Hi Marcus, Yes, thanks for that clarification. I'd been thinking about automatic IQ correction, which the AD9361/9364/9371 support. The file based IQ correction will only be applied if the calibration utilities have already been run on that daughterboard and system before. http://files.ettus.com/manual/page_calibration.html
Regards, Derek On Tue, May 22, 2018 at 4:44 PM, Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com> wrote: > On 05/22/2018 11:25 AM, Derek Kozel via USRP-users wrote: > > Hello Kunal, > > What daughterboard do you have? I do not believe that there is an IQ > balance function on the N210. Those functions apply to the E31x, B2xx, and > possibly N310 USRPs. There should be a DC notch filter which is selected on > and off, but I would have to check to see if that applies to the N210. > > What difference in the spectrum are you expecting? What signals are you > observing while doing these tests? > > Regards, > Derek > > The N210 does indeed have DC offset and I/Q balance correction. The I/Q > balance correction is based on a calibration file (which is what the cal_* > utilities are for). > > But the DC-offset correction is board agnostic. > > > > On Tue, May 22, 2018 at 4:06 PM, kunal sankhe via USRP-users < > usrp-users@lists.ettus.com> wrote: > >> Hi, >> >> I want to disable automatic calibration of DC offset and IQ imbalance in >> USRP Source block. >> >> I am aware that I need to pass bool value 'false' as the argument to >> *set_auto_dc_offset* and *set_auto_iq_balance*. The USRP Source block >> itself provide this facility in the tab *FE Corrections*. However, it >> does not seem to work. By providing 0 (boolean false) value in Enable DC >> Offset Correction and Enable IQ Imbalance Correction do not disable the >> automation DC offset and IQ Imbalance correction. I tested this with USRP >> N210 by simply using USRP Source block centered at frequency 915MHz >> connected with WX GUI FFT Sink. The spectrum plot does not show any changes >> in both cases. >> >> If I want to force these changes in the UHD code (usrp_source_impl.cc and >> usrp_source_impl.h), what changes do I need to make? >> >> >> Thanks, >> Kunal >> >> >> >> >> >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> >> > > > _______________________________________________ > USRP-users mailing > listUSRP-users@lists.ettus.comhttp://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >
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