Thanks for ideas Jeff.
I have experienced ping-pong many times in the past; this is different. It is like random noise blanketing the PLC signals.
- My Monteray signal analyzer shows a steady 90-100mv noise floor, which IIRC is perfectly fine for here. Nothing showing while the XTRB is flashing away.
- My Elk automation signal meter shows nothing.
- In trying to get access to cm15a with ahp, I saw F2 list had about 10 C3/C5/C7 RF rcvd signals, but I think they were accurate as I was walking thru the rooms they are associated with. Nothing else. In the past, ping-pong here shows up clearly in the history list.
A friend recently gave me a box of about 30 X10 modules and things, mostly new, that he has had for 20-30 years; I DID put batteries in the two HR12a remotes, and neither worked although they flashed the light - I think they are too far off frequency. I figured no led, no output so left batteries in them on the workbench. Just removed them to see next time I test. I need to get an ahp running I can plug into it at the offending location ; then I could easily see in history...
I do have some TM751's around; perhaps I should unplug them for test - thanks.
The cm15a has no program in it and XTRB continues same random flashing every 1 sec or so with USB cable unplugged.
I am getting by for now by unplugging the cm15a from the XTRB outlet and instead plugging it into an outlet 5 feet away. This should give me some clue but I do not see it yet other than guessing the noise/signal issue is on the other side of the 220...
I plan to try to get a working copy of AHP going to replug into the XTRB in the next couple days to continuue testing. Thanks again for your help!