November 16, 2006
6881094C31-E
Glossary-4
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
IF
Intermediate Frequency.
IMBE
A sub-band, voice-encoding algorithm used in ASTRO digital voice.
inbound signaling
word
Data transmitted on the control channel from a subscriber unit to the
central control unit.
integrated circuit
An assembly of interconnected components on a small semiconductor
chip, usually made of silicon. One chip can contain millions of
microscopic components and perform many functions.
ISW
keep-alive mode
A software-controlled operational mode in which power for the radio
remains on after the On/Off/volume control knob is turned off to allow
the microcontroller unit to complete its power-down sequence. Then,
the radio completely powers off.
key-variable loader
A device used to load encryption keys into a radio.
kHz
kilohertz
One thousand cycles per second. Used especially as a radio-frequency
unit.
KVL
LCD
LED
light emitting diode
An electronic device that lights up when electricity is passed through it.
liquid-crystal display
An LCD uses two sheets of polarizing material with a liquid-crystal
solution between them. An electric current passed through the liquid
causes the crystals to align so that light cannot pass through them.
LO
Local oscillator.
Term
Definition
Содержание ASTRO XTS-5000
Страница 7: ...vi Table of Contents November 16 2006 6881094C31 E Notes ...
Страница 11: ...x List of Figures November 16 2006 6881094C31 E Notes ...
Страница 17: ...November 16 2006 6881094C31 E xvi CommercialWarranty Notes ...
Страница 31: ...November 16 2006 6881094C31 E xxx Portable Radio Model Numbering System Notes ...
Страница 83: ...November 16 2006 6881094C31 E 3 44 Theory of Operation Encryption Module ...
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 ...
Страница 355: ...8 180 Schematics Board Overlays and Parts Lists VOCON Boards November 16 2006 6881094C31 E Notes ...
Страница 367: ...November 16 2006 6881094C31 E Glossary 10 Notes ...
Страница 373: ...Index 6 November 16 2006 6881094C31 E Notes ...