Motorola PM1200 Basic Service Manual page 132

Glossary-6
Term
RPCIC
RTC
RX
RX DATA
SAP
Serial Audio Port
Serial Peripheral
Interface
signal
software
spectrum
SPI
squelch
SRAM
SSI
Standby mode
static RAM
Synchronous Serial
Interface
time-out timer
TOT
transceiver
transmitter
TX
October 26, 2007
Regulator/power control IC.
See real-time clock.
Receive.
Recovered digital data line.
See Serial Audio Port.
SSI to and from the CODEC used to transfer transmit and receive audio
data.
A serial interface comprised of two data lines and a clock line. This
interface is typically used to communicate with other modules and ICs in
the radio.
An electrically transmitted electromagnetic wave.
Computer programs, procedures, rules, documentation, and data
pertaining to the operation of a system.
Frequency range within which radiation has specific characteristics.
See Serial Peripheral Interface.
Muting of audio circuits when received signal levels fall below a pre-
determined value. With carrier squelch, all channel activity that exceeds
the radio's preset squelch level can be heard.
See static RAM.
See Synchronous Serial Interface.
An operating mode in which the radio is muted but still continues to
monitor data.
A type of memory used for volatile, program/data memory that does not
need to be refreshed.
DSP interface to peripherals that consists of a clock signal line, a frame
synchronization signal line, and a data line.
A timer that limits the length of a transmission.
See time-out timer.
Transmitter-receiver. A device that both transmits and receives analog
or digital signals. Also abbreviated as XCVR.
Electronic equipment that generates and amplifies an RF carrier signal,
modulates the signal, and then radiates it into space.
Transmit.
Definition
6880309U09-A