Basic Functions; Switch Supply On/Off; Switch Speaker On/Off; Switch To Telephony/Dsc - Sailor HC4500B Operator's Manual

Basic Functions

Switch Supply On/Off

Switches equipment on when pressed. Switches equipment off when
pressed for 2 seconds.
Start-up display is 'Telephony' with last used settings.
Note: The equipment should always be switched on while at sea in order to
maintain continuous DSC watch on 2187.5 kHz.

Switch Speaker On/Off

Switches loudspeaker on/off.

Switch to Telephony/DSC

Switches between Telephony display and DSC display.

Telephony Functions

Select 2182 kHz

Sets TX and RX frequency to the radiotelephone distress frequency 2182
kHz, selects SSB Telephony mode, sets Power level High, Squelch Off,
Speaker On and increases Volume if lower than a preset level.

Change Mode

Changes between 'SSB TELEPHONY', 'AM BROADCAST', and 'DSC':
Optionally 'LSB' and 'SSB REMOTE', if enabled.
In AM BROADCAST mode TX frequency is shown dimmed and transceiver
cannot be keyed.

Change Output Power

Changes between 'HIGH POWER' and 'LOW POWER'
DSC calls are automatically sent in 'HIGH POWER'.
'LOW POWER' cannot be selected on the six telephony distress frequencies.

Re-tune the ATU

Starts a TX tuning sequence.
TX tuning is done automatically the first time the transmitter is keyed on a
new frequency and before any DSC transmission.
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