User Guide

PAMS
System Module DB6
NHB–3
Technical Documentation
Original 26/97
Page 4–38
Definitions and Abbreviations
UIF User Interface module. . . .
EAR Ear phone. . .
MIC Microphone. . . .
SIO Serial Input/Output. . . .
IO Input/Output. . . . .
DSP Digital Signal Prosessor. . .
LCD Liquid Crystal Display. . . .
MCU Micro Controller Unit. . .
UIM User Identity Module. . . .
MRP Mouth Reference Point. . .
HP Hand Portable. . . . .
HFJ Hands Free Junction (box). . . .
LSP Loud SPeaker. . . .
ASIC Application Spesific Integrated Circuit (In this case D2CA ASIC). . .
VCTCXO Voltage Compensated Temperature Compensated oscillator
RFI RFI ASIC. . . .
PSL+ Power SuppLy IC+. . .
PWM Pulse Width Modulation. . .
VAD Voice Activity Detection. . . .
DTX Discontinuous Transmission. . . .
AGC Automatic Gain Control. . .
AFC Automatic Frequency Control. . . .
RF Radio Frequency. . . . .
TDMA Time divided multible access. .
PCM Pulse Code Modulation. . .
DTMF Dual Tone multi frequency. .
IF Intermediate Frequency. . . . . .
AD Analog to Digital. . . . .
DA Digital to Analog. . . . .
TXI In–phase signal. . . .
TXQ quadrature signal. . .