[amsat-bb] Re: 2 Meter TV Interference

[Glenn Little WB4UIV]

This is probably front end overload on a TV without a front end.
Can you spell SDR?
The TV may now be using this technology.

A digital TV MUST receive all of the packets to display a useable picture.
If it looses enough packets, it will not decode anything.

You probably cannot fix the problem with this TV.

73
Glenn
WB4UIV

At 10:17 PM 12/6/2011, Wyatt Dirks wrote:










>Just recently I have been having troubles with a neighbor while I am 
>working the FM satellites(SO-50 and AO-27). The setup I am currently 
>using is my mobile setup because I am unable to put a base station 
>up for many reasons. I am using a FT8900 with 50 watts out into a 
>1/4 wave or 1/2 Larson mobile antenna.The 1/4 wave is mounted 
>permanently via a hole in the roof of my truck an the 1/2 wave is 
>mounted on a mount opposite the factory installed FM/AM radio whip. 
>It doesn't seem to matter what antenna I use for the problem to 
>occur. Then I use either the arrow antenna or my cju for the downlink.
>
>The problem occurs while I am transmitting. The neighbor says that 
>his tv receives the interference in that the picture is disturbed 
>and sometimes cuts out completely. He is getting his tv from hdtv 
>over the air. He has an antenna in the attic that goes to a powered 
>splitter which then goes to several tvs. That is about all i know on 
>his setup but I do know that if he cuts the power to the splitter he 
>receives nothing. Also the problem seems to be on every channel.
>
>Today I had another local ham over at the request of the neighbor 
>and his mobile Kenwood radio did the same thing to the neighbors tv 
>when he transmitted on 2 meter with 50 watts out. He also 
>recommended that they get a filter. I did not see the specs on the 
>filter nor do I know what bandwidth it was for.
>
>If anyone has any ideas on what would solve this problem and could 
>share that would be great.
>
>Catch you on the birds
>
>Wyatt AC0RA
> 
>
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