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<html><head><meta content="text/html; charset=utf-8" http-equiv="Content-Type"></head>Interesting! Thanks for that reply, nice to have my theory confirmed. I thought I was right, but the Northland channel is the only channel I've heard it on. It's a good idea to have though, a customer of ours has something similar set up on a site South of us, although they do have mains, the hill is helicopter access only and basically only in summer. It has a massive battery bank as the hill can stay in cloud for a solid week I'm told. <br>
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Cheers! <br>
<br>
Richard / Z-master <br>
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<br><br><div class="gmail_quote">On 31 July 2016 10:10:15 PM NZST, Ian Stewart <nzlegs@gmail.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<p dir="ltr">I have to admit, it was me that installed that system. About 10 years before I retired 15 or so years ago. The telemetry transmitters are at each repeater site, a number of them. They come in 2 Flavours, analog and completely digital. Analog ones also support the digital 'channels' that the digital transmitters send, ie 'ÒN' and 'OFF' . Analog ones also send battery voltage via a analog to digital converter. It is a really simple system, 300 baud from memory, based on AX25 protocols. All TTL so fairly old now. Ďecoding would be worthless - you would have to know what each channel means. I have forgotten. </p>
<p dir="ltr">Ian</p>
<div class="gmail_extra"><br><div class="gmail_quote">On 31/07/2016 9:27 PM, "Chris Hoffmann" <<a href="mailto:chris021@gmail.com">chris021@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">I have always thought it was battery levels from solar repeaters, but have never tried to decode it. </p>
<div class="gmail_extra"><br><div class="gmail_quote">On 31/07/2016 8:40 PM, "DogSecurity - Richard" <<a href="mailto:richard@dogsecurity.co.nz" target="_blank">richard@dogsecurity.co.nz</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hey guys,<br>
<br>
I was up in Whangarei last night doing some geocaching (could have picked a better weekend....) anyway each time I've gone up, when I've been listening to the police channels, I sometimes hear some type of data tone. It's obviously some type of SCADA/data transmission although I can't pick what it is just by listening. What I'm curious about is... what is it for? are they monitoring a remote solar site for battery stats?<br>
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Cheers,<br>
<br>
Richard / Z-master<br>
<br>
<br>
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