[mythtv-users] Decoding a UHF remote

[Michael T. Dean]

On 06/25/2007 01:35 PM, David Brodbeck wrote:
> On Jun 25, 2007, at 10:02 AM, Jeremy Gillick wrote:
>> I just recently got DishNetwork installed at my house.  The set top  
>> box that comes with it has an IR receiver for tuner 2, and a UHF  
>> remote receiver for tuner 1.  I've got my mythtv communicating with  
>> the IR tuner just fine but keep wondering how I can reverse  
>> engineer the UHF receiver.  I've never done something like this  
>> before, but it sounds like fun.  Does anybody know how I could start?
>>     
> This is a tall order and requires some expensive equipment,  
> normally.  Spectrum analyzers and the like.
>
> However, if you're brave, you can try taking the remote apart.  If  
> you can identify what chips are used and trace out some of the  
> circuitry, you'll know what modulation scheme they're using and your  
> task will be much easier.
>
> Unfortunately, often the chips in such devices are "house marked."   
> They're probably standard items, but the part numbers are often  
> unique to a particular manufacturer and aren't something you can  
> cross-reference.

Out of curiosity, have you identified a source for an RF transmitter
that can be hooked to/controlled by the computer?

Mike