On Mon, Jul 28, 2008 at 11:34:01AM -0700, isaacgerg wrote:
>
> Eric,
> I have answered you questions inline:
>
> >>Are you seeing any over or underruns ("uOuO" or "uUuU") on the console?
> Occasionally, I see "u0" on the rx. But, even if i post process data
> offline, i still get the "flip"
>
> >> How wide is the signal you're trying to send?
> The rx interp is 256 and the tx interp is 512 giving a BW=250Khz. Since I
> am just sending random samples, I am using the whole band.
>
> >> What interpolation and decimation values are you using?
> See above.
>
> >> Try sending it at 10MHz.
> I did. The Rx cannot see my signal anymore; a PSD confirms this. Not
> sure why.. maybe an antenna issue.
>
> >> What version of GNU Radio are you using?
> I do not know what version the radios are. How do i find this out? The
> serial numbers are 1460 and 1461 and there is a date on the sticker that
> says 4/16/07.
Sorry, not the board, the GNU Radio software you're running on the host.
There was a problem in the FPGA code that was fixed quite a while
ago (6 or 9 months) where there was some kind of flipping.
> >> Have you isolated the problem to the Tx or Rx path?
> I believe it is in the Rx path. The TX path simply reads up a data file
> of samples and sends them to the USRP... very simple. The RX path receives
> the data and attempts to correlate on the samples I sent. However, I am
> noticing that the correlation is postive, then negative, and continues this
> way alternating about every 1000 samples or so.
>
> Isaac
Eric
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