B&G Network GPSplus - Manual (Page 5)

5
INTRODUCTION
After installation the GPSPlus can be used immediately with
minimal setting up for basic operation. To use the advanced
features of the GPSPlus display it is necessary to program
various parameters and enter waypoints and routes into the
units library. These will be discussed in later sections of this
handbook.
SWITCHING ON
The GPSPlus will power up and start receiving and
processing the signals from the satellites when the switch or
contact breaker for your instruments supply is turned on.
The display unit does not have an ON/OFF switch.
INITIAL DISPLAYS
On power-up the unit will show its satellite receiving status:
When a brand new unit is powered up for the first time, or if
the unit has moved more than 1500km since it was last
powered up, it may take up to an hour to acquire enough
satellites for a fix.
On subsequent power-ups the GPSPlus should quickly
obtain enough satellites for a fix, and the WAIT message
will only be displayed momentarily. If after a period of 15
minutes the display still shows NO DATA then check your
installation. If everything seems to be in order consult your
dealer.
The GPSPlus system requires only three satellites to obtain
a `fix'. When the unit has obtained a fix (in GPS mode) the
display will show the following:
If the GPSPlus display has not been programmed with any
navigational data (i.e. waypoints or routes) only the POS
key gives useful information.
Your GPSPlus has the ability to be used with a secondary
position fixing device, either a LORAN-C or a DECCA. The
unit will initially power-up using its own GPS
antenna/receiver unit. Selecting LORAN-C or DECCA
receiver will be explained later in this manual. Once
selected the GPSPlus will always power-up using the
selected receiver.