Hi Simona - Can you please educate us as to a few items? * your setup: you have an N200 + some daughterboard (which one) + some spectrum analyzer (which one), connected ?somehow? -> are you doing actual wireless Tx -> Rx, or do you have a cable hooked up between the N200 & spectrum analyzer?
* what waveform you're trying to generate, and what is the actual flowgraph you're using for GNU Radio? how are you generating the waveform in MATLAB? * which version of GNU Radio and UHD are you trying to use? * which version of MATLAB and it's UHD are you trying to use? The above might help someone to diagnose your issue ... without it, we can make some guesses but not much in the way of specifics. Please remember to "reply all", so that others can see your response and be able to chime in to provide help. - MLD On Tue, Jun 18, 2019, at 8:42 AM, Simona Sibio via USRP-users wrote: > Dear Sir/Madam, > > I am Simona Sibio, a student in Heriot Watt University. > I am working with USRPs both on Matlab and on Gnuradio, and with both > softwares I have the same problem: the shape (generated by N200+daughterboard > 10 MHz to 6 GHz) is not accurate, in attacched some photos. > At 1 GHz, the shape is worst than when the carrier frequency is 3GHz. > It is not possible to measure the amplitude and frequency because, also at 3 > GHz, it is not stable. > Could you help me? > > Thank you in advance. > > Best Regards, > > Simona
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