Motorola ASTRO XTSTM 4000, Detailed Service Manual

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6871620L01-C May 28, 2008
Glossary Glossary-3
digital signal
processor code Object code executed by the Digital Signal Processor in an ASTRO
subscriber radio. The DSP is responsible for computation-intensive
tasks, such as decoding ASTRO signaling.
DPL See Digital Private-Line. See also PL.
DSP See digital signal processor.
DSP code See digital signal processor code.
DTE See Data terminal equipment.
DTMF See dual tone multi-frequency.
dual tone multi-
frequency The system used by touch-tone telephones. DTMF assigns a specific
frequency, or tone, to each key so that it can easily be identified by a
microprocessor.
EEPOT Electrically Programmable Digital Potentiometer.
EEPROM See Electrically Erasable Programmable Read-Only Memory.
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 document that provides interim updates to a publication until the
entire publication can be updated and reissued.
Term Definition