Reference Designations And Abbreviations - HP 7475A Service Manual

Section IV
A ............................. assembly
AT ....................... attenuator;
isolator; termination
B .......................... fan; motor
BT .............................. battery
C ............................ capacitor
CP ............................. coupler
CR .............................. diode;
diode thyristor; varactor
DC .......... directional coupler
DL ......................... delay line
DS ..................... annunciator;
signaling device
(audible or visual);
lamp; LED
A ............................... ampere
ac ............. alternating current
ACCESS ................ accessory
ADJ .................... adjustment
A/D ............ analog-to-digital
AF ................ audio frequency
AFC ...................... automatic
frequency control
AGC .............. automatic gain
control
AL. ........................ aluminum
ALC .............. automatic level
control
AM ....................... amplitude
modulation
AMPL.. ................... amplifier
APC ............ automatic phase
control
ASSY ...................... assembly
AUX ....................... auxiliary
avg ............................ average
A WG .............. American wire
gauge
BAL .......................... balance
BCD ................. binary coded
decimal
BD .............................. board
BE CU .................... beryllium
copper
B FO ............... beat frequency
oscillator
BH ..................... binder head
BKDN ................. breakdown
BP .......................... bandpass
BPF ................ bandpass filter
BRS .............................. brass
BWO ............ backward-wave
oscillator
CAL ........................ calibrate
ccw ............ counter-clockwise
CE R .......................... ceramic
CHAN ....................... channel
cm ........................ centimetre
CMO ...... cabinet mount only
COAX ....................... coaxial
1-A-24-3
4-12
Table 4-6. Reference Designations and Abbreviations
REFERENCE DESIGNATIONS
E ..................... miscellaneous
electrical part
F .................................... fuse
FL ................................. filter
H ............................ hardware
HY ......................... circulator
J ............. electrical connector
(stationary portion)
jack
K ................................... relay
L .................................... coil;
inductor
M ................................. meter
MP .................. miscellaneous
mechanical part
P ............ electrical connector
(movable portion);
plug
Q ........................... transistor;
SCR;
triode thyristor
R ............................... resistor
RT ........................ thermistor
S .................................. switch
T ........................ transformer
TB ................. terminal board
TC ................... thermocouple
TP .......................... test point
U ...............
integrated circuit;
microcircuit
ABBREVIATIONS
COEF .................... coefficient
COM ....................... common
COMP .............. composition
COM PL .................. complete
CONN ................... connector
CP .................. cadmium plate
CRT ........... cathode-ray tube
CTL .............. complementary
transistor logic
CW .............. continuous wave
cw ........................... clockwise
cm ........................ centimetre
D /A ............ digital-to-analog
dB .............................. decibel
dBm .............. decibel referred
to I mW
de ..................... direct current
deg .............................. degree
(temperature interval)
or difference
0
............
degree (plane angle)
°
C .................. degree Celsius
(centigrade)
°
F ............. degree Fahrenheit
°
K .................. degree Kelvin
DEPC ........ deposited carbon
DET ......................... detector
diam ........................ diameter
DIA ......................... diameter
(used in parts list)
DIFF AMPL ....... differential
amplifier
div ............................ division
DPDT ............... double-pole,
double-throw
DR ................................ drive
DSB ............ double sideband
DTL ............. diode transistor
logic
DVM ........... digital voltmeter
ECL ..... emitter coupled logic
EMF ................ electromotive
force
EDP ............... electronic data
processing
E LECT ................. electrolytic
ENCAP ............. encapsulated
EXT ......................... external
F .................................. farad
FET.. .................... field-effect
transistor
FI F .......................... flip flop
FH .......................... flat head
FIL H ................ fillister head
FM ........................ frequency
modulation
FP ....................... front panel
FREQ ................... frequency
FXD .............................. fixed
g .................................... gram
GE ....................... germanium
GHz ....................... gigahertz
GL. ................................ glass
G RD ................... ground(ed)
H .................................. henry
h .................................... hour
HET .................... heterodyne
H EX ...................... hexagonal
HD ................................ head
HOW ..................... hardware
HF ................. high frequency
HG ........................... mercury
HI .................................. high
HP ............. Hewlett-Packard
H PF ............... high pass filter
HR ................................ hour
(used in parts list)
HV ..................... high voltage
Hz ................................ Hertz
IC ............... integrated circuit
ID ................. inside diameter
IF ...................... intermediate
frequency
IMPG ................ impregnated
in ................................... inch
INCD ................ incandescent
INCL. .................... .include(s)
lNP .............................. input
INS ....................... insulation
INT ........................... internal
NOTE
All abbreviations in the parts list will be in upper-case.
Model 7475A
V .............................. electron
tube
VR ............................ voltage
regulator;
breakdown
diode
W ................................. cable;
transmission path;
wire
x .................................
socket
Y ......................... crystal unit
(piezo-electric or
quartz)
Z .......................
tuned cavity;
tuned circuit
kg ............................ kilogram
kHz ......................... kilohertz
kO .............................. kilohm
kV ............................. kilovolt
lb ................................ pound
LC ....................... inductance-
capacitance
LED ....... light-emitting diode
LF ................... low frequency
LG .................................. long
LH .......................... left hand
LIM .............................. limit
LIN ..................... linear taper
(used in parts list)
lin ................................. linear
L K WASH ......... lock washer
LO .......... low; local oscillator
LOG ........... logarithmic taper
(used in parts list)
log .................... Iogarithm(ic)
LPF ................. low pass filter
L V ...................... .low voltage
m .................. metre (distance)
mA ..................... milliampere
MAX ..................... maximum
MO ......................... megohm
MEG ...................... meg
(lo")
(used in parts list)
MET FLM ............ metal film
MET OX ......... metallic oxide
MF .......... medium frequency;
microfarad
(used in parts list)
MFR ................ manufacturer
mg .......................... milligram
MHz ...................... megahertz
m H ........................ mi Iii henry
mho ................................ mho
MIN ....................... minimum
min ................... minute (time)
' ................................. minute
(plane angle)
MINAT .................. miniature
mm ........................ millimetre
MOD ................... modulator