LEA-6 / NEO-6 / MAX-6 - Hardware Integration Manual
UBX-14054794 Production Information Design-in
Page 46 of 85
No
Super-
vision
Active
Antenna
OK
Open
Circuit
detected
Short
Circuit
detected
Powerup
Events AADET0_N
User controlled events
Disable Supervision
Enable Supervision
Short Circuit
detected
Disable
Supervision
Antenna
connected
Short Circuit
detected
open circuit
detected, given
OCD enabled
Periodic
reconnection
attempts
Figure 45: State diagram of active antenna supervisor
Firmware supports an active antenna supervisor circuit, which is connected to the pin AADET_N. An example of
an open circuit detection circuit is shown in Figure 46 and Figure 47. High on AADET_N means that an external
antenna is not connected.
Short Circuit Detection (SCD)
A short circuit in the active antenna pulls V_ANT to ground. This is detected inside the u-blox 6 module and the
antenna supply voltage will be immediately shut down.
Antenna short detection (SCD) and control is enabled by default.
Open Circuit Detection (OCD)
Figure 46: Schematic of open circuit detection variant A (for exact pin orientation see data sheet)
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