User's Manual

PH8/PH8-P Hardware Interface Overview
5.2 GPS Antenna Interface
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PH8_PH8-P_HD_v02.000 Page 34 of 46 2011-10-21
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5.2 GPS Antenna Interface
In addition to the RF antenna interface PH8/PH8-P also has a GPS antenna interface. See
Section 6.1 to find out where the GPS antenna connector is located. The GPS antenna instal-
lation and connector are the same as for the RF antenna interface (see Section 5.1.1 and Sec-
tion 5.1.2).
It is possible to connect active or passive GPS antennas. In either case they must have 50 Ohm
impedance. The simultaneous operation of GSM and GPS has been implemented.
Active 3V GPS antennas can be supplied via the GPS antenna interface, if the supply voltage
is switched on. This is done by AT command: AT^SGPSC="Power/Antenna" to configure the
use of an active GPS antenna and AT^SGPSC="Engine" to start the GPS receiver (for com-
mand details see [1]). The available current is limited to prevent short circuits.