Motorola ASTRO SPECTRA Service Manual

6881076C20-E February 3, 2003
Glossary-3
Electrically Erasable
Programmable
Read-Only Memory
A special type of PROM that can be erased by exposing it to an
electrical charge. An EEPROM retains its contents even when the
power is turned off.
FCC Federal Communications Commission.
firmware Code executed by an embedded processor such as the Host or DSP in
a subscriber radio. This type of code is typically resident in non-volatile
memory and as such is more difficult to change than code executed
from RAM.
FGU See frequency generation unit.
flash A non-volatile memory device similar to an EEPROM. Flash memory
can be erased and reprogrammed in blocks instead of one byte at a
time.
FLASHcode A 13-digit code which uniquely identifies the System Software Package
and Software Revenue Options that are enabled in a particular
subscriber radio. FLASHcodes are only applicable for radios which are
upgradeable through the FLASHport process.
FLASHport A Motorola term that describes the ability of a radio to change memory.
Every FLASHport radio contains a FLASHport EEPROM memory chip
that can be software written and rewritten to, again and again.
FMR See Florida Manual Revision.
Florida Manual
Revision
A publication that provides supplemental information for its parent
publication before it is revised and reissued.
frequency Number of times a complete electromagnetic-wave cycle occurs in a
fixed unit of time (usually one second).
frequency
generation unit
This unit generates ultra-stable, low-phase noise master clock and other
derived synchronization clocks that are distributed throughout the
communication network.
General-Purpose
Input/Output
Pins whose function is programmable.
GPIO See General-Purpose Input/Output.
host code Object code executed by the host processor in an ASTRO subscriber
radio. The host is responsible for control-oriented tasks such as
decoding and responding to user inputs.
IC See integrated circuit.
IF Intermediate Frequency.
IMBE A sub-band, voice-encoding algorithm used in ASTRO digital voice.
Term Definition

Motorola ASTRO SPECTRA Specifications

General

Frequency Range	136-174 MHz, 403-470 MHz
Number of Channels	Up to 255
Channel Spacing	12.5 kHz, 20 kHz, 25 kHz
Modulation	FM
Operating Temperature	-22°F to +140°F (-30°C to +60°C)