6881094C31-E
November 16, 2006
Glossary-3
DPL
See Digital Private-Line. See also PL.
DSP
DSP code
See digital signal processor code.
DTE
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
Florida Manual
Revision
A document that provides interim updates to a publication until the
entire publication can be updated and reissued.
frequency
Number of times a complete electromagnetic-wave cycle occurs in a
fixed unit of time (usually one second).
Term
Definition
Содержание ASTRO XTS-5000
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Страница 11: ...x List of Figures November 16 2006 6881094C31 E Notes ...
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Страница 31: ...November 16 2006 6881094C31 E xxx Portable Radio Model Numbering System Notes ...
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Страница 135: ...November 16 2006 6881094C31 E 5 44 Troubleshooting Charts Secure Hardware Failure Notes ...
Страница 175: ...November 16 2006 6881094C31 E 7 32 Troubleshooting Tables List of Board and IC Signals Notes ...
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