Hi Neil,
Strange result. Appreciate you don’t require assistance, but would like to understand what is going on here, so need to have a think about this. Normally with no antennas I would expect a very low strength received signal (if any at all), which would be unlikely to trigger this type of alert. On the face of it, it sounds like they must be triggered by your own transponder, but not sure why. Did you still have coax feeders attached, or just the ‘Bare PAW’ ?
Regards
Peter