Sailor RT5022 VHF DSC Operation Manual page 38

7.1.2 Operation
The optional handset is intended for VHF radiotelephony only. There will be no DSC
functionality supported except for:
• The functionality or lifting of the CU handset follows the default handset on the main
radio (see Section DSC receive), when receiving a DSC call.
• Possibility to mute DSC alarm sound – not to handle the DSC call.
7.1.3 ON/OFF
The semi-intelligent handset will always be turned off default after VHF unit is powered. The
off state is indicated by no activity or light in the CU.
The unit can be turned on and off (press for 1 second) on the ON button.
If the main unit is powered off the handset control unit is always turned off.
7.1.4 Channel selection
Channel selection is done by using exactly the method as described for VHF by using
and .
On the optional handset control unit these buttons are marked
and respectively.
Channel change requests are sent to the main VHF unit, and the main VHF unit will change
channel and update the CU display. The same channel number will be applied to all the
displays in the system.
A quick channel 16 selection is available by pressing
7.1.5 Volume
The volume is controlled by using the
Pressing these buttons will affect only the internal CU speaker as well as optionally con-
nected external CU speakers. The volume adjustment will be active only for the specific local
handset. Therefore the volume bar on the main VHF unit is not updated during adjustment.
A local volume indicator always shows the speaker volume on the CU. If the volume is
adjusted to the mute level the VOL LED will flash (1 Hz).
The earpiece volume in the handset connected to the CU is adjusted using the
and buttons while holding down the
This alternative usage of the
• The handset is hooked off, and
• No active alarm sound to be muted
After power-up all volume levels set during the last operation are restored as they were
before power-down.
32
and
button will be possible only when:
.
buttons.
button.
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