Hi John, Thank you for your reply. We would like to create aliasing. This means that we should set ADC to sample at speed less than Nyquist rate. In our setting, we target RF front end to be 50MHz and ADC speed is 2MHz. The question is how to do it? We use some commands (as shown in my previous email) but seems not working as expected, i.e. RF front end bandwidth is still 2MHz.
Best, On Thu, Dec 28, 2017 at 9:24 PM, John Shields <[email protected]> wrote: > Hi Wahhab, > This is a fairly basic issue – the ‘bandwidth’ (if that > is really what you are really meaning) is related to the sample_rate by The > Nyquist Frequency > > https://en.wikipedia.org/wiki/ > Nyquist_frequency > > Kind Regards, > > John > > *From:* Wahhab Albazrqaoe via USRP-users <[email protected]> > *Sent:* Friday, December 29, 2017 3:04 PM > *To:* [email protected] > *Subject:* [USRP-users] Enable aliasing using USRP > > Dear All, > I have question about how to create aliasing using USRP. > Basically, I have USRP2 with SBX (with recent installations of GnuRadio > and UHD). > I would like to set the bandwidth of the RF front end to 50 MHz, and use > 2MHz of sampling rate (ADC speed). > I am using the following command: > sudo ./rx_samples_to_file --args addr=192.168.10.2 master_clock_rate=50e6 > --freq=2460e6 --bw=50e6 --rate 2e6 --gain=50 --wirefmt sc8 --nsamps 0 > > > > Problem: it seems to me that the system (GnuRadio/USRP) observes only 2MHz > of RF front end bandwdith. How do I know this? Ans: I compare such settings > with the following settings: > sudo ./rx_samples_to_file --args addr=192.168.10.2 master_clock_rate=50e6 > --freq=2460e6 --bw=50e6 --rate 50e6 --gain=50 --wirefmt sc8 --nsamps 0 > > The later setting seems to be actual 50 MHz of Rf front end. > > Any comments and advices on how to create aliasing using USRP are > appreciate. > > Best, > Wahhab > > > > ------------------------------ > _______________________________________________ > USRP-users mailing list > [email protected] > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > > > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > Virus-free. > www.avast.com > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > <#m_5211752623429318912_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >
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