In my room all my test signals are contaminated by a soft peak at about 1.5 MHz. When I connect a simple, 1-meter long wire to a scope I see damped sine waves at this frequency with a decay period of a few cycles, recurring at random times. I suspect this is caused by our CIAT air conditionning system.
Does anybody has trouble with this brand of air condionners?
I brought a small AM radio receiver. I hear sort a white noise in the audible domain, same in the 1.3 to 1.7 MHz domain. It seams to increase when I get closer to the air conditioner.
amdx snipped-for-privacy@knology.net wrote in news:sm3auc$56i$ snipped-for-privacy@dont-email.me:
Turn off everything in the house. Except the analyzer of course. Then if it is no longer present, one by one, turn on those items you previously de-energized until you spot it and hence the culprit. If it is still there after turning everything off, it is external to your abode and running gear. Could be a neighbor's microwave.
I worked on a system some years ago for a group I can't name. Cell phones used to be analog voice with digital signalling, not encrypted in any way. Anyone with an analog receiver could listen in to phone calls. While testing the system I recall one conversation that went on for some time. I only listened to it periodically as required to verify voice quality and hang up detection, but it was easy to tell someone was being dumped and was extremely unhappy about it. I think the call lasted over an hour. Most cell calls at that time were no more than a minute, "Hi, don't forget the hamburg rolls and pick up some milk." I don't recall the price, but cell phones were far from free calls and charge 'em for the data! lol, there was no data to charge them for.
We actually had a cell base station to test with. That was pretty cool.
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