[Dr_C]

Thanks Drifter - it’s all working surprisingly well, so far, both the wireless hub and the observation method using the 3GHz spectrum analyser.

The setup I used picked-up the wireless signals ‘off air’ using a small antenna on the input hence the relatively high level of background noise - especially towards the right side of the photo. The spectrum is of course shared with other devices such as blutooth and WiFi devices which all have potential to create channel noise.

As per the photo the analyser is continuously scanning from 2.401GHz to 2.413GHz in small increments.

The wireless hub is frequency hopping and only sending out very short ESB payloads. Consequently the signal capture process is hit-or-miss depending on whether the hub is transmitting on the same frequency as the current value of the spectrum analyser’s frequency as the scan/sweep progresses. Hence the statistical nature of the profiles shown. I should also add, the analyser is set to ‘hold peak value’ mode so the scan pattern builds up across multiple scans/sweeps.

Hope the above makes sense :)

c