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At Agilent Technologies, we are working diligently to make this transition as smooth as possible for
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6LQFHUHO\
5HEUDQGLQJ7HDP
HP
8901B
MODULATION
Service
SERIAL
This
manual provides complete information for in-
2314A
struments
to
2914A
For
numbers, refer
THIS
This
Government pursuant
der the clause at DFARS
with
serial-number prefixes:
and all
additional important information about serial
MANUAL"
material may be reproduced by
MAJOR
rev.
to
"INSTRUMENTS
in Section
Fourth Edition
ANALYZER
Manual
NUMBERS
changes that
12NOV92
1.
to
the Copyright License
52.227-7013
occur
COVERED
or
for the
(APR
to
your
1988).
instrument.
BY
US.
un-
Copyright@ H EWLETT-PACKARD COMPANY 1 987
EAST 24001 MISSION AVENUE, TAF C-34, SPOKANE, WASHINGTON, U.S.A. 99220
Service Manual (Volume 1, 2,
Other Documents Available:
Operation and Calibration Manual HP Part 08901-901
Basic Operation and Application Guide 08901-901
Microfiche Operation and Calibration Manual HP Part 08901-901 15
Microfiche Service Manual
3)
HP Part 08901-901 14
13
17
HP
Part 08901-901 16 Printed in USA. : April 1995
Pia
HEWLETT
PACKARD
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
markings and instructions before operation.
This product
"Safety Requirements for Electronic Measuring Apparatus," and
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
condition.
SAFETY
A uninterruptible safety earth ground
product input wiring terminals, power cord, or supplied power cord set.
SAFETY
A
Indicates instrument damage can occur if indicated operating limits are exceeded.
note denotes a hazard. It calls attention to a procedure,
with
practice, or the like, which, if not correctly performed or adhered to,
could result in personal injury.
sign until the indicated conditions are
Do
not proceed beyond a
fully
understood and met.
WARNING
safety
1010,
in
in
a
a
safe
CAUTION
A CAUTION note denotes a hazard.
procedure, practice, or the like, which, if not correctly performed or adhered
to, could result in damage to or destruction of part or
not proceed beyond
understood and met.
an
CAUTION note
It
calls attention to
until
the indicated conditions
an
operation
all
of the product.
are
Do
fully
2
Chapter
1
Safety Considerations for this Instrument
Regulatory
Information
(Updated
March
1999)
WARNING
This product is a Safety Class I instrument (provided with a
protective earthing ground incorporated in the power cord). The
a
mains plug shall only be inserted in
protective earth contact.
conductor inside
instrument must be made inoperative and be secured against any
unintended operat ion.
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
No
operator serviceable parts in this product. Refer servicing
all
means for protection are intact) only.
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.
a
The opening of covers or removal of parts
dangerous voltages. Disconnect the product from
is
likely to expose
all
voltage sources
while it is being opened.
The power cord is connected to internal capacitors that
live for
5
seconds after disconnecting the plug from its power supply.
my
remain
For Continued protection against fire hazard, replace the line fuse(s)
only with
example, normal blow
250
V
fuse(s) or the same current rating and type (for
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
Pollution Degree
INDOOR
USE
is
designed
2
ONLY.
per
for
ZEC
use in Installation Category
1010
and
ZEC
664
respectively. FOR
I1
and
This product has autoranging line voltage input, be sure the supply
voltage
is
within the specified range.
Chapter
1
3
Regulatory Information (Updated March
To
prevent electrical shock, disconnect instrument
before cleaning. Use a dry cloth or one slightly dampened with water
to
clean the external case parts.
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
watts dissipated in the cabinet.
cabinet is greater than
used.
1999)
from
Do
not attempt
If
the total power dissipated in the
800
watts, then forced convection must be
to
clean internally.
4"
C
for
mains (line)
every
100
Product
CE - the CE mark
Markings
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
Model
8901B
Service
SAFETY CONSIDERATIONS
GENERAL
This product and related documentation must be reviewed for familiarization with safety markings and
instructions before operation.
This product is a Safety Class I instrument (provided
with a protective earth terminal).
BEFORE APPLYING
Verify that the product is set to match the available
line voltage and the correct fuse is installed.
POWER
SAFETY EARTH GROUND
An uninterruptible safety earth ground must be provided from the main power source to the product input
or
wiring terminals, power cord,
set.
supplied power cord
SAFETY SYMBOLS
Instruction manual symbol: the product will
A
is
manual (refer to Table of Contents).
be marked with this symbol when it
necessary for the user
Indicates hazardous voltages.
to
refer to the instruction
I
WARNING
Any interruption of the protective (ground-
ing) conductor (inside
or
ment)
terminal will cause a potential shock hazard
that
ing one conductor of a two conductor outlet
is not sufficient protection).
