Motorola XPR 4550 Manual de instalación - Página 39

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Motorola XPR 4550 Manual de instalación
Term
over-the-air rekeying
PA
paging
Patriot IC
PC Board
phase-locked loop
PL
PLL
private-line tone
squelch
Programmable
Read-Only Memory
programming cable
PROM
PTT
Push-to-Talk
radio frequency
radio frequency
power amplifier
Radio Service
Software
RAM
random access
memory
read-only memory
6816812H01
Allows the dispatcher to remotely reprogram the encryption keys in the
radio.
Power amplifier.
One-way communication that alerts the receiver to retrieve a message.
A dual-core processor that contains an MCU and a DSP in one IC
package.
Printed Circuit Board. Also referred to as a PCB.
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 continuous sub-audible tone that is transmitted along with the carrier.
See also DPL.
A memory chip on which data can be written only once. Once data has
been written onto a PROM, it remains there forever.
A cable that allows the CPS to communicate directly with the radio
using RS232.
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.
Not used with XTL 5000. See Customer Programming Software.
See random access memory.
A type of computer memory that can be accessed randomly; that is, any
byte of memory can be accessed without touching the preceding bytes.
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-5
March 23, 2006