Re: [Discuss-gnuradio] QT Vector Sink Issue

[Martin Braun]

Just to make sure we're all on the same page: The vector sink is meant
to display vectors of data, one at a time. It's basically like the
frequency sink if you had to vectorize and FFT the data yourself.

So putting a time signal into the vector sink is maybe not the right
thing to do, but I'm not sure what your application is exactly. There
are some examples for the vector sink, maybe they help you understand
the issues better.

The vector sink always draws a line at 0, and another at the ref level.
I'm not sure why it draws the line at 0, tbh. Who wrote this damn... oh
it was me. Still, not sure why it's there.

Cheers,
Martin

On 02/24/2016 04:39 AM, Nigel Steed wrote:
> Hi All,
> 
>  
> 
> I am currently trying to compare any difference between the QT Time Sink
> and the QT Vector Sink code. I have a GRC Flowgraph which uses both of
> these plots. The QT Time Sink works every time, but if I connect a QT
> Vector Sink at the same point it fails to display data other than zero,
> although the axis updates as auto range is enabled.
> 
>  
> 
> The data feeding the sinks has been decimated down to a slow rate to
> provide a vector every second. The time sink works updating every
> second, but the only update on the vector sink is the axis adjusting,
> and the data remaining at zero.
> 
>  
> 
> If I simplify the flowgraph to a source, stream to vector and then
> vector sink it all works fine.
> 
>  
> 
> I am assuming the GNURadio scheduler must be coping with this setup as
> the axis on the vector plot update at the right rate, but the data line
> is fixed at zero.
> 
>  
> 
> Has anyone else seen this behavior ? I am using version V3.7.9.1.
> 
>  
> 
> Kind regards,
> 
>  
> 
> Nigel
> 
>  
> 
> 
> 
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>