I don't want my sampling rate to be 25 kHz. My sampling rate is already
195312 Hz which is I think the minimum sampling rate for X310.
What I want is to filter out the frequencies which are at least 25 kHz away
from my center frequency. For example I don't want to see a transmission
which is 50 kHz away from my center frequency. Is it possible? How does the
"bandwidth" parameter in UHD Source Block in GNURadio affect the captured
2018-05-14 12:19 GMT+03:00 Derek Kozel <derek.ko...@ettus.com>:
> Hello Ali,
> To extend what Marcus has said, here is a link to the UHD manual page
> about sample rates.
> On Mon, May 14, 2018 at 8:54 AM, Müller, Marcus (CEL) <muel...@kit.edu>
>> Hi Ali,
>> just like the console will tell you, 25 kS/s is simply impossible with
>> an X310; instead, the minimum possible rate was used.
>> You should probably just configure your X310 to get you e.g. 500 kS/s,
>> and then resample in digital domain. If you're hesitant to design your
>> own decimating filter, use the "rational resampler" block and configure
>> it to decimate by (500/25)=20.
>> Best regards,
>> On Mon, 2018-05-14 at 10:18 +0300, Ali wrote:
>> > Hi to all,
>> > I am using GNURadio to control an X310. I want to get IQ samples for
>> only 25 kHz bandwidth.
>> > When I wrote 25 kHz to the bandwidth line in UHD-Source block in
>> GNURadio, I still see the signals at 50 kHz or 75 kHz away from the center.
>> My sampling rate is 195312 Hz. When checked in MATLAB, the signals are
>> there. It looks like I cannot control the bandwidth with GNURadio.
>> > I suspected that there is not any DDC filter for this bandwidth. If it
>> is so, what is the minimum bandwidth for USRPs? Are the bandwidths that I
>> can use discrete? I am confused.
>> > Thanks in advance,
>> > Ali
>> > _______________________________________________
>> > Discuss-gnuradio mailing list
>> > discuss-gnura...@gnu.org
>> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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