[USRP-users] The problem with setting the frequency of USRP B 210.

Ivan Zahartchuk adray0001 at gmail.com
Mon Mar 11 10:49:52 EDT 2019


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
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