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Replaceable
Parts
Model
8904A
Table
6-2.
Abbreviations
(2
of
2)
MOD
....
modulator
MOM
...........
momentary
device)
mV
................
millivolt
mVac
...........
millivolt, ac
mVpp
.......
millivolt, peak-
mVrms
.........
millivolt, rms
mW
...............
milliwan
MUX
.............
multiplex
MY
.................
mylar
&
............
microampere
pF
..............
microfarad
pH
.............
microhenry
pV
...............
microvolt
pVac
..........
microvolt, ac
pVdc
..........
microvolt, dc
@Vpk
........
microvolt. peak
pVp-p
.......
microvolt, peak-
pvrms
........
microvolt, rms
pW
..............
microwatt
to-peak
to-peak
N/O
..........
normally open
NOM
..............
nominal
NORM
.............
normal
NPN negative-positive-
NPO
.......
negative-positive
zero (zero tempera-
ture coefficient)
NRFR
.....
not recommended
for field replacement
NSR
.........
not separately
replaceable
ns
.............
nanosecond
nW
.....
...
nanowatt
OBD
....
order by description
OD
........
outside diameter
OH
..............
oval head
OP AMPL
.......
operational
.........
option
.......
oscillator
OX..
................
oxide
......
ounce
peak
(used
in parts
PAM
........
pulse-amplitude
PC
...........
printed circuit
PCM
....
pulse-code modula-
tion; pulse-count
modulation
PDM
.........
pulse-duration
modulation
pF ...............
picofarad
PH
BRZ
....
phosphor bronze
PHL
...............
Phillips
PIN
........
positive-intrinsic-
ltage
peak
lock
PLO
....
phase lock oscillator
PM
.......
phase modulation
PNP
......
positive-negative-
P/O
................
part of
POLY
..........
polystyrene
PORC
............
porcelain
POS
.
,
.
,
.
positive: position(s)
POSN
.............
position
amplifier
modulation
negative
positive
(used in parts list)
p-p
...........
peak-to-peak
in parts list)
modulation
PPM
.........
pulse-position
PREAMPL
......
preamplifier
PRF
........
pulse-repetition
PRR
....
pulse repetition rate
ps
.............
picosecond
PT
..................
point
PTM
............
pulse-time
PWM
...........
pulse-width
frequency
modulation
modulation
RECT
..............
rectifier
....
reference
REG
.............
regulated
REPL
..........
replaceable
interference
RH
...
round head; right hand
RLC
.............
resistance-
inductance-
capacitance
RMO
.......
rack mount only
rms
.......
root-mean-square
RND
................
round
ROM
.....
read-only memory
R&P
.........
rack and panel
RWV
.......
reverse working
S
ng parameter
S-B
........
slow-blow (fuse)
(used
in
parts list)
SCR
.......
silicon controlled
rectifier; screw
SE
...............
selenium
SECT
.............
sections
voltage
S
second (time)
...
(plane angle)
SI
..................
silicon
SIL..
................
silver
SL
...................
slide
SNR
....
signal-to-noise ratio
SPDT
..........
single-pole,
double-throw
SPG
................
spring
SR
...............
splitring
SPST single-pole,
SS ...........
Service Sheet
SSB
........
single sideband
STL
.........
SWR
....
standing-wave ratio
SYNC
..........
synchronize
T
.....
timed (slow-blow fuse)
TA tantalum
TC
............
temperature
compensating
W
TD
..............
time delay
TERM
.............
terminal
TFT
......
thin-film transistor
THD
................
thread
THRU
.............
through
TI
.................
titanium
TOL
.............
tolerance
................
TGL toggle
TTL
.....
transistor-transistor
N
...............
television
TVI
....
television interference
TWT
.....
traveling wave tube
U
........
micro (used
in
parts list)
UF
......
microfarad (used in
parts list)
UHF
.....
ultrahigh frequency
UNDEF
..........
undefined
UNFEG
........
unregulated
v
.....................
volt
VA
.............
voltampere
Vac
...............
volts, ac
VAR
...............
variable
logic
VCO
......
voltage-controlled
oscillator
Vdc
...............
volts, dc
VDCW
.....
volts, dc, working
(used
in
parts list)
oscillator
VHF
.....
very-high frequency
Vrms
............
volts, rms
VSWR
......
voltage standing
wave ratio
oscillator
voltmeter
VTO
...........
voltage-tune
VTVM
.........
vacuum-tube
V(X)
.........
volts, switched
w..
..................
wan
wl
...................
with
WIV
........
working inverse
voltage
WW
............
wirewound
W/O
...............
without
Z,
...........
characteristic
impedance
YIG
......
yttrium-iron-garnet
NOTE
All abbreviations in the parts list will
be
in
upper-case.
MULTIPLIERS
Abbreviation
T
G
M
k
da
d
m
n
P
f
a
C
P
Prefix
tera
gigs
mega
kilo
deka
deci
centi
milli
micro
nano
pic0
femto
ano
Multiple
10’2
1
09
1
06
103
10
10-1
10-2
10-3
10-6
10-9
10-12
10-’5
10-18
6-4