On Sat, Mar 10, 2012 at 6:28 AM, Orkhan
Badirkhanli <
address@hidden>
wrote:
> Andrew
>
> Sorry for the late reply. I am using SBX
daughterboard.
>
> The attachments I included earlier are
inaccurate and seems like I was see
> that output because I was terminating uhd_fft
file using ctrl+c
>
> Right now I have my noise level at -110dB and
I can see different carriers.
> The only ambiguity I am facing is that as I
change by center frequency by
> 0.0001GHz I see some carriers gone and
different ones emerged at various
> frequencies.
>
> This is happening in every band.
>
>
> On Thu, Mar 8, 2012 at 7:24 PM, Andrew Davis
<
address@hidden>
> wrote:
>>
>> The thing in the center is caused by a
lot of things, like IQ
>> imbalances and the distribution of noise
towards zero etc. We all get
>> it when the gain is high. Do you have
something you are trying to
>> detect? Do you have an antenna connected
to the right port? What
>> front-end board are you using? Try 100MHz
and look at some local radio
>> stations.
>>
>> On Thu, Mar 8, 2012 at 8:47 AM, Orkhan
Badirkhanli <
address@hidden>
>> wrote:
>> > Hello
>> >
>> > I've just successully installed
gnuradio and connected my new USRP n210.
>> > I
>> > run uhd_fft.py to test my hardware
and it all works well, I activity in
>> > the
>> > spectrum.
>> >
>> > The thing is, whatever I set the
center frequency, all I see is a
>> > carrier at
>> > that center frequence at -50dB and
"noise" at other frequencies at
>> > -70dB. I
>> > have included 2 screenshots with
center frequencies of 2.4G and 2.4001G,
>> > the
>> > situation is the same in both of
them.
>> >
>> > I thing there is something really
wrong with this. Besides, I remember a
>> > few
>> > time when I ran uhd_fft.py file, I
saw noise at -110dB and several
>> > carriers
>> > at different frequencies. But that
carrier at center frequency was there
>> > too.
>> >
>> > I appreciate any help
>> >
>> > Thanks
>> >
>> > --
>> > Orkhan
>> >
>> >
_______________________________________________
>> > Discuss-gnuradio mailing list
>> >
address@hidden
>> >
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>> >
>
>
>
>
> --
> Orkhan