42
Appendix A
Specifications
Physical
Case:
Fully-gasketed, high-impact plastic alloy, waterproof to IPX7 standards
(waterproof to 1 meter for 30 minutes)
Size:
4.4”H x 2”W x 1.2”D
Weight:
Approx. 5.3 ounces (150g) w/batteries
Temperature Range:
5° to 158°F (-15° to 70°C)
3
(operating)
P
erformance
Receiver:
Differential-ready, 12 parallel channel
Acquisition time:
Approx. 15 seconds (warm start)
Approx. 45 seconds (cold start)
Approx. 5 minutes (First Time/AutoLocate™)
Update Rate:
1/second, continuous
GPS Accuracy:
<15 meters (49 ft) RMS
1
DGPS (USCG) Accuracy:
1-5 meters (3-15 ft) with DGPS corrections
2
DGPS (WAAS) Accuracy:
3 meters (10ft) 95% typical with DGPS corrections
Velocity Accuracy:
0.1 knot RMS steady state
Dynamics:
Performs to specifications to 6 g’s
Interfaces:
NMEA 0183 (versions 2.00-3.0), RTCM 104 (for DGPS corrections) and
RS-232 for PC interface
Antenna:
Built-In
Power
Input:
Two 1.5-volt AA batteries
4
Battery Life:
Up to 16 hours of typical use
Specifications subject to change without notice.
1
Subject to accuracy degradation to 100m 2DRMS under the
U.S. DOD Selective Availability program.
2
With optional Garmin Differential Beacon Receiver Input
(such as Garmin GBR 21 or 23).
3
Subject to proper user calibration.
4
The temperature rating for the eTrex may exceed the usable
range of some batteries. Alkaline batteries can rupture at
high temperatures. External power can only be applied using
the Garmin Auto Power Adapter (P/N 010-10203-00) or PC
Interface Cable with Auto Power Adapter P/N 010-10268-00;
this cable contains a voltage regulator). Modifications or other
applications will void the product warranty.
5
Alkaline batteries lose a significant amount of their capacity
as temperature decreases. Use lithium batteries when operat-
ing the eTrex in below-freezing conditions. Extensive use of
screen backlighting will drastically reduce battery life.
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