6871620L01-C
May 28, 2008
Glossary
Glossary-7
read-only memory
A type of computer memory on which data has been prerecorded. Once
data has been written onto a ROM chip, it cannot be removed and can
only be read.
real-time clock
A module that keeps track of elapsed time even when a computer is
turned off.
receiver
Electronic device that amplifies RF signals. A receiver separates the
audio signal from the RF carrier, amplifies it, and converts it back to the
original sound waves.
registers
Short-term data-storage circuits within the microcontroller unit or
programmable logic IC.
repeater
Remote transmit/receive facility that re-transmits received signals in
order to improve communications range and coverage (conventional
operation).
repeater/talkaround
A conventional radio feature that permits communication through a
receive/transmit facility, which re-transmits received signals in order to
improve communication range and coverage.
RESET
Reset line: an input to the microcontroller that restarts execution.
RF
RF PA
See radio frequency power amplifier.
RIB
ROM
RPCIC
Regulator/power control IC.
RSS
RTC
RX
Receive.
RX DATA
Recovered digital data line.
SAP
SCI IN
See Serial Communication Interface Input Line.
Serial Audio CODEC
Port
SSI to and from the GCAP II IC CODEC used to transfer transmit and
receive audio data.
Serial
Communication
Interface Input Line
A full-duplex (receiver/transmitter) asynchronous serial interface.
Serial Input/Output
IC
An integrated circuit that provides SB9600 serial and power-control
functions.
Term
Definition
Summary of Contents for ASTRO XTSTM 4000
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Page 16: ...May 28 2008 6871620L01 C xiv Commercial Warranty Notes ...
Page 22: ...May 28 2008 6871620L01 C 1 6 Introduction Notes ...
Page 26: ...May 28 2008 6871620L01 C 2 4 Radio Power Notes ...
Page 56: ...May 28 2008 6871620L01 C 3 30 Theory of Operation Notes ...
Page 100: ...May 28 2008 6871620L01 C 6 8 Troubleshooting Waveforms Notes ...
Page 194: ...May 28 2008 6871620L01 C B 2 Motorola Service Centers Notes ...
Page 204: ...May 28 2008 6871620L01 C Glossary 10 Glossary Notes ...
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