Garmin GHC 20 Benutzerhandbuch Seite 21

GHC Low Volt. Alarm: Sounds an alarm when the voltage of
the power supply connected to the device drops below a
specified level.
Language: Sets the on-screen language.
Operating Mode: Allows you to set the operating mode to
normal or store demo mode.
System Information: Allows you to view software information.
Factory Defaults: Resets the unit to factory defaults.
Selecting the Preferred Heading Source
If you have more than one heading source on the network, you
can select a your preferred source. The source could be a
compatible GPS compass or a magnetic heading sensor.
NOTICE
For best results, use a Garmin sensor for the heading source.
Using a third-party GPS compass can cause the data to be
delivered erratically and may result in excessive delays. The
autopilot needs timely information, and therefore cannot often
use third-party GPS compass data for GPS location or speed. If
a third-party GPS compass is used, the autopilot will likely report
loss of navigation data and speed source periodically.
1
Select Menu > Setup > Preferred Sources > Heading
Source
2
Select a source.
If the selected heading source is unavailable, the autopilot
screen does not display any data. You should select a
different heading source, if possible.
Device Configuration 5