Last night I could not get any of our three Fox TV stations. We were having a cold front come in from the west. One station is 68 mile west, 1 MW, 1300 foot tower. One is 45 miles NW, 1 MW, 800 foot tower, over a small hill. One is 23 miles east, 300 kW, 800 foot tower, over a small hill. All are usually receivable with small (3-6 dB) signal margin. I have a permanently installed spectrum analyzer. Last night the two westerly stations were too weak, apparently due to the signal being less-than-usually bent down by atmospheric refraction. The easterly one was a bit (3 db) higher than normal. BUT ... about 1.5 MHz below the top of the channel was an interfering apparently CW signal. It was about 6 dB higher than the ATSC carrier. I could not tell if it were modulated; even at 30 kHZ BW it seemed to be pretty much CW, at 3 kHZ it was too noisy to tell. WTF????? !@$@#$^#^???????????? What is a CW carrier doing at that frequency? This is Ch. 26. There is a digital station on 25 which is 120 miles east of us and sometimes comes in, it was in nicely last night, but unreceiveable because of a co-channel ordinary NTSC. But the interference on Fox 26 was NOT NTSC! What was it? I worried about harmonics in my preamp, but the interference was there with the antenna directly into the spectrum analyzer. Doug McDonald ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways:- Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org
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