Re: [Discuss-gnuradio] Basic Tx to demodulated RCA audio?

[Eric Blossom]

On Thu, Aug 18, 2005 at 01:37:16PM -0700, Chris Pezzee wrote:
> I have my USRP capturing video/audio from the TVRX daughter card, then
> demodulating the audio to baseband and playing to sound card and
> dumping to disk.  I can play back the captured audio to the soundcard.
> Yay!
> 
> I also read about a 'hole' in the Basic Tx frequency output, but I don't
> know if this will be a problem for me.  If I want to output 20-20kHz
> signals, will they be filtered at the TX_A output?

The RF transformer on the Basic TX doesn't pass much below 100 kHz. 
It was designed for RF, not audio, so is unlikely to work for you.  
It will however pass RF signals up to several hundred MHz.

> If this is not a problem, I should be able to  produce a stereo output by
> using TX_A and TX_B for Left and Right, correct?
> 
> Eventually, I hope to capture/create NTSC/PAL signals and replay them
> through an external modulator for television equipment testing.

That should work fine.

> 
> BTW, I mounted my USRP in a Velleman G758 case, but the internal mounting
> hardware wouldn't quite fit the USRP, so I had a little drill work to do.
> It works ok, and now I don't have to worry about kids and cat effects.

Thanks for the info.

Eric