[hpsdr] New Code and Distortion -tnx

[Phil Harman]

Ben,

Good to hear the latest code has fixed your issues.
I can see the distortion on a 'scope connected to the audio output of 
Mercury.

We are working on the fix.

73's Phil...VK6APH


----- Original Message ----- 
From: "W4sc" <w4sc at windstream.net>
To: <hpsdr at lists.openhpsdr.org>
Sent: Friday, June 12, 2009 8:28 PM
Subject: Re: [hpsdr] New Code and Distortion -tnx


> ***** High Performance Software Defined Radio Discussion List *****
>
> I too can confirm improvement form totaly unusable to very good.
> Previously had severe audio distortion, and what sounded like "FM-ing" on
> rx signals, decreasing with "wamup". All boards (Ozy, Penelope, and Merc.)
> have C8N grade asic mounted in 3 slot Atlas.  Still, I also notice
> occasional audio HF distortion on some signals.  Only additional filtering
> in front is high pass to keep local AM stations out. Still a big "door".
>
> Good work and thanks to all involved in resolution of the problem.
>
> 73 de Ben W4SC
>
> <snip>
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> I can confirm that the new FPGA code works from a cold start. Woot!  I
>> can
>> also confirm that there is a new "high frequency" audio distortion on
>> some
>> received signals. It seems to be relative to signal strength (e.g. the
>> higher the signal strength level the more likely there is distortion.  It
>> appears to be an issue with Rx ALC.
>>
>> Best 73's,
>> Dan (N7HQ)
>>
>
> <snip>
>
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