely that the protection has been
s
impaired, the instrument must be made inop-
SAFETY EARTH GROUND erative and be secured against any unintended
An uninterruptible safety earth ground must be pro- operation.
vided from the main power source to the product input
wiring terminals, power cord, or supplied power cord If this instrument is to be energized via an
set. autotransformer (for voltage reduction) make sure
the common terminal i connected to the earth
s
SAFETY SYMBOLS terminal of the power source.
/i\ Instruction manual symbol: the product will be
marked with this symbol when it is necessary for the
Servicing instructions are for use by service
trained personnel only. To avoid dangerous elec-
user to refer to the instruction manual (refer to Table tric shock, do not perform any servicing unless
of Contents.) qualified to do so.
Adjustments described i n the manual are per-
f Indicates hazardous voltages. formed with power supplied to the instrument
while protective covers are removed. Energy avail-
L Indicates earth (ground) terminal. able at may points may, if contacted, result i n
personal injuv.
I The WARNING sign denotes hazard.
IIt calls attention to a procedure, practice, ora the like, Capacitors inside the instrument may still be
charged even if the instrument has been discon-
nected from its source os supply.
which, if not correctly performed or adhered to, could
result in personal injury. Do not proceed beyond a For continued protection against fire hazard, re-
WARNING sign until the indicated conditions are fully place the line fuse(s) only with 250V fuse(s) of
understood and met. the same current rating and type (for example,
normal blow, time delay, etc.) Do not use repaired
CAUTION The CAUTION sign denotes a hazard. It fuses or short circuited fuseholders.
-
calls attention to an operating 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 a CAUTION
sign until the indicated conditions are fully understood
and met.
ATTENTION
Static Sensitive
Devices
This instrument was constructed in an E S D (electro-static discharge)
protected environment. This is because most of the semi-conductor
devices used in this instrument are susceptible to damage by static
discharge.
Depending o n 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 contact,
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 damage
or destruction.
Only those who are thoroughly familiar with industry accepted tech-
niques 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.
Model 8903B Replaceable Parts
Section 6
REPLACEABLE PARTS
6-1. INTRODUCTION NOTE
This section contains information for ordering parts. The total quantity for each part is given
Table 6-1 lists reference designations, and Table 6-2 only once, that is, at the first occurrence
lists abbreviations used in the parts list and through- of the part number in the list. The total
out the manual. Table 6-3 lists all replaceable parts quantities for optional assemblies are to-
in reference designator order. Table 6-4 contains the talled by assembly and not integrated into
names and addresses that correspond to the manufac- the standard list.
turer's code numbers.
6-4. FACTORY SELECTED PARTS (*)
6-2. ABBREVIATIONS
Parts marked with an asterisk (*) are factory selected
Table 6-2 lists abbreviations used in the parts list, parts. The value listed in the parts list is the nominal
schematics, and throughout the manual. In some value. Refer to Sections 5 and 8 of this manual for
cases, two forms of the abbreviation are used, one information on determining what value to use for
all in capital letters, and one partial or no capitals. replacement.
This occurs because the abbreviations in the parts
list are always all capitals. However, in the schematics 6-5. PARTS LIST UPDATING
and other parts of the manual, other abbreviation (MANUAL UPDATES)
forms are used with both lower case and upper case
letters. Production changes to the Audio Analyzer made after
the publication date of this manual are accompanied
6-3. REPLACEABLE PARTS LIST by a change in the serial number prefix. Changes to
the parts list are recorded by serial number prefix
Table 6-3 is the list of replaceable parts and is organ- on an addition or replacement page(s). The MANUAL
ized as follows: UPDATE pages can be ordered by filling out and
returning t h e DOCUMENTATION UPDATE
a. Electrical assemblies and their components in SERVICE REQUEST reply card found in the begin-
alphanumeric order by reference designation. ning of this service manual.
b. Chassis-mounted parts in alphanumeric order by 6-6. ILLUSTRATED PARTS BREAKDOWNS
reference designation.
Most mechanical parts are identified in Figure 6-1
c. Mechanical parts. through 6-5. These figures are located at the end of
the replaceable parts table.
The information given for each part consists of the
following: 6-7. ORDERING INFORMATION
a. The Hewlett-Packard part number. To order a part listed in the replaceable parts table,
b. Part number check digit (CD). include the Hewlett-Packard part number (with the
check digit) and the quantity required. Address the
c. The total quantity (Qty) for the entire instrument order to the nearest Hewlett-Packard office. The
except for option assemblies. (See following note.) check digit will ensure accurate and timely processing
of your order.
d. The description of the part.
