[Elecraft] OT: Windows 7 AGC on Input

[David Cole]

Hi,
Thank you, however I have been over that one...  I think Mike Flowers
hit the correct answer...
-- 
Thanks and 73's,
For equipment, and software setups and reviews see:
www.nk7z.net

For MixW support see;
http://groups.yahoo.com/neo/groups/mixw/info
For Dopplergram information see:
http://groups.yahoo.com/neo/groups/dopplergram/info
For MM-SSTV see:
http://groups.yahoo.com/neo/groups/MM-SSTV/info


On Sun, 2015-10-04 at 20:06 -0700, Rick Bates, WA6NHC wrote:
> From my saved email files... it may help/apply.
> 
> 
> -=-=-=-=-=-=-=--=
> 
> Found this article posted on the Yahoo Groups Ten-Tec Omni VII group
> today:  https://www.reddit.com/r/amateurradio/comments/3eytah/huge_windows_bug_ruining_your_receive_performance/
> 
>  
> 
> The article discusses a Windows Vista and later versions bug when
> interfacing with an audio device utilizing the Texas
> Instruments PCM2900 series PCM2904 and below, pre-C revisions device.
> The article also shows a permanent (software configuration change) fix
> for the bug.
> 
>  
> 
> The article states that all Signalink USB digital mode interfaces are
> affected by this bug.
> 
>  
> 
> Knowing that some of you are using the Signalink USB, I’m sending you
> this info in case you were not already aware of it.
> 
>  
> 
> Some of you may have rigs with a direct computer interface for digital
> mode operation.  Your rig may use the affected TI device.  If so, you
> are also affected.
> 
>  
> 
> In my case, I use the Signalink USB.  When I first installed it, I
> noted I had to run the Signalink’s RX gain and Codec gain controls
> very low to get good levels to the computer.  As a result, I added a
> 10:3510 or -51db (voltage) divider on the Signalink’s input (mounted
> on the rig programming socket inside the unit).  Now I know why that
> was required – the bug in Windows for the audio device being used.
> With the bug fix from the article, I have now reverted back to not
> using the voltage divider.  Hopefully, levels are now above noise
> floor values and results will be better.  I’ve also downloaded and
> installed the digital level meter applet the author mentioned.  It is
> available at http://www.darkwooddesigns.co.uk/pc2/meters.html, about
> 1/3 down in the page.
> 
>  
> 
> Hope you find this article useful.
> 
> --
> 
>  
> 
> 
> 
> 
> 
> Rick, WA6NHC
> 
> 
> iPad = small keypad = typos = sorry ;-)
> 
> On Oct 4, 2015, at 8:39 AM, David Cole <dave at nk7z.net> wrote:
> 
> 
> > Hello,
> > 
> > I am trying to solve a slight digital problem, using my K3.  I
> > suspect
> > that Windows 7 has an AGC of some type on it controlling the Line
> > Input
> > levels.
> > 
> > Can someone verify if this is true, and if so, is there a way to
> > disable
> > the AGC on input?
> > 
> > -- 
> > Thanks and 73's,
> > For equipment, and software setups and reviews see:
> > www.nk7z.net
> > 
> > For MixW support see;
> > http://groups.yahoo.com/neo/groups/mixw/info
> > For Dopplergram information see:
> > http://groups.yahoo.com/neo/groups/dopplergram/info
> > For MM-SSTV see:
> > http://groups.yahoo.com/neo/groups/MM-SSTV/info
> > 
> > 
> > 
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