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

[W4sc]

Paul

I assume you are running Win XP...

How much memory installed in your Atom330??  I suggest upgrading to 2 
GBytes if not there.

Make sure hyper-threading and dual-core are enable in BIOS.  Board should 
have been delivered with those enabled, but always good to check. You can 
check this with perfmon, 4 cpu utilization windows (2 cores, and 2 
hyperthreads) will show up if all ok there.

Settings used are 192K OR 96K sampling, 1024 Audio Buffer, 512 DSP buffer.

W4EFZ and I had Penelope/PwrSDR and SDR-IQ/Spectraview running, and 
cruising internet, all at same time on his Atom330, no problems.  CPU 
loading was about 55% or so.

PCI USB card (must be USB 2.0 compliant)  will not help..unless OB USB is 
broken...

Check USB cable ( a long shot).  Try another.

Inspect Atlas bus VERY carefully.... Make SURE no bad solder joints,,or 
solder flash/wiskers,, clean good on pin side.

Try different slots for Qzy and Merc.just in case a slot is bad   Found 
that once things were setup correctly and Merc f/w 2.4 flashed, slot 
assignment didn't seem to matter... Merc f/w 2.4 cured a lot the "ills" we 
were having,, ie BAD distortion..

Hope this helps.

73
Ben W4SC












----- Original Message ----- 
From: "Paul Beckmann" <wa0rse at gmail.com>
To: "Philip Covington" <p.covington at gmail.com>; "Doug Bade" 
<kd8b at thebades.net>; "Bill Tracey" <bill at ewjt.com>; <hpsdr at lists.hpsdr.org>
Sent: Saturday, January 24, 2009 6:48 PM
Subject: Re: [hpsdr] Mercury v2.4 -- still distorted audio ( Atom 330 )


> ***** High Performance Software Defined Radio Discussion List *****
>
> 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
>> ---------------------------------------------------------------------------------------------------------
>> QS1R SDR Receiver Support Group: http://groups.yahoo.com/group/qs1r
>> ---------------------------------------------------------------------------------------------------------
>>
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