Glossary-3
Standby Mode An operating mode whereby the radio is muted but still continues to receive
data.
System Central
Controller
Main control unit of the trunked dispatch system; handles ISW and OSW
messages to and from subscriber units (see ISW and OSW).
System Select The act of selecting the desired operating system with the system-select switch
(also, the name given to this switch).
TOT Time-Out Timer: a timer that limits the length of a transmission.
TPL Tone Private-line.
µC Microcontroller.
UHF Ultra High Frequency.
µP Microprocessor.
VCO Voltage-Controlled Oscillator: an oscillator whereby the frequency of oscillation
can be varied by changing a control voltage.
VCOBIC Voltage-Controlled Oscillator Buffer Integrated Circuit.
VHF Very High Frequency.
VSWR Voltage Standing Wave Ratio.
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