Whenever it
been impaired, the instrument must be made
inoperative and be secured against any unin-
tended operation.
If this instrument
autotransformer (for voltage reduction) make
sure the common terminal is connected to the
earth terminal of the power source.
Servicing instructions are for use by servicetrained personnel only.
electric shock,
unless qualified to do
disconnecting the protective earth
could result
is
likely that the protection has
do
or
outside the instru-
in
personal injury. (Ground-
is
to be energized via an
To
avoid dangerous
not perform any servicing
so.
Indicates earth (ground) terminal.
The WARNING sign denotes a
hazard. It calls attention to a
or
procedure, practice,
or
performed
Do
jury.
the indicated conditions are fully understood and met.
operating procedure, practice,
correctly performed
to
age
or
not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met.
adhered to, could result in personal in-
not proceed beyond a WARNING sign until
destruction of part
the like, which,
The CAUTION sign denotes a haz-
It
ard.
or
calls attention to an
or
adhered to, could result in dam-
or
all of the product.
if
not correctly
the like, which,
if
not
Do
Adjustments described
formed with power supplied to the instrument
while protective covers are removed. Energy
available at many points may,
sult
in
personal injury.
Capacitors inside the instrument may still be
charged even if the instrument has been disconnected from its source of supply.
For
continued protection against fire hazard,
replace the line fuse(s) only with
of the same current rating and type (for exam-
ple, normal blow, time delay, etc.).
repaired fuses
fuseholders.
in
the manual are per-
if
contacted, re-
250V
Do
or
short circuited
fuse(s)
not use
ATTENTION
Static Sensitive
Devices
This instrument was constructed
protected environment. This
devices used
discharge.
Depending on the magnitude of
punctured
The results can cause degradation of device performance, early failure,
or
immediate destruction.
These charges are generated
separation of materials, and normal motions of persons working with
static sensitive devices.
When handling
devices, adequate precautions
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.
In
all instances, measures
build-up on work surfaces and persons handling the devices.
in
this instrument are susceptible to damage
or
destroyed
by
contact
or
servicing equipment containing static sensitive
in
an ESD (electro-static discharge)
is
because most of the semi-conductor
by
the
charge, device substrates can be
or
mere proximity of a static charge.
in
numerous ways such
must
be taken to prevent device damage
must
be taken to prevent static charge
as
simple contact,
static
Model 8901B
Volume 1 Table of Contents
VOLUME
Introduction
Reference Designators and Abbreviations
Replaceable
OrderingParts
Replaceable
Mechanical and Chassis
Recommended Spares List
Introduction
Firmware Change
Introduction
How
This
Safety Considerations
Before Applying Power
Safety
Service
Service Accessory Kit
Heat-Staking
Assembly Locations
Parts
Other Service Documents
Recommended Test Equipment
General Troubleshooting
Operator Errors
Operation Out
Catastrophic Failures
Schematic Symbology and Schematic Diagram Notes
Special Functions
Service Sheet BD1-Overall Block Diagram
Service Sheet BD2-RF Block Diagram
Service Sheet BD3-IF Block Diagram
Service Sheet BD4-Audio Block Diagram
Service Sheet BD5-Digital
Block Diagram Foldouts
and
Power Supply Block Diagram
............................................
....................................
....................................
.................................
..................................
.......................
8D-1
8D-15
8D-25
8D-37
8D-47
.8
E.l
rev.08JUL91
Model
8901B
Replaceable
Parts
Section
6
REPLACEABLE PARTS
6-1.
INTRODUCTION TO THIS SECTION
This section contains information
6-2
Table
parts in the instrument. Table
manufacturer’s code numbers listed in Table
drawings
6-2.
REFERENCE DESIGNATIONS AND ABBREVIATIONS USED IN THIS MANUAL
Table
designations found in Table
designation for each part in the instrument.
particular resistor
Table
6-3.
REPLACEABLE PARTS LIST
lists abbreviations that are used in the Replaceable Parts List. Table
to
aid in identifying and ordering chassis mounted parts and mechanical parts.
6-1
lists the reference designation letters for electrical parts in the instrument. The letter
6-1
R1
on assembly A17.
6-2
lists abbreviations used in the parts list and on schematics.
for
ordering parts. Table
6-4
contains the names and addresses that correspond
6-3.
Also included in this section are photographs and
are coupled with numeric designations to provide a unique reference
For
example A17R1 is the reference designation
6-1
lists reference designations, and
6-3
lists all replaceable
to
the
of
a
Table
6-3
is
a list of replaceable parts and is organized
a.
