18
Detail
4.6.2 Automatic Acknowledgement
The VHF can be set up to automatic acknowledge the following calls:
• Safety Position Requests - Default disabled after power-up
• Safety Test Requests - Default enabled after power-up
• Routine Polling Requests - Default enabled after power-up
After power-up the behavior can be changed from menu 4.5.4.
The automatic acknowledgement (if enabled) will take place without informing the operator.
The calls are stored in the receive/transmit log. The operator might experience a short
interruption in functionality while the automatic acknowledgement takes place (e.g. scanning,
dual watch).
4.6.3 Automatic Channel Shift
The VHF can be set up to automatically change working channel on reception of the
following calls:
• Individual radiotelephony acknowledgement with a valid channel information
• Radiotelephony group calls with valid channel information
• Radiotelephony all ship safety calls with valid channel information
The set-up is done via menu 4.5.5. The setting will survive powering off the product.
If enabled a received call will start the (normally) periodic alarm only once. The channel will
switch immediately after and the window is closed.
The automatic channel shift is overruled (turned to manual acknowledgement - requiring
push on OK or make a hook-on to hook-off transition) if:
• Any handset is hooked off
• The received call cannot currently be presented on the information display (due to
priority)
Distress calls and all ship calls with category distress or urgency will alert continuously until
manually handled from the front.
4.7 Implicit Behaviour for Operations with DSC
This section describes assumptions and decisions made that are critical for correct function-
ality, but might be hidden to the operator in the display.
4.7.1 DSC Transmission
All DSC calls are transmitted on channel 70 with a transmitter power of 25W. Distress,
Urgency and non-test safety calls are always transmitted. Other calls are only sent if the
radio is not already recognizing a DSC message on channel 70.
0505
To Next Page
Loading...
Need help?
General