To order a part that is not listed in the replaceable
e. A typical manufacturer of the part in a five-digit parts table, include the instrument model number,
code. instrument serial number, description and function
of the part, and the quantity of parts required. Address
f. The manufacturer's number for the part. the order to the nearest Hewlett-Packard office.
6-1
Replaceable Parts Model 8903B
NOTE data. Quantities given are for one year of parts sup-
Within the USA, it i better to order di-
s port. A complimentary copy of the "Recommended
rectly from the HP Parts Center in Moun- Spares" list may be requested from your nearest
tain View, California. Ask your nearest Hewlett-Packard office.
HP office for information and forms for
the "Direct Mail Order System". When stocking parts to support more than one Audio
Analyzer or to support a variety of Hewlett-Packard
6-8. RECOMMENDED SPARES LIST instruments, it may be more economical to work from
one consolidated list rather than simply adding to-
Stocking spare parts for an instrument is often done gether stocking quantities from the individual instru-
to ensure quick return to service after a malfunction ment lists. Hewlett-Packard will prepare consolidated
occurs. Hewlett-Packard has prepared a "Recom- "Recommended Spares" lists for any number or com-
mended Spares" list for this instrument. The contents bination of instruments. Contact your nearest
of the list are based on failure reports and repair Hewlett-Packard office for details.
6-2
Model 8903B Replaceable Parts
Table 6-1. Reference Designations
REFERENCE DESIGNATIONS
A . . . . . . . . . . . . . . . .assembly E . . . . . . . . . . . . miscellaneous P ....... electrical connector U . . . . . . . . . integrated circuit;
AT . . . . . . attenuator; isolator; electrical p a r t (movable portion): microcircuit
termination F .................... fuse P M V . . . . . . . . . . . . electron tube
B . . . . . . . . . . . . . . . fan; m o t o r FL . . . . . . . . . . . . . . . . . . . filter 0 .......... transistor; SCR; VR . . . . . . . . voltage regulator;
BT ................. battery H . . . . . . . . . . . . . . . . hardware triode thyristor; FET b r e a k d o w n diode
C . . . . . . . . . . . . . . . . capacitor HY ............... circulator R ................. resistor W ....... cable; transmission
CP . . . . . . . . . . . . . . . .coupler J ....... electrical connector RT .............. thermistor path; wire
CR . . . . . . . . . . . . diode; diode (stationary portion); S .................. switch X .................. socket
thyristor; varactor jack T .............. transformer Y . . . . . . . . crystal unit (piezo-
DC ....... directional coupler K ................... relay T B . . . . . . . . . . terminal b o a r d electric or quartz)
DL .............. delay line L............. coil; inductor TC ........... thermocouple 2 . . . . . . . tuned cavity; tuned
DS ............ annunciator; M .................. meter TP .............. test point circuit
signaling device MP . . . . . . . . . . miscellaneous
(audible or visual); mechanical part
lamp: LED
Table 6-2. Abbreviations (1 of 2)
ABBREVIATIONS
A . . . . . . . . . . . . . . . . .a m p e r e COEF . . . . . . . . . . . coefficient EDP ......... electronic data INT ................ internal
. . . alternating current COM , . ~ ......... common
. processing kg ................ kilogram
......... accessory COMP ......... composition ELECT .......... electrolytic kHz . . . . . . . . . . . . . . kilohertz
ADJ ............ adjustment COMPL ........... complete ENCAP ........ encapsulated k .................. kilohm
AID ........ analog-to-digital CONN ........... connector EXT ............... external
CP .......... cadmium plate F ................... farad
CRT ....... cathode-ray tube FET .... field-effect transistor
CTL ......... complementary F/F ................ flip-flop
transistor logic FH ............... flat head LED . . . . . light-emitting diode
control CW ........ continuous wave FIL H .......... fillister h e a d LF ........... low frequency
AL . . . . . . . . . . . . . . aluminum cw .............. clockwise FM . . . . frequency modulation LG . . . . . . . . . . . . . . . . . . . long
ALC . . . . . . . . . automatic
level ..... centimeter FP ............. front panel
control FREQ ............ frequency
AM .... amplitude modulation FXD ................. fixed LIN ....... linear taper (used
AMPL ............. amplifier g ................... g r a m i n parts list)
APC ....... automatic p h a s e GE ............ . g e r m a n i u m LK WASH ......
