Standard Horizon CPV550 MEM, MEM, [WX], [WX], [SQL], [H/L], [H/L], [PTT], [H/L], [16/9], [16/9], [16/9], [CALL], The WX key, The DW key, [SCAN/MEM], [SCAN/MEM], [SCAN/MEM]

The SQL (Squelch) knob

Adjusting [SQL] clockwise, sets the point at which random noise on the channel does not activate the audio circuits but a received signal does. This point is called the squelch threshold. Further adjustment of the squelch control will degrade reception of wanted transmissions.

The Alphanumeric Keypad

Allows entering letters or numbers on Radio or DSC menus.

The 16/9 key

Immediately recalls channel 16 from any channel location. Holding down this key recalls channel 9. Pressing [16/9] again reverts to the previous selected working channel.

Secondary use

Press and hold [16/9] then press [WX] to changes from USA, International, and Canadian channel groups.

The WX key

Immediately recalls the previously selected NOAA weather channel from any channel.

Secondary use

Holding down [16/9] while pressing [WX] changes from USA, International and Canadian channel groups.

The DW key

Pressing this key enables dual watch between a priority channel (Ch16 is the default) and a selected channel until a signal is received. When a signal is received on the selected channel the radio will momentarily switch to the Priority channel and listen for communications. Refer to section “18.10 DUAL WATCH (TO PRIORITY CHANNEL)” for details.

The SCAN/MEM key

Press [SCAN/MEM] to start and stop the scanning of programmed channels. Refer to section “18.11 SCANNING” for details.

Secondary use

To memorized a channel into scan memory, select the channel and press and hold [SCAN/MEM] until “MEM” is shown in the “VHF Radio” window on the display.

To delete a memorized channel from scan memory, select the channel and press and hold [SCAN/MEM] until “MEM” is removed from the display.

The H/L key

Press [H/L] to toggle the transmit output power between 25 W (High) and 1 W (Low) power. When [H/L] is pressed while the transceiver is on channel 13 or 67, the power will temporarily switch from LO to HI power until [PTT] is released.

[H/L] does not function on transmit inhibited and low power only channels.

NOTE

1W low power is indicated by “LO” on the display, when 25W high power is selected the display shows “HI” on the display.

The CALL key

Press [CALL] to access the DSC OPERATION menu. “INDIVIDUAL CALL,” “GROUP CALL,” “ALL SHIPS CALL,” “POSITION REQUEST,” “POSITION SEND,” “DSC STANDBY,” and “DSC LOG” functions, selected by the Soft Keys located underneath the display.

NOTE

To use DSC functions a MMSI must be entered. Refer to section “19.1 MARITIME MOBILE SERVICE IDENTITY (MMSI).”

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