Motorola ASTRO Digital XTS 3000 Базовое руководство по обслуживанию - Страница 7
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GLOSSARY
A/D
ABACUS IC
ADSIC
ALC
D/A
DTMF
DPL
DSP
Firmware
FGU
FLASHport™
Host
Host Port
IC
IMBE
ISW
LSH
MCU
MDC
A nalog to D igital converter; converts an instantaneous dc voltage level to a
corresponding digital value.
Custom integrated circuit providing a digital receiver IF backend.
ABACUS/DSP Support IC; custom integrated circuit providing peripheral
functions for the DSP.
Automatic Level Control; a circuit in the transmit RF path that controls RF
power amplifier output, provides leveling over frequency and voltage, and
protects against high VSWR.
Digital to Analog converter; converts a digital value to a corresponding dc
voltage value.
Dual Tone Multi-Frequency
Digital Private-Line™
Digital Signal Processor; microcontroller specifically tailored for signal
processing computations. In this case refers specifically to Motorola
DSP56001.
Software or a software/hardware combination of computer programs and data,
with a fixed logic configuration stored in a read-only memory; information
can not be altered or reprogrammed.
Frequency Generation Unit
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.
Motorola HC11F1 microcontrol unit U204 (see MCU).
Parallel memory mapped interface consisting of eight registers in the
DSP56001.
Integrated Circuit
A sub-band, voice encoding algorithm used in ASTRO digital voice.
Inbound Signalling Word; data transmitted on the control channel from a
subscriber unit to the central control unit.
Low Speed Handshake; 150 baud digital data sent to the radio during trunked
operation while receiving audio.
MicroControl Unit
Motorola Digital Communications
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