18. BASIC RADIO OPERATION
18.0RECEPTION
1.After the transceiver has been installed, ensure that the power supply and antenna are properly connected.
2.Press and hold [PWR] until the display shows the chart page.
3.Turn [SQL] counterclockwise until the “BUSY” appears in the “VHF Radio” window on the display.
4.Turn up [VOL] until noise or audio from the speaker is at a comfortable level.
5.Turn [SQL] clockwise until the random noise disappears. This state is known as the “Squelch threshold.”
6.Turn the Channel knob to select the desired channel. Refer to the channel chart on page 133 for available channels.
7.When a message is received, adjust the volume to the desired listening level. “BUSY” is displayed indicating that the channel is being used.
18.1TRANSMISSION
1.Perform steps 1 through 6 of section “18.0 RECEPTION.”
2.Before transmitting, monitor the channel to ensure it is clear.
THIS IS AN FCC REQUIREMENT!
3.Press [PTT] on the microphone. “TX” indicator will appear in the “VHF Radio” window on the display.
4.Speak slowly and clearly into the microphone.
5.When the transmission is finished, release [PTT].
NOTE
The CPV550 is supplied with a
18.2TRANSMIT TIME-OUT TIMER (TOT)
When the [PTT] on the microphone is held down, transmit time is limited to 5 minutes. This limits unintentional transmissions due to a stuck microphone. About 10 seconds before automatic transmitter shutdown, a warning beep will be heard from the speaker(s). The transceiver will automatically go to receive mode, even if [PTT] is continually held down. Before transmitting again, [PTT] must first be released and then pressed again.
18.3SIMPLEX/DUPLEX CHANNEL USE
Refer to the VHF MARINE CHANNEL CHART (page 133) for instructions on use of simplex and duplex channels.
NOTE
All channels are
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