[amsat-bb] Re: 2 Meter TV Interference

Gordon JC Pearce gordonjcp at gjcp.net
Wed Dec 7 13:48:26 PST 2011

On Wed, 07 Dec 2011 09:20:19 -0500
Glenn Little WB4UIV <glennmaillist at bellsouth.net> wrote:

> 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.

Even TV frontends that *do* use SDR use extensive filtering and a downconverter to go from the UHF input to a fairly "normal" 40MHz-ish IF.

> 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.

I don't see why you couldn't.  You just need to get rid of that grubby little splitter, and fit a highpass filter to keep the VHF signal out.  I do this all the time.

Gordon JC Pearce MM0YEQ <gordonjcp at gjcp.net>

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