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Glossary

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