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Reference
If ‘GARMIN DGPS’ or ‘RTCM/NMEA’ format is
selected, additional fi elds are provided to control a
GARMIN differential beacon receiver (e.g. GBR 21) directly
from your eTrex Summit. You can enter the beacon fre-
quency and bit rate when you select ‘User’ from the Beacon
pop-up list to manually tune the receiver (you can also
‘scan’ if you don’t know what the nearby station is, but
the unit could continue scanning if reception is temporar-
ily lost).
To select an I/O Format:
1. Press the
PAGE
Button and switch to the MENU
Page. Use the
UP
and
DOWN
Button and highlight
the ‘SETUP’ fi eld. Press
ENTER
. The SETUP Page
appears.
2. Press the
UP
or
DOWN
Button and select the
‘INTERFACE’ fi eld. Press
ENTER
. The INTERFACE
Page appears.
3. Press
ENTER
on the ‘I/O FORMAT’ fi eld. Press the
UP
or
DOWN
Button to select the desired format.
Press
ENTER
. Press
PAGE
to return to the page of
your choice.
Heading Page
The eTrex Summit will automatically switch between
the Electronic Compass and GPS to determine your head-
ing.
The eTrex Summit needs to be held level for the Elec-
tronic Compass to provide an accurate heading. When
mounting the eTrex Summit in a car or on a cycle, the
unit will need to be tilted in order to see the display,
making the compass less accurate. eTrex Summit will
switch over, using GPS to track your heading when you
exceed 10 miles per hour. When you slow down, you can
press and hold the
PAGE
Button to switch back to using
the Electronic Compass.
While mounted in a car or on a
cycle the eTrex Summit will be
tilted enough for the Electronic
Compass to become inaccu-
rate. The eTrex Summit will
automatically switch to a GPS
heading when you exceed 10
mph. To switch back to the
compass press and hold the
PAGE
key or wait 90 seconds
after slowing below 10
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