User's Guide

Operation
Page 12
3.2 Turning the transceiver on
The Poseidon transceiver does not have a power switch and is designed to be permanently powered. When
power is first applied the display will show a splash screen followed by software version information. Each
screen is shown for 5 seconds before the main operating screen is shown.
3.3 Display layout
The display layout is shown in Figure 3. All operating screens show the time, status bar, scroll indicators and
relevant function keys. The time displayed is UTC time.
When no UTC time is available from the internal GNSS module the time display will show --:--:-- in place of the
time of day.
Figure 3 Display layout
3.3.1 Status bar icons
The status bar shows the current transceiver status using icons. The meaning of each icon is described in Table 1.
Icon Description
OK The transceiver is operating normally.
Tx Shown for one second following each transmission.
Rx Shown for one second following each received message.
INT
GPS
Shown when the internal GPS receiver has a valid position
fix.
EXT
GPS
Shown when a connected external GPS receiver has a valid
position fix.
INT
DGPS
Shown when the internal GPS receiver has a valid differential
position fix.
EXT
DGPS
Shown when a connected external GPS receiver has a valid
differential position fix.
NO
GPS
Shown when there is no valid internal or external position fix.
 Shown when unread AIS safety related text messages are
available.
HH:MM:SS
Select Screen
Main display area
UTC time
Left function key
Scroll indicators
Status bar
Right function key