Electrical assemblies and their components with reference designations in alphanumeric order.
b. Chassis-Mounted parts with reference designations in alphanumeric order.
c. Mechanical parts with reference designations in alphanumeric order.
For your convenience, the Replaceable Parts List
6
removed from Section
Ordering
Parts.
instrument Serial Numbers.
Attached to the rear of the instrument
are the instrument serial-number prefix. The last five digits (serial-number suffix) are unique to each
instrument. When parts in the instrument are changed, the serial-number prefix of the instrument may
also
change. This means that sometimes a part will be listed more than once in the the replaceable
parts list along with a serial-number prefix
prefix on the serial plate of your instrument and order the part listed under the corresponding prefix
in the table. If no serial prefix information is listed, the part is compatible
numbers.
It is possible that some assemblies in your instrument have been updated
(through service
serial-number prefixes later than that shown on your instrument serialnumber tag. Be sure to note the board number
or
replaced when ordering parts
and collated into Section 8 with
is
a serial-number plate. The first four digits and the letter
or
range of serial-number prefixes. Find the serial-number
NOTE
or
retrofitting) to reflect changes made to instruments with
for
as
follows:
is
paginated so that each assembly listing can be
its
corresponding service information.
in
instruments of all serial
of
the assembly being repaired
your instrument.
6-
1
Replaceable Parts Model 8901B
How
to
Order
To order a part in the Replaceable Parts
List,
call
or
write the nearest Hewlett-Packard Sales Office.
Have the following information ready to speed the ordering process:
1.
The Hewlett-Packard part number with the check digit. (The check digit will ensure accurate and
timely processing of your order.)
2.
The quantity required.
3. An approved purchase order number. (Sometimes required.)
NOTE
Within
Mountain View California.
the
USA,
it
is
better to order directly from the HP Parts Center
Ask
your nearest HP ofice for information and
in
forms for the “Direct Order System”.
Replaceable Parts List Updating (Manual Updates)
A
“MANUAL UPDATES” packet is shipped with the manual, when necessary, to provide the most
current information available at the time of shipment. These packets consist of replacement and
addition pages which should be incorporated into the manual
Hewlett-Packard offers a Documentation Update Service that will provide you with further updates
If
as they become available.
you operate
recommend that you join this service immediately
or
service instruments of different serial prefixes, we strongly
to
ensure that you manual
information, refer to the Documentation Update Service reply card included in this manal,
Technical Writing Department (509) 922-4001,
to
bring
it
up
to
is
date.
kept current.
For
or
more
call:
6-4.
6-5.
or
write:
Hewlett-Packard Company
Technical Writing Department
-
24001 E. Mission
TAF C-34
Spokane, WA 99220
MECHANICAL AND CHASSIS PART LOCATIONS AND REFERENCE DESIGNATIONS
Most mechanical parts are identified in Figures 6-1 to 6-9. These figures are located at the end of
this section. Major mechanical parts have reference designations that begin with the letters MP. To
find the part number and description of a mechanical part, find the part in one of the photographs
or
drawings, and then look up the reference designation in Table 6-3. Mechanical hardware, such as
For
screws, are listed under the part which they attach.
to the rear panel are listed under
B1.
example, the screws that attach the fan (Bl)
RECOMMENDED SPARES LIST
Stocking spare parts for an instrument is often done
occurs. Hewlett-Packard has prepared a “Recommended Spares” list for this instrument. The contents
list
of the
are based on failure reports and repair data. Quantities given are for one year of parts
support. You can request a complimentary copy of the “Recommended Spares” list from your nearest
Hewlett-Packard office.
When stocking parts to support more than one instrument
instruments,
adding together stocking quantities
it
may be more economical to work from one consolidated list rather than simply
from
the individual instrument lists. Hewlett-Packard will prepare
consolidated “Recommended Spares” lists for any number
nearest Hewlett-Packard office for details.
to
ensure quick return to service after a malfunction
or
to
support a variety
or
combination of instruments. Contact your
of
Hewlett-Packard
6-2
Model
8901B
Replaceable
Parts
A
AT
B ............... fan: motor
BT
................ capacitor
C
CP
CR
DC
DL
DS
ac
ACCESS
ADJ ............ adjustment
A/D ........ analog-to-digital
AF
AFC ............. automatic
AGC
AM
AMPL
APC
ASSY
AUX
avg
AWG
BAL
BCD
BD ................. board
BECU
BFO
BH ............ binder head
BKDN
BP
BPF
BRS
BWO ....... backware-wave
CAl
ccw
CER
CHAN
cm
CMO
COAX
........ assembly
...... attenuator; isolator;
.................
