190-00879-08
GPS 18x Technical Specifications
Rev. B
Page 6
1.6.2.5
Environmental Characteristics
•
Operating Temperature:
-30°C to +80°C (-22°F to +176°F)
•
Storage Temperature:
-40°C to +90°C (-40°F to +194°F)
1.6.3
GPS Performance
1.6.3.1
Receiver
Enabled
®
GPS receiver continuously tracks and uses multiple satellites to compute and update your position.
1.6.3.2
Acquisition Times
•
Reacquisition:
Less than 2 seconds
•
Hot:
Approx. 1 second (all data known)
•
Warm:
Approx. 38 seconds (initial position, time, and almanac known; ephemeris unknown)
•
Cold:
Approx.
45
seconds
1.6.3.3
Update Rate
•
GPS 18x USB, PC, and LVC:
1 record per second
•
GPS 18x-5Hz:
5 records per second
1.6.3.4
Accuracy
•
GPS Standard Positioning Service (SPS)
Position:
< 15 meters, 95% typical
Velocity:
0.1 knot RMS steady state
•
WAAS
Position:
< 3 meters, 95% typical
Velocity:
0.1 knot RMS steady state
•
Measurement Pulse Output Time: ±1 microsecond at rising edge of the pulse
•
Dynamics: 999 knots velocity (only limited at altitude greater than 60,000 feet), 2g dynamics
1.6.4
Interfaces
1.6.4.1
GPS 18x Electrical Characteristics
•
GPS 18x USB: USB 2.0 full-speed protocol compatible, as well as USB 1.1 full-speed protocol.
•
GPS 18x PC and LVC: TIA-232-F (RS-232) compatible asynchronous receiver. Default setting is 4800
baud.
•
GPS 18x-5Hz:
TIA-232-F (RS-232) compatible asynchronous receiver. Default setting is 19200 baud.
1.6.4.2
Garmin Interface and Garmin USB Protocol
Refer to the
Garmin Device Interface Specification
found in the Garmin Device Interface SDK for information
about the Garmin Interface and the Garmin USB Protocol. At the time of this printing, this document is located on
the Garmin Web site at:
www.garmin.com/support/commProtocol.html.
See
Appendix B: Garmin Binary Output Format
for additional information concerning access to binary data from
the GPS 18x USB.
