Re: [Discuss-gnuradio] dual coherent channel rtl_sdr

[juha]

I use R820T. It has nonzero IF and the noise is relatively flat. 

The clock looks sawtooth-like on the scope.

Juha

On 26.9.2013, at 18.32, Heath Hunnicutt <address@hidden> wrote:

> Juha,
> 
> Ordinarily, I would choose to feed a clock into xtal_in, this seems logical. 
> However check out the Elonics patent:
> 
> http://www.uspto.gov/web/patents/patog/week49/OG/html/1385-1/US08324978-20121204.html
> 
> The main thing to note is that square-wave clock input should be fed to
> xtal_in for the elonics chip.
> 
> If you read that patent, it may give you some ideas about feeding a clock to
> xtal_in of other chips.  Maybe other chips will also expect a sawtooth in
> the linear region of voltage swing, not rail-to-rail square wave.  Note the
> comments in that patent on jitter at square wave, etc.,
> 
> Nobody on this thread has stated whether they are using e4000 or r820.  That
> would probably be helpful.
> 
> 
> 
> 
> --
> View this message in context: 
> http://gnuradio.4.n7.nabble.com/dual-coherent-channel-rtl-sdr-tp43784p43851.html
> Sent from the GnuRadio mailing list archive at Nabble.com.
> 
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio