Re: [Discuss-gnuradio] TVRX2 with USRP1 and serial < 500

[Mike Jameson]

Hi Jason,

The only schematics I can find for the USRP1 are at the following link:

http://code.ettus.com/redmine/ettus/documents/11 ( http://code.ettus.com/redmine/ettus/attachments/11/usrp1.pdf )

On this PDF I cannot find anything that mentions the word 'clock_rx_p' or 'clock_tx_p' which are the pins I have to find.

Is there a USRP1 rev3 schematic buried deep in your archives somewhere that I could take a look at?

Thanks,

Mike
M0MIK

On 17 July 2011 17:16, Jason Abele <address@hidden> wrote:

On Sun, Jul 17, 2011 at 8:52 AM, Mike Jameson <address@hidden> wrote:
> Hi Guys,
>
> I have just received my shiny new TVRX2 and have been trying to get it to
> work with the UHD and my USRP1 (serial < 500). My DBSRX works fine with this
> setup.
>
> The symptoms look similar to the issue I had with my WBX which I think
> required a non-existent clock on my old USRP1.  I have spurious signals
> drifting across the FFT and there is no intelligible audio from the static.
> This remains unchanged when tuning to super strong pager frequencies and the
> FM broadcast band.
>
> Is there anything I can do to get this beauty working? I am running Ubuntu
> 11.04 x64 with the latest GIT code for the UHD and Gnu Radio.
>

The TVRX2 requires a clock from the USRP, which USRP < 500 do not
provide, same problem as WBX

Someone posted instructions here for adding the necessary clock:

http://gnuradio.org/redmine/projects/gnuradio/wiki/USRPSerialBelow500

Jason