Specifications

RF Specifications
Rev 6 Mar.13 Proprietary and Confidential - Contents subject to change 47
GPS specifications
Note: For detailed electrical performance criteria, see Recommended GPS antenna speci-
fications on page 67.
Table 5-9: GPS specifications
1
1. All values are preliminary.
Parameter/feature Description
Satellite channels 12 channel, continuous tracking
Protocols NMEA 0183 V3.0
Acquisition time
Hot start: 1 s
Warm start: 29 s
Cold start: 32 s
Accuracy
Horizontal: < 2 m (50%); < 5 m (90%)
Altitude: < 4 m (50%); < 8 m (90%)
Velocity: < 0.2 m/s
Sensitivity
Tracking
2
: -161 dBm
Acquisition
3
(Assisted): -158 dBm
Acquisition (Standalone): -145 dBm
2. Tracking sensitivity is the lowest GPS signal level for which the device can still detect an
in-view satellite 98% of the time when in sequential tracking mode.
3. Acquisition sensitivity is the lowest GPS signal level for which the device can still detect
an in-view satellite 50% of the time.
Operational limits
Altitude <6000 m or velocity <100 m/s
(Either limit may be exceeded, but not both.)