lock washer
control dc ........... direct current GHz ............. gigahertz LO ......
low; local oscillator
ASSY ............ assembly deg . . . . . degree (temperature GL .................. glass LOG .......
logarithmic taper
interval or difference) GRD . . . . . . . . . . . . ground(ed) (used in parts list)
avg . . . . . . . . . . . . . . . average ...' . . . . . . . . . . . degree (plane ............... henry log logarithm(ic)
... A m e r i c a n wire angle) h .................... hour LPF .........
l o w pass filter
OC .......... d e g r e e Celsius HET ............h e t e r o d y n e LV ............. l o w voltage
(centigrade) HEX . . . . . . . . . . . . . h e x a g o n a l m ..........
meter (distance)
OF ........ d e g r e e Fahrenheit H D .................. h e a d
decimal OK ........... degree Kelvin HDW . . . . . . . . . . . . . hardware
BD . . . . . . . . . . . . . . . . . board DEPC ..... deposited carbon HF .......... high frequency
BECU . . . . . . beryllium c o p p e r ......... detector HG ............... m e r c u r y
BFO . . . . . . . . beat f r e q u e n c y ........ diameter HI ................... h g h i n parts list)
oscillator HP ......... Hewlett-Packard MET F L M . . . . . . . . metal film
BH binder h e a d parts list) HPF . . . . . . . . high p a s s filter MET OX . . . . . . metallic oxide
BKDN . . . . . . . . . . breakdown DlFF AMPL ...... differential HR ........... h o u r (used i n MF . . . . . . medium frequency:
B P . . . . . . . . . . . . . .b a n d p a s s amplifier parts list) microfarad (used in
B P F . . . . . . . . . b a n d p a s s filter div ................ division HV ............ high voltage parts list)
B R S . . . . . . . . . . . . . . . . brass D P D T . . . . . . . . . . double-pole, Hz .................. Hertz
double-throw IC . . . . . . . . . integrated circuit
ID .......... inside diameter MHz ............ megahertz
C A L . . . . . . . . . . . . . . calibrate DSB . . . . . . . double sideband IF ............. intermediate
ccw . . . . . . . counter-clockwise DTL ........ diode transistor frequency ........ m h o
CER ..... ceramic logic IMPG .......... i m p r e g n a t e d
CHAN . . . . channel DVM . . . . . . . digital voltmeter in ............ incandescent
cm . . . . . . . . . . . . . . centimeter ECL . . . . . . . . emitter coupled
CMO .... cabinet m o u n t only logic INP .................. input
EMF . . . . . electromotive force INS . . . . . . . . . . . . . . insulation
NOTE
All abbreviations in the p a r t s list will be in upper-case.
Replaceable Parts Model 8903B
Table 6-2. Abbreviations (2 of 2)
MOD ............ m o d u l a t o r OD ........outside diameter PWV ......... p e a k working
MOM . . . . . . . . . . . momentary OH .............. oval h e a d voltage
OP A M P L .......
operational RC . . . . . . . . . . . . . resistance- TFT ...... thin-film transistor
amplifier capacitance TGL . . . . . . . . . . . . . . . . toggle
m s . . . . . . . . . . . . . millisecond OPT ................ option RECT . . . . . . . . . . . . . . rectifier
MTG ............. mounting REF .............reference
MTR ....... meter (indicating REG ............. regulated
device) oz .................. ounce REPL .......... replaceable TOL ............. tolerance
mV ................ millivolt R .................... ohm RF ......... radio frequency
P ....... p e a k (used in p a r t s RFI ......... radio frequency TSTR . . . . . . . . . . . . transistor
mVdc . . . . . . . . . . . millivolt,
dc list) interference
mVpk ......... millivolt, p e a k PAM ........ pulse-amplitude R H . . . round head; right hand
modulation RLC ............ resistance- TV . . . . . . . . . . . . . . . television
PC ........... printed circuit inductance- TVI .... television interference
PCM . . . . pulse-code m o d u l a - capacitance . . . traveling wave tube
tion; pulse-count RMO ....... rack m o u n t only ... micro (used
