u-blox LEA-5 Series - Page 45

LEA-5, NEO-5, TIM-5H - Hardware Integration Manual
GPS.G5-MS5-09027-A2 Released Design-in
Page 45 of 68
Abbreviation
Description
AC
Antenna Control (e.g. the antenna will be switched on/ off controlled by the GPS receiver)
SD
Short Circuit Detection Enabled
OD
Open Circuit Detection Enabled
PdoS
Power Down on short
Table 11: Active Antenna Supervisor Message on startup (UBX binary protocol)
To activate the antenna supervisor use the UBX-CFG-ANT message. For further information refer to the
u-blox 5 Receiver Description including Protocol Specification [2].
Similar to the antenna supervisor configuration, the status of the antenna supervisor will be reported in a NMEA
($GPTXT) or UBX (INF-NOTICE) message at start-up and on every change.
Message
Description
ANTSTATUS=DONTKNOW
Active antenna supervisor is not configured and deactivated.
ANTSTATUS=OK
Active antenna connected and powered
ANTSTATUS=SHORT
Antenna short
ANTSTATUS=OPEN
Antenna not connected or antenna defective
Table 12: Active antenna supervisor message on startup (NMEA protocol)
The open circuit supervisor circuitry shown in Figure 37 has a quiescent current of approximately 2mA.
This current can be reduced with an advanced circuitry such as shown in Figure 36.