Re: [Discuss-gnuradio] Display Problem with QT GUI Vector Sink

[Martin Braun]

The vector sink has an averaging option, is that on?

M
On 03.09.2015 02:25, address@hidden wrote:
> Dear all,
> 
> I built an angle-of-arrival system using four Ettus USRP2. I'm facing a
> problem when trying to display a vector containing the calculated
> MUSIC-Spectrum using a “QT GUI Vector Sink”. The vector sink won't
> display any data for the first two minutes, and then it is starting to
> show very old values. When I use the block “Vector to Stream” and a
> simple “QT GUI Time Sink” instead, the values are displayed immediately
> without delay.
> 
> The block “music_cf” feeding the vector sink is a sync_decimator,
> generating one vector of 181 elements for every 1000 input samples. I've
> provided a shortened version of my c++ code in the attachment, without
> the actual mathematics.
> 
> What could be the reason for this huge delay when using the “QT GUI
> Vector Sink”? Is it a buffering problem?
> 
> Best regards,
> Simon
> 
> Block Diagram:
> http://fs1.directupload.net/images/150903/7cnqbzup.png
> 
> 
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