Glossary Of Terms - Motorola EP350 Basic Service Manual

Glossary of Terms

Term
ALC
ASFIC
BKC
CD
CMP
CPS
CSQ
DTMF
DPL
EEPROM
EPP
Firmware
FGU
GaAs
GKC
ISW
LH DATA
LLE
MCU
MRTI
OMPAC
PC Board
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 (Voltage Standing Wave Ratio).
Audio Signalling Filter Integrated Circuit
Bad Key Chirp
Compact Disk
Compression
Customer Programming Software
Carrier Squelch
Dual-Tone Multifrequency
Digital Private-Line™
Electronically Erasable/Programmable Read-Only Memory: used by the radio to store its
personality
Environmental Preferred Product
Software, or a software/hardware combination of computer programs and data, with a
fixed logic configuration stores in a read-only memory. Information cannot be altered or
reprogrammed.
Frequency Generation Unit
Gallium Arsenide: a type of crystalline material used in some semiconductors.
Good Key Chirp
Inbound Signalling Word: data transmitted on the control channel from a subscriber unit
to the central control unit.
Longhorn Data: a bidirectional 0-5V, RS-232 line protocol that uses the microcontroller's
integrated RS-232 asynchronous serial communications interface (SCI) peripheral.
Low Level Expander: slight amount of volume expansion; used to improve the signal to
noise ratio.
Micro Controller Unit
Motorola Radio-Telephone Interconnect: a system that provides a repeater connection to
the Public Switched Telephone Network (PSTN). The MRTI allows the radio to access
the telephone network when the proper access code is received.
Over-Molded Pad-Array Carrier: a Motorola custom package, distinguished by the
presence of solder balls on the bottom pads.
Printed Circuit Board
Definition