Re: [Discuss-gnuradio] TVRX2 and GRC

On Oct 3, 2014, at 7:30 PM, Marcus D. Leech wrote:

If you put your flow-graph itself (.grc file) somewhere, or attach it, we can take a better look.

What kind of comptuer?  (OS, CPU/MEM specifics, etc).

--   Marcus Leech  Principal Investigator  Shirleys Bay Radio Astronomy Consortium  http://www.sbrac.org  

Hi Marcus,

    Thanks.   The .grc file is attached.      Other details:   

    o Intel(R) Core(TM)2 Duo CPU     E8400  @ 3.00GHz

    o Memory 3GB
    o OS 14.1 Ubuntu

Cheers,

Dan

Well, for one, your FFT block disagrees rather dramatically with your UHD source block about the same rate, which you've selected as 10Msps. I'd
  go for 6.25Msps, and make certain that your source block and FFT block agree on sample rate.  And if you're really wanting the 1.7MHz that
  you've programmed in the source to 1.7MHz, you don't need more than about 2Msps sampling rate.  Very few daughtercards have variable
  analog bandwidth, the TVRX2, DBSRX2, and perhaps XCVR are the only ones with variable analog baseband/IF bandwidth.

--   Marcus Leech  Principal Investigator  Shirleys Bay Radio Astronomy Consortium  http://www.sbrac.org