................
............
.......
...............
............
........
.........
.........
....
.............
.......
............ assembly
..............
...............
......... American wire
...............
termination
battery
coupler
thyristor: varactor
signaling device
(audible or visual);
lamp; LED
A
frequency control
control
control
control
gauge
diode; diode
directional coupler
delay line
annunciator:
..........
alternating current
.........
amplitude modulation
ampere
accessory
audio frequency
automatic gain
amplifier
automatic phase
auxiliary
average
balance
.......... binary coded
decimal
......
beryllium copper
.........
..............
.........
..............
....... counter-clockwise
.............. ceramic
..............
.....
beat frequency
oscillator
..........
oscillator
breakdown
bandpass
bandpass filter
...........
.............
centimeter
cabinet mount only
..............
brass
calibrate
channel
coaxial
Table
6-1.
Reference Designations
REFERENCE
E
............
....................
F
FL
...................
H
................ hardware
HY
...............
J
........
K
...................
L
.............
M
..................
..........
MP
miscellaneous
electrical part
electrical connector
(stationary portion):
jack
mechanical part
Table
circulator
relay
coil; inductor
meter
miscellaneous
6-2.
Abbreviations
fuse
filter
ABBREVIATIONS
CP
..........
.......
CRT
CTL
.........
........
CW
cw
..............
dB
.................
dBm
........
OF ........ degree Fahrenheit
OK
...........
DEPC
DET
..............
diam
..............
DIA
....... diameter (used in
DlFF AMPL ...... differential
.......
DSB
DTL
........
.......
DVM
ECL
........
.....
EMF
'cadmium plate
cathode-ray tube
complementary
transistor logic
continuous wave
clockwise
decibel
decibel referred
angle)
..... deposited carbon
degree Kelvin
detector
diameter
parts list)
amplifier
double-throw
double sideband
diode transistor
logic
digital voltmeter
emitter coupled
logic
electromotive force
DESIGNATIONS
P
.......
electrical connector
(movable portion);
Plug
Q
..........
R
.................
RT
.............. thermistor
S
.................. switch
T
..............
TB
..........
TC
...........
TP
...............
EDP
.........
ELECT
ENCAP ........ encapsulated
EXT
...............
................... farad
F
FET
....
FH
...............
FIL H
FM
....
FP
.............
g
...................
GE
.............
GHz
HEX
.............
HD
..................
HDW
HF
..........
HG
...............
HI
...................
HP
......... Hewlett-Packard
HPF
.........
HR
...........
HV ............ high voltage
Hz
..................
IC
.........
ID .......... inside diameter
IF
.............
in
............
INCL
INP
..................
INS
.............. insulation
transistor; SCR;
triode thyristor; FET
transformer
terminal board
thermocouple
(1
of
2)
electronic data
processing
..........
field-effect transistor
..........
frequency modulation
fillister head
.............
........
............. hardware
.............
high frequency
high pass filter
hour (used in
parts list)
integrated circuit
intermediate
incandescent
resistor
test point
electrolyhc
external
flat head
front panel
gram
germanium
gigahertz
hour
hexagonal
head
mercury
high
Hertz
include(s)
input
U
.........
.............
V
VR
........ voltage regulator;
W
.......
X
..................
Y
........ crystal
2
........
INT
................
kg
................
kHz
k
..................
LC
.............
LED
LF
...........
LIM
LIN
LK WASH ck washer
LO
LOG
log
LPF
LV
.............
m
..........
mA
.............
MET OX
MF
MFR
mg
...............
MHz
mH
mho
min
..........
MlNAT
mm
integrated circuit;
microcircuit
breakdown diode
path; wire
electric or quartz)
circuit
.............. kilohertz
capacitance
.....
..................
.......
in
......
.......
(used in parts list)
............
..........
......
..........
...
....
.................
...........
...........
.............. millimeter
electron tube
cable; transmission
socket
unit
(piezo-
tuned cavity; tuned
internal
kilogram
kilohm
.
. kilovolt
...
pound
inductance-
light-emitting diode
low frequency
linear taper (used
I
oscillator
logarithmic taper
logarithm(ic)
low pass filter
low
voltage
meter (distance)
milliampere
......
metallic oxide
medium frequency:
microfarad (used in
parts list)
manufacturer
milligram
megahertz
.
millihenry
minute (time)
minute (plane angle)
miniature
limit
mho
NOTE
All abbreviations in the parts list will be in upper-case.
6-3
Replaceable
Parts
Model
8901B
MOD
....
modulator
...........
MOS
semiconductor
.............
ms
MTG
.............
.......
