GLOSSARY OF TERMS
VHF
Very High Frequency: 30MH z to 300MHz
FM
Frequency Modulation
Carrier Wave
A Radio Frequency on which Intelligence is
superimposed
Dual Watch
M
onitor channel 16 while working on another
channel
All Scan
Scans all channels
Select Scan
Scans only user selected memory channels
U.S.A. Channels
Channel designations as defined by the FCC
International Channels
C
hannel designations as defined by
International Telecommunication U nion
Canadian Channels
Channel designat
i
ons as defined by the
DOC
Weather Channels
C
hannels for routine and emergency
weather information broadcast b y NOAA
Simplex
Transmit and receive on the same f requency
Duplex
T
ransmit and receive on different
frequencies
Squelch
To suppress totally
LCD
Liquid Crystal Display
TX
Transmit
RX
Receive
RF
Radio Frequency
CPU
Central Processing Unit
PLL
P
hase Lock Loop (A type of freq uency
Synthesizer)
VCO
Voltage Control Oscillator
PTT switch Microphone push-to-talk switch
iv