Re: [Discuss-gnuradio] spectrum repeats at 64MHz

[CEL]

Hello cesar,

never, ever, use a Throttle in a flow graph with a hardware source. You
run into the two-clock problem. 
In fact, GRC emits a clear warning that you should not have a throttle
there.

Best regards,
Marcus

On Fri, 2018-12-07 at 17:01 -0600, cesar wrote:
> Hello
> 
> Im new in GNUradio and I am trying to build a spectrum analyzer using a 
> USRP, to sweep the spectrum from 0 to 112 MHz. In order to scan the 
> total 112 MHz window, I see individual 8 MHz bandwidth windows at a 
> time. But I see that at 64 MHz the spectrum repeats.
> 
> My question is why the spectrum repeats at 64 MHz? and how can I solve 
> it?
> 
> Somebody can help me please?
> 
> The features of the USRP are:
> 
> ADC sample rate = 64 MS/s
> clock frequency = 64 MHz
> daughterboard = BasicRX with range 1-250 MHz
> 
> I attach the spectrum of the 0-8 MHz and 64-72 MHz windows to example 
> the case and my flowgraph in GRC.
> 
> Thanks for the help
> 
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