Re: [Discuss-gnuradio] Using UHD with one USRP and trying to verify that Im sending data

[Isaac Gerg]

Yes, I was sending all 1000 for each sample. I completely forgot that the DC component may be wiped.  However, I also tried sending  gaussian noise (mu=0, sig=1)*100 and still didnt see the signal.

Im going to take a closer look at the interface to determine which daughterboard and output is used (A or B) and also try to rx the signal with another USRP.

Isaac

On Tue, Jan 25, 2011 at 6:59 PM, John Orlando <address@hidden> wrote:

On Tue, Jan 25, 2011 at 5:53 PM, Isaac Gerg <address@hidden> wrote:
> I have on USRP and I'm simultaneously sending an receiving data from it
> using the UHD interface.  Im trying to determine if I am sending my samples
> at all.  I am sending all 100's using COMPLEX_FLOAT32 interface.  I have a
> basixRX and basicTX boards.  Both are hooked up on the A side of the USRP.
> I have a cable connecting TX-A to RX-A with an attenuator in the middle.  I
> transmit but do not seem to see my signal.  Here is a dump from my program.

When you say you're sending "all 100's using COMPLEX_FLOAT32
interface", what exactly do you mean?  Do you mean the value 100 in
decimal repeatedly?  If so, this is a DC signal with no frequency
content, and DC offset correction could be wiping it out.  If not, can
you elaborate more on the data values that you're sending?

--
John Orlando
CEO/System Architect
Epiq Solutions
www.epiq-solutions.com