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<body class='hmmessage'><div dir='ltr'><font style="" color="#000000" face="Tahoma,sans-serif">Mike,<br><br> Before you change any timing make sure as Jon pointed out that your COS signal is going hard high and low on signal and non-signal. You might need a pullup. The URI is kind of weak in that regard. It should be TTL levels <.5 volt low and >2.5 volt high and preferably rail to rail.<br id="FontBreak"></font><br><br><b><font style="font-size:16pt;" size="4">73 Doug</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">WA3DSP</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">http://www.crompton.com/hamradio</font></b><font style="font-size:16pt;" size="4"><br></font><br><br><div><hr id="stopSpelling">From: kf7mbk@w7ara.net<br>Date: Fri, 26 Sep 2014 09:56:21 -0700<br>Subject: Re: [App_rpt-users] Fwd: COR signal getting confused<br>To: doug@crompton.com<br>CC: app_rpt-users@ohnosec.org<br><br><div dir="ltr">Doug,<div><br></div><div>First: thanks for the excellent writeup on getting allstar running on the BBB. I used it to get up and running very quickly and is the setup I am having this issue with.</div><div><br></div><div>I am running duplex =1 as well. I have not changed any timing values, (I'm essentially running the as-installed setup from the install image on your site) but I will take a look at them and see if I can make some changes for the better.</div><div><br></div><div>Thanks!</div><div>-Mike</div><div><br></div><div><br></div><div><br></div><div><br></div></div><div class="ecxgmail_extra"><br><div class="ecxgmail_quote">On Fri, Sep 26, 2014 at 9:49 AM, Doug Crompton <span dir="ltr"><<a href="mailto:doug@crompton.com" target="_blank">doug@crompton.com</a>></span> wrote:<br><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;">
<div><div dir="ltr"><hr>From: <a href="mailto:doug@crompton.com" target="_blank">doug@crompton.com</a><br>To: <a href="mailto:kf7mbk@w7ara.net" target="_blank">kf7mbk@w7ara.net</a><br>Subject: RE: [App_rpt-users] Fwd: COR signal getting confused<br>Date: Fri, 26 Sep 2014 12:46:14 -0400<br><br>
<div dir="ltr"><font color="#000000" face="Tahoma,sans-serif">That is very strange. Have you changed any of the default timing values? Are you using simplex/duplex? Courtesy tone? Timing values could effect that. <br><br>I use simplex with courtesy tone (duplex=1 in rpt.conf) on several nodes and I have never seen that problem. I have one user who has a signal like you describe. He walks in a park with a handheld and he is often in and out.<br><br>Also I assume you are not using any rxdelay?<br></font><br><b><font style="font-size:16pt;" size="4">73 Doug</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">WA3DSP</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4"><a href="http://www.crompton.com/hamradio" target="_blank">http://www.crompton.com/hamradio</a></font></b><font style="font-size:16pt;" size="4"><br></font><br><br><div><hr>From: <a href="mailto:kf7mbk@w7ara.net" target="_blank">kf7mbk@w7ara.net</a><br>Date: Fri, 26 Sep 2014 08:50:51 -0700<br>To: <a href="mailto:app_rpt-users@ohnosec.org" target="_blank">app_rpt-users@ohnosec.org</a><br>Subject: [App_rpt-users] Fwd: COR signal getting confused<div><div class="h5"><br><br><div dir="ltr"><div>Resending since my initial post has been pending moderation for 2 days now and got no reply from the list owner email.<br><br>I have modified an HT to bring out the receive LED signal and use it<br>
as the COR input to a DMK URI. It is a digital signal as viewed on a<br>
scope (i.e. very short slope in the transitions) This seems like it<br>
would work well and it does on strong signals. But on marginal signals<br>
where the LED may blink on and off quickly (like during picket<br>
fencing), it seems to confuse the URI (or the software) were it will<br>
start off good, but then a quick dropout of the COR signal will cause<br>
the software to no longer detect carrier, even though the signal on<br>
the COR input has been restored. Even if the input is solid high (or<br>
low in my case, I'm using usbinvert) it will not detect a carrier<br>
until there is another dropout of adequate time to "reset" it.<br>
<br>
I've tried putting a simple RC on the input but it didn't really help<br>
much. Seems the URI (or software) needs a significant minimum time<br>
between transitions to properly detect them, long enough that it would<br>
delay the carrier detection too much without a circuit more complex<br>
than an RC (i.e. something that would allow instant keyup, but delay<br>
the key down.)<br>
<br>
Linked is a scope image. </div><div><br></div><div><a href="https://lh5.googleusercontent.com/-CsJ9autUTAE/VCWK-uNJJpI/AAAAAAAAPSM/VsVvbPVvuEA/s800/20140923_184107.jpg" target="_blank">https://lh5.googleusercontent.com/-CsJ9autUTAE/VCWK-uNJJpI/AAAAAAAAPSM/VsVvbPVvuEA/s800/20140923_184107.jpg</a></div><div><br></div><div>Carrier was detected until this signal<br>
dropout event. Ch A is my RC filtered signal sent to the URI, Ch B is<br>
the signal out of the radio. Carrier was not detected after the 5th<br>
dropout even though the signal remained low.<br>
<br>
Anyone ever experience this and/or have ideas on how to fix it?<br>
<br>
Thanks.<br>
<br>
Mike<br>
KF7MBK<br>
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