Telit Wireless Solutions GE863 Manuel D’Utilisation

GE863-GPS Software User Guide

1vv0300724 Rev. 2 - 24/01/07

5.6.3 GPS ANTENNA MANAGEMENT

The GPS receiver needs an active antenna. This antenna could be supplied by the module.
By default the antenna supply is set to ON (the provided voltage is related to VBATT so the GPS
antenna have to accept a range of supply voltage from 3.4 to 4.2V DC)

With the AT$GPSAT command is possible to define this setting.

The syntax is AT$GPSAT=<type>

Parameter:
<type>
0 - GPS Antenna not supplied by the module
1 - GPS Antenna supplied by the module (default)

NOTE: if current <type> is 0, either $GPSAV and $GPSAI have no meaning.

5.6.3.1 GPS Antenna Current and Voltage Readout

With the commands AT$GPSAV? and AT$GPSAI? is possible to measure the supply voltage and
consumption of the GPS antenna.

The answer is (in the case of 3.8V dc measurement)

$GPSAV:3800
OK

For the current with the commnand

AT$GPSAI? The answer is :

<value>[, <status>]

<value> the measured current in mA
<status>

0 GPS antenna OK

GPS antenna consumption out of the limits

STATUS is available only if the SW antenna protection is activated.

$GPSAI:040,0

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