NAVMAN
8120/8084
Installation and Operation Manual
97
20-5 Installation: GPS antenna
Selecting an antenna
Fit one of these GPS antennas:
• Normally use the GPS antenna supplied.
• An optional differential beacon DGPS
antenna to give enhanced accuracy within
range of land based differential beacons
in areas where WAAS or EGNOS are not
available. Such a DGPS antenna has both
a GPS receiver and a beacon receiver,
and it automatically applies the beacon
correction to the GPS position.
• A compatible GPS or DGPS instrument
or antenna connected by NavBus (see
section 20-11) or NMEA (see section 20-12).
In this case, the Instrument does not need
its own antenna.
Note:
• To configure the Instrument for different
antenna options, see section 19-4.
For more information, contact your NAVMAN
dealer.
DGPS Source:
Enables or disables the satellite based DGPS
correction (see section 8). The options are
None
or
WAAS/EGNOS.
Do not Enable
WAAS/EGNOS outside their coverage areas
or the accuracy of the position might be
degraded.
!
WARNING
MOB will not work if the Instrument does
not have a GPS fix.
WAAS covers all of the USA and most of
Canada. To use WAAS, the GPS antenna must
have a clear view of the sky towards the
equator. EGNOS will cover most of Western
Europe.
Restart GPS:
Restarts the GPS receiver, satellite reception
will be lost until the receiver completes its
restart and acquires the satellites.
Select restart GPS and press
ENTER
Installing an antenna
If an external antenna is required, install
the antenna and fit the antenna cable back
to the display unit. Follow the instructions
in the manual supplied with the antenna.
Fit an optional NAVMAN extension cable if
required.
During setup, configure the Instrument for
the chosen antenna, see section 19-4.