P
power
PCM
pulse code modulation
PEMA
procurement of equipment and missiles, Army
PEP
peak envelope power
PL
phase line
PLL
PLRZ
PLTS
pilots
PM
POL
petroleum, oils and lubricants
Port
portable
PR
primary zone/area
PRF
pulse repetition frequency
pri
priority
QMR
qualitative materiel requirement
qtr
quarter R
R&S
reconnaissance and surveillance
RATG
radiotelegraph
RATT
radio teletypewriter
RCOC
Reserve Communications Operations Center
RDF
radio direction finding
RDTE
research, development, test and evaluation
Rec
receiver
Recon
REINF
reinforce
Retrans
retransmission
RF
radio frequency
RFA
radio frequency authority
rms
root-mean-square
Rn
reference noise
ROC
required operational capability
rpm
revolution per minute
Rqmt
requirement
R/W
radio/wire
RWI
radio wire integration
SAC
Strategic Air Command
SATCOMA
Satellite Communications Agency
SEATO
Southeast Asia Treaty Organization
SID
sudden ionospheric disturbances
sig
signal
SIGCEN
signal center
SIGINT
signal intelligence
SIG PLT CP
signal platoon command post
SIGSEC
signal security
SITREP
situation report
SL
switch location
SL
number secondary location/switch location
SHF
super high frequency
S/N
signal-to-noise
SOJT
supervised on the job training
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