SeaSTAR 3100LRS USER MANUAL
Issue 1.0 08/02
24
3100LRS VBS Services Menu
Displays various data being input to the unit via the NMEA-0183 inputs from
the internal or external GPS receiver. Some displays may show only zeroes if
that particular NMEA option is not enabled on the receiver. Minimum
requirement is for either the $GPGGA or $GPGLL sentences containing current
position. These menus are only available if your receiver is connected to the
VBS service.
If the receiver is in VBS mode but there is no GPS unit attached (either
internally or externally to the Auxiliary port) then this menu will display “No GPS
/ MANUAL Mode”.
VBS Services
by pressing the
⇒
key
the following sequence occurs. Pressing
the
⇐
key gives the same fields in
reverse.
Current Latitude
shows latitude of the
present position as read from the GPS
receiver. This will be adequate for
correct operation of the VBS whether or
not the GPS receiver is in differential
mode.
Current Longitude
shows longitude of
the present position as read from the
GPS receiver. This will be adequate for
correct operation of the VBS whether or
not the GPS receiver is in differential
mode.
GPS Time
shows longitude of the
present position as read from the GPS
receiver. For some GPS engines this will
be set to 00:00:00 until the receiver
starts computing a position.
Position Quality Information
•
'Q' is the mode flag (0 = invalid; 1 =
standard non-differential GPS; 2=
DGPS) as reported by the $GPGGA
NMEA telegram.
•
'SVs' shows the number of satellites
used for that particular position fix.
(If Q=0, SVs will generally also be
0). 'HDOP' shows the quality of the
fix geometry as a crude indicator of
Read from the $GPGGA sentence
VBS Services . . .
RECV
→
Lt : S 31 56’ 40.354
RECV
→
Q : 1 SVs : 5HDOP : 1
RECV
→
RECV
→
Ln : E 115 50’ 30.97”
RECV
→
GPSTime : 08:33:56
FSPAS
Ref.:
B31005102PMBRA0
