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May 2nd 06, 08:51 PM posted to rec.radio.shortwave

Telamon

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Transmitter splatter

In article ,
(Mark Zenier) wrote:

In article ,
David wrote:
On Sat, 29 Apr 2006 19:48:31 GMT, (Mark Zenier)
wrote:
In article
,
Telamon wrote:

There is another station near but not on channel that plays havoc with
the BBC on 7160. The carrier off something like 1 KHz is the main
problem. I again have to listen sync selective sideband on 7160 or use
the notch filter.

I think that's the second harmonic of the TV color burst frequency.
A lot of consumer electronics run their micro/TV video chips on
7.15909, or 14.31818 MHz resonators or xtals. And since the damn things
are always on to "listen" for remote control commands...

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)

3.579?

Yea, but they run the microprocessor/video processing combo chip on a
multiple of that to simplify the chroma processing. (Or maybe they're
just cheaper). And anything digital, like the satellite systems
the Mon wrote about another post or DVD players, will have a video
display generation hardware that uses the color burst frequency in there
somewhere, if it's designed to feed an older TV set/analog video.

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)

You are probably right about the source since it is prolific. Digital
chips make things worse by using square waves and the resulting increase
in odd harmonics.

--
Telamon
Ventura, California

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