[hpsdr] Mercury v2.4 -- still distorted audio ( Atom 330 )

[Paul Beckmann]

Hi, Phil.

Thanks for weighing in. The effect is empirical. Any suggestions come to mind?

73's
Paul, wa0rse

On 1/24/09, Philip Covington <p.covington at gmail.com> wrote:
> On Sat, Jan 24, 2009 at 2:58 PM, Doug Bade <kd8b at thebades.net> wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> In mine, nothing besides what is on the motherboard... Only 1 usb device
>> plugged in, the cable to the HPSDR...
>>
>> Doug
>> KD8B
>>
>>
>>
>> At 02:47 PM 1/24/2009, Bill Tracey wrote:
>>>
>>> Is there anything else on the USB bus on the Atom boxes?  Wondering if
>>> we're not taking a perf hit with contention for the USB bus?
>>>
>>> Regards,
>>>
>>> Bill (kd5tfd)
>>>
>>> At 01:42 PM 1/24/2009, Doug Bade wrote:
>>>>
>>>> ***** High Performance Software Defined Radio Discussion List *****
>>>>
>>>> Mine is the Atom 330 board.. lIt seems the usb subsytem is slower than
>>>> expected by the software... as an above board Pci USB card did not help
>>>> either... CPU load is very low but high processing rates seem to flood
>>>> the
>>>> data on the usb ..and introduce nasty distortion and garble.... Only
>>>> the
>>>> highest setting is broken, but some of the lower pairings introduce
>>>> clicks
>>>> and pops as well as high cpu load... Experimenting on mine I settled on
>>>> 192k
>>>> with buffers set to 1024...
>>>>
>>>> Doug
>>>> KD8B
>>>
>>
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>
> The QS1R with SDRMAXII/QS1RServer runs perfectly up to 2 MSPS (which
> is more than 10x faster than 192k) on the Atom 330 board I have.  I
> don't think your problem is with the USB ports or the Atom board.
>
> Regards,
> --
> Phil Covington
> Software Radio Laboratory LLC
> Columbus, Ohio
> http://www.srl-llc.com
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