Raymarine Ray 106 User Manual - Glossary of Terms
GLOSSARY OF TERMS
VHF…………………………………… Very High Frequency (30 MHz to 300 MHz)
FM.……………………………………. Frequency Modulation.
MODULATION.……………………… To vary a carrier wave.
CARRIER WAVE.………………….... A radio frequency on which intelligence is superimposed.
DUAL WATCH.…………………….... Monitors channel 16 while working on another channel.
USA CHANNELS.………………....
Channel designations as defined by the FCC.
INTERNATIONAL CHANNELS….… Channel designations as defined by the International
Telecommunication Union.
CANADIAN CHANNELS.…………… Channel designations as defined by the Canadian Govt.
WEATHER CHANNELS.………….…
Channels for routine and emergency weather
information broadcast by NOAA.
SIMPLEX.…………………………….. Transmit and receive on the same frequency.
DUPLEX.…………………………….. Transmit and receive on different frequencies.
SQUELCH.…………………………... To suppress totally.
LCD.………………………………….. Liquid Crystal Display.
TX.…………………………………….. Transmit.
RX.……………………………………. Receive.
RF.……………………………………. Radio Frequency.
CPU.………………………………….. Control Processor Unit.
PLL.…………………………………… Phase Locked Loop (A type of Frequency Synthesizer).
VCO.…………………………………. Voltage Controlled Oscillator.
PTT.………………………………….. Microphone Push-To-Talk switch.