Motorola SYMBOL MT2000 Series, Руководство по обслуживанию

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Glossary
A/D Analog to Digital converter; converts an instantaneous dc voltage level to a
corresponding digital value.
ALC 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.
CMOS Complementary metal-oxide semiconductor.
Channel Defines conventional transmit and receive frequencies and muting conditions.
Closed Architecture A controller configuration that utilizes a microcontroller with no external
memory (non-FLASHport operation).
CBI ( Customer Board Initialization) When the controller board is received, it will
need a serial from the defect unit. The serial is manually entered via the RSS
prior to proceeding any further with the replacement process.
D/A Digital to Analog converter; converts a digital value to a corresponding dc
voltage value.
DTMF Dual Tone Multi-Frequency.
DPL Digital Private-Line

.
Firmware 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.
FGU Frequency Generation Unit.
Flashcode A Motorola term (model option definition code) that determines what
FLASHport options are in a radio.
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.
IC Integrated Circuit.
ISW Inbound Signalling Word; data transmitted on the control channel from the
subscriber unit to the central controller.
LTR Logic Trunked Radio; a registered trademark of E.F. Johnson Company.
MCU MicroControl Unit.
MDC Motorola Digital Code.
OMPAC Over-Molded Pad-Array Carrier; a Motorola custom IC package, distinguished by
the presence of solder balls on the bottom pads.
Open Architecture A controller configuration that utilizes a microprocessor with extended ROM,
RAM, and EEPROM, (FLASHport capable).
OSW Outbound Signalling Word; data transmitted on the control channel from the
central controller to the subscriber unit.
PC Board Printed Circuit board.
PL Private-Line® tone squelch; a continuous sub-audible tone that is transmitted
along with the carrier.