Rainbow Electronics UC864 - Manual (Page 14)

UC864-E/G Product Description
80281ST10034a Rev. 1 - 08/08/2008
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 14 of 36
• Supports 12-Channel GPS L1 1575.42 MHz
• Accuracy < 3m (CEP68 : 68% Circular Error Probable )
• GPS NMEA 0183 output format
• Date WGS-84
• Dedicated GPS AT commands
• Low power consumption
2.8.1 GPS Sensitivity*
Time to first fix
Hot start Autonomous < 1s
Warm start Autonomous < 32s
Cold start Autonomous < 40s
Sensitivity
Tracking Up to -157 dBm
* NOTE: Performance will vary depending on environment, antenna type, signal conditions, satellite
geometry, and handset implementation.
2.8.2 GPS Consumption*
The typical current consumption of the GPS part of the
UC864-G module is:
UC864-G
Mode Average(mA) Mode description
IDLE mode with GPS ON full power mode
Stand by mode; no call in progress; GPS ON
AT+CFUN=1
WCDMA 145
GSM 104
AT+CFUN=4
WCDMA 104
GSM 104
* Except external active GPS antenna
2.8.3 GPS Driving
The GPS functions are driven from the Base Band processor trough a dedicated AT command set
available in a separate specification.