[450] Link back up

[Shawn Zupp]

Will test this evening from the Commons.

Sent from my iPhone

> On Nov 3, 2015, at 6:43 PM, Daniel May <woodyboy.dm at gmail.com> wrote:
> 
> NQ1X; KB1THK.
> 
> 
> 
> 
> Sent via the Samsung GALAXY S®4, an AT&T 4G LTE smartphone
> 
> 
> -------- Original message --------
> From: K1FSY <k1fsy at vhfwiki.com> 
> Date: 11/03/2015 10:17 AM (GMT-05:00) 
> To: 450 at lists.vhfwiki.com 
> Subject: Re: [450] Link back up 
> 
> cool.
> 
> Everything you need to build it from git should be on there already, but
> expect it to take a long time to compile :)
> 
> On 11/3/2015 1:21 AM, John Foege wrote:
> > The link is back up for testing.
> > 
> > RF input side audio has been *significantly* improved.
> > 
> > TX audio out from internet still sounds great playing through the
> > integrated broadcom soundcard.
> > 
> > I believe the PTT line issue is solved now. It seemed to be RF getting
> > in via the BUSY/RECEIVING data line coming out of the radio back to the
> > raspberry pi. A partial fix was to wrap this line 10-20 around a ferrite
> > core. This seemed to solved the instability issue about 80% of the time.
> > As an added measure, I placed a pull-up resistor on the PTT line on the
> > raspi side from +5V board input to the PTT line output on the ULN2003A
> > driver. This should help to force the PTT line to a determinate state
> > and should solve the intermittent PTT line issue 100%.
> > 
> > We tried moving both input and output audio streams to the attached USB
> > sound card, and this worked, however the USB sound card had noticeably
> > inferior output audio (read clock noise), and thus we switched back to
> > the raspi's integrated broadcom sound card for output audio, while
> > retaining the attached USB sound card for input audio (from the radio
> > back to the raspi).
> > 
> > Next steps will be:
> > 
> > 1) Complete backup of SDCARD image 
> > 
> > 2) Backup of svxlink conf files (git or svn repo)
> > 
> > 3) Extensive testing of link in current configuration
> > 
> > 4) Download and compile latest svxlink binaries and start w/ a simple
> > vanilla conf w/ no extraneous bullshit
> > 
> > 5) Documentation
> > 
> > 6) Stacked loop install and testing
> > 
> > Anything I miss? Any input, comments, feedback, etc?
> > 
> > What calls need to be added that are not currently in there? Or calls
> > that need to be modified?
> > 
> > I will follow w/ most current access list.
> > 
> > 
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> > 450 at lists.vhfwiki.com
> > http://lists.vhfwiki.com/cgi-bin/mailman/listinfo/450
> > 
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