Rainbow Electronics GE863-GPS low power - Manual (Page 109)

GE863-GPS Software User Guide
1vv0300724 Rev. 3 - 05/07/07
Reproduction forbidden w ithout Telit Communications S.p.A. w ritten authorization - All Rights Reserved page 109 of 122
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=
Parameter:
0 - GPS Antenna not supplied by the module
1 - GPS Antenna supplied by the module (default)
NOTE: if current 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)
$GPSAV:3800
OK
For the current with the commnand
AT$GPSA I? The answer is :
[, ]
the measured current in mA
(1
0 GPS antenna OK
1 GPS antenna consumption out of the limits
STATUS is available only if the SW antenna protection is activated.
$GPSAI:040,0
OK