Raymarine RAY 210VHF User Manual

Page 11

GLOSSARY OF TERMS

VHF

Very High Frequency: 30MHz to 300MHz

Frequency Modulation

Carrier Wave

A Radio Frequency on which Intelligence is
superimposed

Dual Watch

Monitor 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

Channel designations as defined by
International Telecommunication Union

Canadian Channels

Channel designations as defined by the
DOC

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

Transmit

Receive

Radio Frequency

CPU

Central Processing Unit

PLL

Phase Lock Loop (A type of frequency
Synthesizer)

VCO

Voltage Control Oscillator

PTT switch

Microphone push-to-talk switch