[USRP-users] B200 cannot output a sine wave

Marcus D. Leech patchvonbraun at gmail.com
Mon Jul 27 21:45:00 EDT 2020


On 07/27/2020 09:05 PM, Aaron Smith via USRP-users wrote:
> Hello all,
>
> I am trying to output a sine wave from a B200 using custom code, or 
> the UHD tx_waveform example. In either case, when I view the output on 
> an o-scope, there is not a pure sine wave. The output looks more 
> triangular wave. I have used this scope with other B200s and the same 
> code to get a pure sine. Is the radio damaged? Is there some sort of 
> calibration required? I am using UHD 3.15.0.
>
> Thanks
>
>
>
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What frequency?  What gain settings? What is your baseband bandwidth?  
Is your coax cable known to be "good" at the frequency of interest?
   What sample rate?  Is the baseband signal well within the Nyquist limits?


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