Raymarine Ray54 manual Appendix C Glossary

Appendix C: Glossary 97

Appendix C:		Glossary
	Term	Meaning
	All Scan	A feature that scans all channels.
	Canadian Channels	Channel designator as defined by Industry Canada.
	CH	Channel selection key
	DSC	Digital Selective Calling
	Dual Watch	A feature that monitors the Priority Channel 16 while working on
		another channel.
	Duplex	Transmit and receive on different frequencies
	FCC	Federal Communications Commission (US)
	International Channels	Channel designator as defined by the ITU
	ITU	International Telecommunications Union (EU)
	LCD	Liquid Crystal Display
	MMSI	Maritime Mobile Service Identity; a number issued by each country
		to identify maritime stations
	NOAA	National Oceanographic and Atmospheric Administration (USA)
	Priority Channel	Channel 16 or 9
	Priority Scan (PSCAN)	A feature that alternates monitoring the Priority Channel 16 with
		each of the regular channels
	PTT switch	Microphone push-to-talk switch
	RF	Radio Frequency
	RX	Receive
	Saved Scan	Scans only user-selected memory channels
	Simplex	Transmit and receive on the same frequency
	Squelch	A circuit that sets the threshold for cutting off the receiver when the
		signal is too weak for reception of anything but noise.
	TX	Transmit
	Tri Watch	A function that monitors the Priority Channel and the Secondary
		Priority Channel while working on another channel.
	US Channels	Channel designations as defined by the FCC.