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<body class='hmmessage'><div dir='ltr'>You have to use *something* that will take the precise 10MHz (or whatever it is) from the<br>GPSDO and PLL (phase-locked) convert it to 9.6MHz (square wave at 3.3V for the CPU clock).<br><br>We had to use 9.6 MHz mainly because of the DAC in the dsPIC instead of 10MHz. The options for<br>various divide/clock radios in the part are RATHER limited. As I recall, there wasn't even a way of<br>getting the necessary 16Ks/s sample rate on the ADC from 10MHZ, either.<br><br>Jim<br><br><div><hr id="stopSpelling">From: monty@ke7jvx.com<br>Date: Tue, 1 Dec 2015 21:27:18 -0700<br>Subject: Re: [App_rpt-users] Thru Hole Voter Board Firmware Update Procedure<br>To: telesistant@hotmail.com<br>CC: app_rpt-users@ohnosec.org<br><br><div dir="ltr">Jim,<div><br></div><div>I was able to load the new firmware and it does work a lot better! But you are right, we are having a intermittent heterodyne in the overlapping areas of coverage. How would someone modify the voter board and GPSDO to do so?</div><div class="ecxgmail_extra"><br clear="all"><div><div><br>Monty</div></div>
<br><div class="ecxgmail_quote">On Tue, Dec 1, 2015 at 4:39 PM, Jim Duuuude <span dir="ltr"><<a href="mailto:telesistant@hotmail.com" target="_blank">telesistant@hotmail.com</a>></span> wrote:<br><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;">
<div><div dir="ltr">Yes, I think it is MORE then safe to say that the newer firmware will work a WHOLE lot<br>better for simulcast. It would also be helpful to modify the board to provide external<br>GPSDO-synchronized CPU clocking (unless you want to play the "fun" game of "gee, where's<br>the overlap grunge zone this week?").<br><br>If your firmware is THAT old, you will probably also see serious performance enhancements<br>on properly representing the S/N ratio of weak signals.<br><br>Jim<br><br><div><hr>From: <a href="mailto:monty@ke7jvx.com" target="_blank">monty@ke7jvx.com</a><br>Date: Tue, 1 Dec 2015 14:48:30 -0700<br>To: <a href="mailto:app_rpt-users@ohnosec.org" target="_blank">app_rpt-users@ohnosec.org</a><br>CC: <a href="mailto:ke7jvx@gmail.com" target="_blank">ke7jvx@gmail.com</a><br>Subject: [App_rpt-users] Thru Hole Voter Board Firmware Update Procedure<div><div><br><br><div dir="ltr">Hello All,<div><br></div><div>I have three thru hole voter boards with firmware from 2012, l am wondering if anyone has a procedure on how to update the firmware? </div><div><br></div><div>Also, I see in the svn there is a Simulcast portion, and I do have two of them setup as a simulcast, is there something different with the firmware for simulcast operation?<br clear="all"><div><br clear="all"><div><div><br>Monty</div></div>
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