Thanks for the information. But do not tell me why then in N 210 with sbx there is no such problem? Just in the N 210 I am not satisfied with the large central frequency. As I understand this is a surge in direct current. But I can't get rid of him. And sometimes there are problems with the mirror channel. If you have any advice on this, I will be extremely grateful.
пн, 11 мар. 2019 г. в 17:17, Ian Buckley <i...@ionconcepts.com>: > Ivan, > When the AD9361 is retuned, recalibration of various RF circuits may (need > to) reoccur. The device driver looks how far you have retuned from a > previous frequency, and if it exceeds a certain distance rerun’s this > calibration, which takes time. > Since Analog devices envisaged that this chip might need to be used in > applications where fast hopping is required, it does have the ability to > store multiple calibration settings locally in the radio and switch between > them quickly, but this is not functionality that is used in basic operation > under UHD. We may well have put API hook’s in there so you can manually > call this functionality under UHD, but I can’t recall. Take a look at ADI’s > documentation for more info. > > -Ian > > > On Mar 11, 2019, at 7:49 AM, Ivan Zahartchuk via USRP-users < > usrp-users@lists.ettus.com> wrote: > > > > Hello. I have a problem with the usrp b200 board. I need a fast > frequency tuning for spectrum analysis. But when I increase the band over > 200 MHz, that is, more than 8 frequency adjustments, I have problems with > time. It increases dramatically. > > Here is the code section where I measure the execution time of the > frequency setting function: > > for i, freqq in enumerate (freq): > > > > recv_samps = 0 > > self.usrp.set_rx_rate (bandwich [i]) > > start = time.time () > > self.usrp.set_rx_freq (lib.types.tune_request (freqq)) > > > > print (time.time () - start) > > And I get the following results: > > 0.154153108597 > > 0.00300002098083 > > 0.0029628276825 > > 0.00299215316772 > > 0.00298380851746 > > 0.153974056244 > > 0.153841018677 > > 0.00304222106934 > > 0.00305104255676 > > 0.0030951499939 > > 0.0030038356781 > > 0.153944015503 > > 0.153861045837 > > 0.00292587280273 > > 0.00306510925293 > > 0.00301003456116 > > 0.0029399394989 > > With USRP N 210 there is no such problem. Tell me why this problem > occurs and how can it be solved? > > Thanks in advance. Ivan > > _______________________________________________ > > USRP-users mailing list > > USRP-users@lists.ettus.com > > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >
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