Operating instructions

G-2
MHz Megahertz: One million cycles per second. Used especially as a radio-
frequency unit.
Paging One-way communication that alerts the receiver to retrieve a message.
PC Board Printed Circuit Board. Also referred to as a PCB.
PL Private-Line Tone Squelch: A continuous sub-audible tone that is
transmitted along with the carrier.
Programming Cable A cable that allows the CPS to communicate directly with the radio
using USB.
Receiver Electronic device that amplifies RF signals. A receiver separates the
audio signal from the RF carrier, amplifies it, and converts it back to the
original sound waves.
Repeater Remote transmit/receive facility that re-transmits received signals in
order to improve communications range and coverage (conventional
operation).
RF Radio Frequency: The portion of the electromagnetic spectrum between
audio sound and infrared light (approximately 10 kHz to 10 GHz).
RX Receive.
Signal An electrically transmitted electromagnetic wave.
Spectrum Frequency range within which radiation has specific characteristics.
Squelch Muting of audio circuits when received signal levels fall below a pre-
determined value. With carrier squelch, all channel activity that exceeds
the radio’s preset squelch level can be heard.
TOT Time-out Timer: A timer that limits the length of a transmission.
TPL Tone Private Line
Transceiver Transmitter-receiver. A device that both transmits and receives analog
or digital signals. Also abbreviated as XCVR.
Transmitter Electronic equipment that generates and amplifies an RF carrier signal,
modulates the signal, and then radiates it into space.
TX Transmit.
UHF Ultra-High Frequency.
USB Universal Serial Bus: An external bus standard that supports data
transfer rates of 12 Mbps.
VIP Vehicle Interface Port.
XPR Refers to Digital Professional Radio model names in the MOTOTRBO
Professional Digital Two-Way Radio System.
Term Definition