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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. You can enter the beacon frequency 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 temporarily 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.
System Page
The System Page shows you the eTrex’s current
software version and allows you to choose from three
modes of operation:
• Normal
• Battery Save
• Demonstration (DEMO)
Normal Mode
The GPS receiver is turned on all the time when it’s in
‘NORMAL’ mode. The normal mode is more sensitive to
sudden turns or change of speed/acceleration.
The ‘SYSTEM’ Page
shows you the software
version, allowing you to
update from GARMIN’S
web site.
A ‘BATTERY LOW’
message appears at the
bottom of every page
when there are
approximately ten
minutes of battery life
left (when using alkaline
batteries).
Reference
System Page
etrex manual.indd 10/12/00, 11:17 AM38