PHD Guide Camera odd behaviour

[tomato]

I have a OAG with an ASI 120 mini guide cam running PHD2 with synchronised guiding using NINA. The other night the SNR value went from 270+ to 14 in about a second, PHD reported star mass change and the guide image looked like cloud had come over. However the scopes were pointing through the aperture and the sky was clear. I stopped guiding, disconnected and reconnected the camera and all was OK. Last night it did the same thing again about 10 mins apart but fine after that. Note the camera is not losing connection, so it is not a dodgy USB lead, it is as if the signal being detected is being massively reduced. The only other thing I noted was it happened just before or after a dither operation. Any thoughts?

[Tomatobro]

I bet it's that USB C connector on the camera. I fold back the ribbon cable and put a tie wrap round the camera body to take the strain off the usb connector.

 

[michael8554]

Only way to be sure is to look at the PHD2 Guidelog and DebugLog.

Michael

[tomato]

I have a Velcro wrap around the camera to help secure the lead but it is a bit iffy. But could a loose usb plug create a low signal scenario from the camera?