Sailor RT5022 VHF DSC, Руководство по эксплуатации

Страница: 11 / 68

5
Basic
1.8 Channel selection
The system is defaulting to channel 16 after a normal power-on.
Channels can be selected using the
(increasing to next valid VHF channel) or
(decreasing channel). Channels can also be entered using the numeric keypad.
The active working channel is always shown in the upper display.
1.9 Dual watch
Dual watch is a mode where the priority channel (16) is scanned periodically for
a signal while listening on a working channel.
Dual watch is activated by pressing the DW button.
The DW indicator is lit while DW is active. Dual watch is deactivated by:
• Pressing DW – Continues to receive on the working channel.
• Pressing PTT – Transmits always on working channel
• Pressing ´16´.
• Pressing Replay - Dual watch is terminated while the message is replayed
and will then be re-invoked
Selecting a new channel while in dual watch mode will continue dual watch on the new
selected working channel, unless a signal is found on channel 16.
1.10 Replay
Replay is a facility built into the product which always will allow the operator to repeat the
latest 90 seconds of received voice data to be replayed in the acoustic devices.
Received voice data is defined when the squelch is open. This means that 90 seconds of
actual traffic could be accumulated over several hours/days.
If the 90 seconds storage limit is reached the oldest data is simply overridden with the
newest received traffic data (FIFO principle).
Activating replay
The front panel has a dedicated replay button.
A push on the replay button will bring up a (replay) window in the
information/message display. Holding down replay will drive a
counter to be updated in the display where it is determined how many
seconds of recorded data is wanted for replay - the last XX seconds
of recorded data.
If pressing the replay button in normal receive mode this will still allow the unit to receive
audio in the speaker system.
0544