BSTJ 62: 10. December 1983: Acronyms and Abbreviations.

ACRONYMS AND ABBREVIATIONS

ACO

alarm cutoff

AGC

automatic gain control

AM

amplitude modulated

AR6A

amplitude modulation radio at 6 GHz, version A

BEF

band-elimination filter

BFE

beam-forming electrode

BPF

bandpass filter

BSP

Bell System Practices

BSR

Bell System reference

BSRF

Bell System reference frequency

BSRT

Bell System reference tone

BSRTU

Bell System reference transmitting unit

CMOS

complementary metal-oxide semiconductor

CRT

cathode ray tube

D/A

digital-to-analog

DAS

Data Acquisition System

DDD

direct distance dialing

DUT

device under test

EMI/RFI

electromagnetic interference/radio frequency ir

PT1PP

EQ

CIIL.C

equalizer

FB

front-to-back ratio

FET

field-effect transistor

FSK

frequency shift-keyed

G/T

gain/temperature

HPF

high-pass filter

IF

intermediate frequency

IM

intermodulation

JFS

jumbogroup frequency supply

LC

inductor capacitor

LED

light-emitting diode

LIF

lower-band intermediate frequency

LO

local oscillator

LO

locally generated microwave carrier

LOA

law of addition

LPF

low-pass filter

LSB

lower sideband

MCSS

microwave carrier synchronization supply

MG

mastergroup

MGDF

mastergroup distributing frame

MGTB

mastergroup translator, type B

MMG

multimastergroup

3491

MMGT-R multimastergroup translator-radio

OMFS office master frequency supply

PAL phase alternation line

PFS primary frequency supply

PLL phase-locked loop

PM phase modulated

PSTS pilot selection test set

R-C resistor-capacitor

RF radio frequency

RFS regional frequency supply

SC suppressed carrier

SCOTS Surveillance and Control of Transmission Systems

SDC Shottky diode converters

SDS Software Development System

SECAM sequential with memory

SL section loss

SPDT single-pole double throw

SSB single sideband

SSBAM single-sideband amplitude modulation

STMS selective transmission measuring set

TASC telecommunication alarm surveillance and control

TDMA time division multiple access

TL transmission level

TR transmitter-receiver

TSS-R Transmission Surveillance System-Radio

TTL transistor-transistor logic

TWT traveling-wave tube

UIF upper-band intermediate frequency

USB upper sideband

VCO voltage-controlled oscillator

VDC varactor diode converters

XPD cross-polarization discrimination

3492 THE BELL SYSTEM TECHNICAL JOURNAL, DECEMBER 1983