vi
MISO Master In Slave Out; used by the slave device to send data to the master device.
MOSI Master Out Slave In; used by the master device to send data to the slave device.
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.
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.
PLL Phase-Locked Loop; a circuit in which an oscillator is kept in phase with a
reference, usually after passing through a frequency divider.
PTT Push-To-Talk; the switch located on the left side of the radio which, when
pressed, causes the radio to transmit.
Registers Short-term data-storage circuits within the microcontrol unit or
programmable logic IC.
Repeater Remote transmit/receive facility that re-transmits received signals in order to
improve communications coverage.
RESET Reset line; an input to the microcontroller that restarts execution.
RF PA Radio Frequency Power Amplifier
RSS Radio Service Software
RPT/TA RePeaTer/Talk-Around
RX DATA Recovered digital data line.
Signal Qualifier
Mode
An operating mode whereby the radio is muted but still continues to analyze
receive data to determine RX signal type.
SCI IN Serial Communication Interface INput line
SLIC Support-Logic IC; a custom gate array used to provide I/O and memory
expansion for the microcontroller.
Softpot Software potentiometer; a computer-adjustable electronic attenuator.
Software Computer programs, procedures, rules, documentation, and data pertaining
to the operation of a system.
SPI Serial Peripheral Interface; how the microcontroller communicates to
modules and ICs through the CLOCK and DATA lines.
To Next Page
Loading...
