[hpsdr] Mercury 2.6

[Phil Harman]

Hi Doug,

Thanks for the offer but we are close to a new version of code that 
should fix the problem.

With the Atom 330 does the USB controller share an interrupt with 
another device?

Phil....



Quoting Doug Bade <kd8b at thebades.net>:

> The Atom 330 intel mini itx boards all seem to do it....at least 
> those of us running the HPSDR this way who have compared notes find 
> this.. Even 96K at 2048 no longer works it distorts as he describes.. 
> interestingly the CPU load is only about 12-18 % even when it is 
> popping and distorting... I have had to drop to 96k 1024 to get it to 
> work 99% as it still pops once in a while.. 96k 512 is good audio but 
> cpu load starts climbing..... Not complaining but it has gotten worse 
> with later releases of code. Would it help to have one of these 
> boards shipped to one of you for tests??? they are not real 
> expensive....and small enough to ship cheap..
>
> I would volunteer mine as you have your own Mercury etc... :-) The 
> board runs on 160w ps so about anything you have laying around runs 
> it...
>
> Doug
> KD8B
>
>
> At 07:05 PM 2/16/2009, Phil Harman wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>>
>> Hi Jeff,
>>
>> Thanks for your tests.  We are working hard on tracking down the 
>> reason for the popping at 192k and 2048 buffer. Neither Bill, 
>> KD5TFD, nor I can reproduce the problem which makes fixing it a 
>> little harder.
>>
>> I've never been able to run at 192k with 256 buffers with any 
>> version of the code.
>>
>> 73's Phil...VK6APH
>>
>>
>>
>>
>> Quoting Jeff Cook <jeffrie at talktalk.net>:
>>
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>> These are my observations regarding Mercury 2.6
>>>
>>>                                              _Primary_
>>>
>>> Sample Rate             Buffer Size                    Result
>>>
>>> 192,000                         2048
>>>      Popping
>>>
>>> 192,000                         1024
>>>      Good
>>>
>>> 192,000                         512
>>>       Good
>>>
>>> 192,000                         256
>>>       Break up
>>>
>>>
>>>                                                _VAC_
>>>
>>> 192,000                         2048
>>>      Gross Distortion
>>>
>>> 192,000                         1024
>>>      Popping
>>>
>>> 192,000                         512
>>>       popping
>>>
>>> 192,000                         256
>>>       Gross Breakup
>>>
>>> 96,000                           Any
>>>       Good
>>>
>>> In my view HPSDR is the best thing to happen in ham radio for years.
>>> It, together with the software offers a degree of control that I've 
>>> never experienced in a radio before.
>>>
>>> Jeff Cook G0AFQ.
>>>
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>>
>>
>>
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>



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