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Full text of "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