TVRX2 with USRP1 and serial < 500

GNU Radio
1

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.

Thanks,

Mike
M0MIK

2

On Sun, Jul 17, 2011 at 8:52 AM, Mike J. [email protected]
wrote:

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

3

Hi Jason,

Rite then time to get soldering! :slight_smile:

Thanks for your rapid response.

Cheers,

Mike
M0MIK

4

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

5

Unfortunately due to hardware compatibility issues, the TVRX2, DBSRX2
and SBX will not work on USRP1 with serial < 500

–
Principal Investigator
Shirleys Bay Radio
Astronomy Consortium

6

Hi Marcus,

Thanks for getting back to me. Shame about the compatibility! :frowning:

Mike