Sailor RT5022, Operation Manual

Page: 16 / 60

12
Detail
3.5 Duplex Channels
If duplex channels are selected in the channel table (see chapter: Maritime Channels) the
VHF will operate in semi-duplex mode meaning the VHF is operated simplex but using two
different frequencies for receive and transmit.
3.6 ATIS (Inland Waterways Only)
ATIS is mandatory to use in inland waterways on e.g. the Rhine. ATIS is a digital data
stream containing ships call sign coded into a DSC-like message, sent over the voice
channel each time the PTT button is released. If PTT is continuously pushed ATIS is
automatically sent each 5 minutes.
ATIS is enabled automatically when BI is selected in menu (4.4.1).
For purpose of operater comfort the received ATIS signal on the active voice channel will be
muted.
The ATIS call sign is programmable from the service interface or from menu 4.4.3. once.
3.7 Transmitter power
Transmitter output power can always be chosen while the radio is active. Pushing the 1W
button will toggle the transmitter power between low power (below 1W) and high power
(below 25W). The 1W indicator is lit when low power is selected. As a default any channel
shift will cause the transmitter power to be adjusted to the maximum allowed on that channel.
3.8 Channel Scanning
Scanning is an extension to the dual watch functionality, by which it is possible to watch
multiple channels. It is possible to scan:
• All channels in a sequence
• A number of selected channels in a sequence organized into individual 3 scan tables
- Scan table A, B and C.
The scan type is selectable from the Scanning menu (3). The DW indicator is lit as well
(because the priority channel 16 by default is included in any scan table.
During scan “SC” is shown in the upper display.
If an active signal is found on a channel different from channel 16 the radio remains on that
channel for 10 seconds (but still respecting dual watch requirements), where after scanning
is resumed. The telephone display is displaying the active channel.
If an active signal is found on channel 16 the VHF is locked on channel 16 until the signal
disappears, where after scanning is resumed. The telephone display is displaying the active
channel (16).
While the active scanning window is shown scanning can be terminated by:
• Lifting handset off hook
• Pushing ´16´ - Channel 16 is used for working channel
• Pushing DISTRESS – Initiates DSC distress
• Pressing – Working channel is used as before scanning was entered
(regardless of carrier state).
• Pushing Replay - Message is replayed
0505