Re: [Discuss-gnuradio] USRP spike

[Brian Padalino]

Hi Naveen,

On Mon, Aug 16, 2010 at 2:05 PM, naveen nischal
<address@hidden> wrote:
>
> Brain,
> Thanks for the reply. We have tried terminating the antenna input, the spike
> still shows up. We also tried tuning a bit away from the signal of interest
> and mixing the signal of interest to baseband but it doesn't seem to help,
> the spike just follows the signal all over.

I expected the DC offset to still show up after terminating the
antenna input, but I don't understand how the spike always follows the
signal unless something is actually there.

>From your example, you have 435.300MHz as your center frequency which
"appears" to have a large signal present.

If you tune to 437.300MHz, do you see a strong signal at 435.300MHz
still - or does it "follow" your center tuning to 437.300MHz and
435.300MHz is "in the noise floor"?

> Thanks,
> Naveen

Brian