MTR
mV
mVac
mVdc
mVpk
mVp-p
MUX
MY
pA
pF .............. microfarad
pH
pmho
ps
pV
pVac
pVdc
pVpk
pVpp ....... microvolt, peak-
NC
N/C
N/O
NOM
NORM
NPN ...... negative-positive-
NPO
NRFR ..... not recommended
NSR
ns
nW
OB0
device)
................
........... millivolt. ac
...........
.........
.......
to-peak
.............
.................
............ microampere
.............
............
............
............... microvolt
..........
..........
........
..........
........
..........
..............
.............
negative
.......
zero (zero tempera-
ture coefficient)
for field replacement
.........
replaceable
......
....
....
metal-oxide
millisecond
mounting
meter (indicating
millivolt
millivolt, dc
millivolt, peak
millivolt, peak-
.
.
millivolt, rms
multiplex
mylar
microhenry
micromho
microsecond
microvolt, ac
microvolt, dc
microvolt, peak
no connection
normally closed
normally open
nominal
normal
negative-positive
not separately
..
nanosecond
nanowatt
....
order by description
lbble
OD .. outside diameter
OH
..............
OP AMPL
amplifier
OPT
................
OSC
.............
ox
.........
list)
PAM
........
modulation
PC
...........
PCM
....
pulse-code modulation; pulse-count
modulation
PDM
.........
modulation
pF
...............
negative
PIV
.....
peak inverse voltage
...................
pk peak
PL
............. phase lock
PLO
....
phase lock oscillator
POLY .......... polystyrene
PORC
............ porcelain
used in parts list)
p-p
...........
PP
......
peak-to-peak (used
PREAMPL
frequency
PRR
....
ps ...
PT
PTM
PWM
pulse repetition rate
..................
............
modulation
...........
modulation
6-2.
.......
......
oval head
operational
pulse-amplitude
printed circuit
pulseduration
peak-to-peak
preamplifier
...
picosecond
pulse-time
pulse-width
Abbreviations
option
oscillator
picofarad
point
(2
of
2)
PWV
..........
..........
RECT..
RH
...
round head; right hand
.............
RLC
capacitance
RMO
.......
....... root-mean-square
rms
RND
................
ROM
.....
RBP
.........
RW
....... reverse working
S
...I
S-B
SCR
SE
SECT
SEMICON
SHF
SI
SIL..
SL
SNR
SPDT
SPG
SS
SSB
SQ
SWR
SYNC
T
TA
TC
voltage
......
.....
........
(used
.......
rectifier; screw
...............
.............
....
..................
................
...................
....
..........
double-throw
................
...........
........
..........
....
..........
..... timed (slow-blow fuse)
...............
............
compensating
peak working
voltage
capacitance
............
interference
inductance-
scattering parameter
second (plane angle)
superhigh frequency
signal-to-noise ratio
resistance-
resistance-
rack mount only
read-only memory
rack and panel
slow-blow (fuse)
in parts list)
silicon controlled
selenium
sections
.... semiconductor
single-pole,
Service Sheet
single sideband
standingwave ratio
synchronize
tantalum
temperature
rectifier
round
silicon
silver
slide
spring
TD
..............
TERM
.............
TFT
......
TGL
................ toggle
TI
.................
TOL
.............
TSTR
......
TV
TVI
TWT
logic
...............
....
television interference
.....
U
........
in parts list)
...
UHF
UNDEF .......... undefined
U
VA
Vac
VAR
VCO
V(F)
VFO
VHF
Vpk
Vpp
Vrms
VTO
VNM
V(X)
w
W/
WW
W/O
YIG
2,
parts list)
.....
N KEG
........
.............
...............
.............. .variable
......
oscillator
(used
...........
......
oscillator
.....
very-high frequency
............
.....
............
...........
oscillator
.........
voltmeter
.........
....................
...................
voltage
............
...............
......
...........
impedance
time delay
thin-film transistor
traveling wave
micro (used
microfarad (used in
ultrahigh frequency
voltage-controlled
variable-frequency
volts, peak-to-peak
yltrium-iron-garnet
terminal
titanium
tolerance
television
tube
unregulated
voltarnpere
volts, ac
in
parts list)
volts, filtered
volts, peak
volts, rms
voltage-tune
vacuum-tube
volts, switched
characteristic
wan
with
wirewound
without
6-4
NOTE
All
abbreviations in the parts list will be in upper-case.
MULTIPLIERS
Abbreviation
T
G
M
k
da
d
C
m
P
n
P
f
a
Prefix
tera
gigs
mega
kilo
deka
deci
centi
milli
micro
nano
pic0
femto
atto