Motorola APX 1000 Basic Service Manual page 515

Glossary
Term
PC Board
personality
phase-locked loop
PL
PLL
preprogrammed
Private
(Conversatiion) Call
private-line tone
squelch
programmable
Programmable
Read-Only Memory
PROM
PTT
Push-to-Talk
radio frequency
radio frequency
power amplifier
Radio Interface Box
Radio Service
Software
random access
memory
RAM
read-only memory
Printed Circuit Board. Also referred to as a PCB.
A set of unique features specific to a radio.
A circuit in which an oscillator is kept in phase with a reference, usually
after passing through a frequency divider.
See private-line tone squelch.
See phase-locked loop.
A software feature that has been activated by a qualified radio
technician.
A feature that lets you have a private conversation with another radio
user in the group.
A continuous sub-audible tone that is transmitted along with the carrier.
See also DPL.
A radio control that can have a radio feature assigned to it.
A memory chip on which data can be written only once. Once data has
been written onto a PROM, it remains there forever.
See Programmable Read-Only Memory.
See Push-to-Talk.
The switch or button usually located on the left side of the radio which,
when pressed, causes the radio to transmit. When the PTT is released,
the unit returns to receive operation.
The portion of the electromagnetic spectrum between audio sound and
infrared light (approximately 10 kHz to 10 GHz).
Amplifier having one or more active devices to amplify radio signals.
A service aid used to enable communications between a radio and the
programming software.
DOS-based software containing the feature set of an ASTRO radio. See
also CPS.
A type of computer memory that can be accessed randomly; that is, any
byte of memory can be accessed without touching the preceding bytes.
See random access 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.
Definition
Glossary-7