Data Sheet

QPRO Technical Data Sheet
Document 1137-0901, REV K 15
Satellite
Connector
GPS
Connector
GSM
Connector
Figure 2-3, QPRO Connectors
3 Modem Wireless Communication
3.1 Global Positioning System (GPS)
• Internal GPS
o Performance
 22-channel GPS chipset.
 Rapid Time-To-First-Fix (TTFF) 60 seconds from a cold start, 25 seconds from
warm start, 2 seconds from hot start (depending on antenna and signal strength)
 Accuracy within 2.5 meters
 Updates raw location data every second
 Sensitivity: -160 dBm for tracking and -146 dBm for acquisition
o Features
 Antenna detection - The GPS detection is a current measurement based result. The
typical detection threshold is 3mA for an OPEN/OK and greater than 130mA for a
SHORT. A measured current of less than 3mA will result in an OPEN. A measured
current greater than 6mA but less than 130mA will result in an OK. A measurement
greater than 130mA will result in a SHORT. Note that the thresholds are typical and
will vary +/- 2mA low end and +/- 5mA high end.
 GPS Antenna Current: 6mA to 30mA.
 Utilizes a passive or active 3.0-3.5VDC (5-30 mA nominal) GPS antenna (Active
recommended).
 Active antenna with 20-30 dB gain @ 3.3 VDC. Max noise figure 1.5 dB
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