GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 15 of 60
GM862-GPS (3990250657)
GM862-GPS
4
(3990250689)
Operating current
70 mA
±20%, including 50 mA
for the GPS hardware and 20
mA for the antenna LNA
55mA, including 35mA GPS for
the GPS hardware and 20 mA
for the antenna LNA
2.8.1.3 GPS Driving
The GPS functions are driven from the GSM BB processor trough a dedicated AT command set
available in a separately specification.
2.8.1.4 GPS NMEA
The GPS data stream (NMEA 0183 format) is also available on the connector (pins 35 and 41 :
TX_GPS and RX_GPS) in RS232 format 8N1, 4800 bps (9600, 19200, 38400, and 57600 bps are
available too).
2.8.1.5 NMEA sentences
The following GPS sentences are available:
GGA
- Global positioning system fix data (provides 3D location and accuracy data)
VTG
–
Course over ground and ground speed
GSA
-
GPS DOP and active satellites
RMC
- Recommended Minimum Specific GPS Data
GLL
-
Geographic Latitude and Longitude
2.9
Supply voltage
The external power supply must be connected to VBATT signal (see Hardware User Guide) and must
fulfil the following requirements:
POWER SUPPLY
SW rel. 7.02.xx4 or
older
SW rel. 7.03.x00 or
newer
Nominal Supply Voltage
3.8 V
3.8 V
Max Supply Voltage
4.2 V
4.5 V
Supply voltage range
3.4 V - 4.2 V
3.22 V – 4.5 V
4
Operating current consumption has decreased for
30%