modulation rms ....... root-mean-square i n p a r t s list)
PDM ......... pulse-duration RND ................ round UF . . . . . . microfarad (used in
modulation ROM ..... read-only m e m o r y p a r t s list)
PF . . . . . . . . . . . . . . microfarad pF ............... picofarad R&P ........ rack and panel UHF ..... ultrahigh frequency
PH BRZ ... phosphor bronze RWV ....... reverse working UNDEF . . . . . . . . . . undefined
pmho . . . . . . . . . . . . micromho PHL ............... Phillips voltage
PIN ........ positive-intrinsic- S . . . . . . scattering parameter
negative s ............ s e c o n d (time)
WVac . . . . . . . . . . microvolt, a c PIV . . . . p e a k inverse voltage ..... second (plane angle)
S-B
...I
pVdc . . . . . . . . . . microvolt, dc ........ Slow-blow (fuse)
pVpk . . . . . . . . microvolt, p e a k (used i n parts list)
wVp-p . . . . . . microvolt, peak- SCR ....... silicon controlled
to-peak PM . . . . . . . phase modulation rectifier; s c r e w
pVrms ....... microvolt, r m s PNP ...... positive-negative- SE ............... selenium VDCW .... volts, dc, working
pW . . . . . . . . . . . . . . microwatt positive SECT ............. sections (used i n p a r t s list)
nA ............ nanoampere P/O . . . . . . . . . . . . . . . . part of SEMICON .... semiconductor V(F) ........... volts, filtered
n o connection POLY .......... polystyrene SHF .... superhigh frequency VFO . . . . . . variable-frequency
SI .................. silicon oscillator
NE .................. neon SIL.. ................ silver VHF . . . . . very-high frequency
(used in p a r t s list) SL.. ................. slide
POSN ............. position SNR .... signal-to-noise ratio
POT .......... potentiometer SPDT .......... single-pole,
p-p ........... peak-to-peak double-throw VSWR ...... voltage standing
NOM ........... PP ...... peak-to-peak (used SPG ................ spring wave ratio
in parts list) SR ............... split ring VTO . . . . . . . . . . . voltage-tune
NPN ...... negative-positive- SPST .......... single-pole, oscillator
negative modulation single-throw VrVM ......... vacuum-tube
NPO ....... negative-positive PREAMPL ......
preamplifier SS ........... Service Sheet voltmeter
zero (zero tempera- PRF ........ pulssrepetitin SSB ........ single sideband V(X)......... volts, switched
ture coefficient) frequency SST ......... stainless steel w ....... . . . . . wan
NRFR .... not recommended PRR . . . . pulse repetition rate STL ................. steel W/ ................... with
for field replacement SO ................ square WIV ........ w o r k i n g inverse
NSR ......... not separately SWR .... standing-wave ratio voltage
SYNC .......... synchronize WW ............ wirewound
.... n a n o s e c o n d modulation T ..... timed (slow-blow fuse) W/O ............... without
nW . . . . . . . . . . . . . . nanowatt TA ............. ..tantalum YIG ...... yttrium-iron-garnet
modulation TC ............ temperature 2, ........... characteristic
compensating impedance
NOTE
All abbreviations in the parts list will be in u p p e r c a s e .
MULTIPLIERS
Abbreviation Prefix Multiple
T tera 10'2
G gigs 109
M mega 106
k kilo 103
da deka 10
d deci 10-1
C centi 10-2
m milli 10-3
P micro 10-6
n nano 10-9
P pic0 10-12
f femto 10-15
a ano 10-18
6-4
Model 8903B
n b l e 6-3.RtplaccaDIc Ports
Reference
Designation Number
Part : atY.
Description Mfr.
Code
Mfr. Part Number
A1
BlSO,\ 7 ' 0 2i.W;l
A1 08W3W165 9 1 KEYBOARD AND DISPLAY ASSEMBLY 28080 08903-6016G
2i2t.l ,.IN/> Allf>\'/~;
A1 0890360193 2 1 KEYBOARD AND DISPLAY ASSEMBLY 28480 08903-60lY3
AlCl 0180 0229 7 1 CAPACITORTXD 33UF+.lO% IOVDC TA 56289 i500336x9oioez
AlC2 0163 2055 9 4 CAPACITORFXD OlUF +00-20% lOOVOC CER 28480 0100.2059
A1C3 0160 2291 5 1 CAPACITORFXD l8UF i - l O % 8OVDC POLYE 28480 01CO.2291
AlW 01602055 9 CAPACITOR-FXD OlUF +8020% lOOVDC CER 284e0 0160.2055
ClC5 01602055 9 CAPACITORFXD .OlUF +80-20