[hpsdr] First Release

[Bill Tracey]

Do you see this problem only at 192khz sampling rates, or at rates below that?

I did do some profiling with AMD's CodeAnalyst on 1.6.3 and 1.9.1 
with AJO and with a Delta 44.  On 1.9.1 we're spending more time in 
the DSP code than we did on 1.6.3 -- at the higher sampling rates the 
add'l DSP cycles can be significant.    The base reason for more DSP 
code is that it is now internally running full duplex.

Another thing to try adjusting -- the process priority.  At 192khz 
you may need to run PowerSDR real time to keep it glitch free.

Regards,

Bill (kd5tfd)

At 05:33 PM 7/17/2007, Chris Gerber wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>
>Hi
>
>I observed the following. When using the first Release of the A/J/O
>software I was able to run it on all of my PC's. I have in use here.
>Starting with a 3 GHz Intel P4 down to a 1.8 GHz Intel Celeron without
>any noise clicks. I had no problem in adjusting suitable Buffersize
>to get a clear reception.
>But with the newest 1.9.1 1328 version I am only able to get a clear
>click free reception with the fastest 3 GHz P4 system, all other
>slower PC's fail, no maatter which Buffersize I choose.
>Can someone of the Software Gurus tell me the reason for that.
>
>73 Chris HB9BDM



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