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Re: [Discuss-gnuradio] GRC's graphical sinks performance issues

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] GRC's graphical sinks performance issues
Date: Thu, 02 Sep 2010 01:08:17 -0400
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20100720 Fedora/3.0.6-1.fc12 Thunderbird/3.0.6

On 09/02/2010 12:52 AM, Matt Ettus wrote:
> This is where your problem is.  If you are using decimation of 4 then
> you are sending 25 million samples per second to the display. 
> However, you are telling it that its sample rate is 1 Million.  Thus
> you are giving it 25 times as many samples per second as it expects. 
> Tell it to expect 25 MS/s and you won't have any problem.
> Matt
25Msps with a 1.6GHz CPU, with default FFT display update rate?  Aint
gonna happen, in my experience.

Smaller bandwidth, lower FFT update rate (5Hz, instead of the default
which is much higher).

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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