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<div class="moz-cite-prefix">The reflock does not have it's own
oscillator, it sniffs the tcxo as an input and has a dc output to
control the comp line or such of the tcxo osc. It has an
additional input for the ref osc like 10mhz gps etc... The boards
function is to have 2 pll oscillators based on the 2 frequencies
of input and scaled, to mathematically lock to each other...and
keep it mathematically locked. In general it should at most
introduce a little jitter but should be no phase noise that I am
aware of..<br>
It does not replace your tcxo it just watches it and controls it..<br>
<br>
Doug<br>
KD8B<br>
<br>
<br>
On 1/4/2013 8:16 PM, Ken wrote:<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">One
thing you should be aware of is that replacing a crystal
with a reflock, or similar, will increase phase noise and
spurious outputs of the attached PLL. In FM this will
probably show up as reduced adjacent channel rejection. If
you are not in a dense-signal environment, this may not be
an issue. In any case, you need to adjust the level of the
replacement signal into the PLL carefully for minimum crud
generation. Watching the output of the PLL on a spectrum
analyzer would be a good idea.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">73<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Ken<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a class="moz-txt-link-abbreviated" href="mailto:app_rpt-users-bounces@ohnosec.org">app_rpt-users-bounces@ohnosec.org</a>
[<a class="moz-txt-link-freetext" href="mailto:app_rpt-users-bounces@ohnosec.org">mailto:app_rpt-users-bounces@ohnosec.org</a>] <b>On
Behalf Of </b>Randy Neals<br>
<b>Sent:</b> Friday, January 04, 2013 7:30 PM<br>
<b>To:</b> Ron Simpson<br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:app_rpt-users@ohnosec.org">app_rpt-users@ohnosec.org</a><br>
<b>Subject:</b> Re: [App_rpt-users] GPS Locked MACTRAC<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><br>
I'm also interested in locking a transmitter frequency to
stable reference.<br>
The ICOM FR-6000 repeater which I use has a TI LMX2352 PLL
which relies on a 15.3 MHz Crystal Resonator, CR-826 type.<br>
<br>
It appears that I might be able to replace the crystal
with a reflock board (Link below), with the reflock
generating the 15.3 MHz.<br>
<a moz-do-not-send="true"
href="http://www.qsl.net/ct1dmk/reflock.html">http://www.qsl.net/ct1dmk/reflock.html</a><br>
<br>
Here is an example of a ham reflock'ing a yaesu 817
all-mode radio to a 10 MHz reference input<br>
<a moz-do-not-send="true"
href="http://www.vk3hz.net/riglock/FT817_External_Reference.pdf">http://www.vk3hz.net/riglock/FT817_External_Reference.pdf</a><br>
<br>
The 10 MHz reference signal can be from a Rubidium
Oscillator or from GPS Disciplined Oscillator, both of
which are available from eBay.<br>
The Trimble Thunderbolt is a common GPSDO. Some good
general info is on John's web site: <a
moz-do-not-send="true"
href="http://www.ke5fx.com/tbolt.htm">http://www.ke5fx.com/tbolt.htm</a><o:p></o:p></p>
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<p class="MsoNormal"><br>
73,<o:p></o:p></p>
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<div>
<p class="MsoNormal">Randy - VE3RWN / W3RWN<o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Wed, Jan 2, 2013 at 12:22 PM, Ron
Simpson <<a moz-do-not-send="true"
href="mailto:n6gkj.cm98@yahoo.com" target="_blank">n6gkj.cm98@yahoo.com</a>>
wrote:<o:p></o:p></p>
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<p>Hey guys, Happy New Year!<o:p></o:p></p>
<p>Looking for ideas to cleanly phase lock a
MAXTRAC. I have the boards, I have an idea on how
I want to do it. Just would like input from those
who already have done it. I looked online for some
info but found nothing.<o:p></o:p></p>
<p>I can break the ref osc tune line and take that
signal out. I can pick off the 14.4 mhz and bring
that out, but I want to do it cleanly, not a
hatchet job.<o:p></o:p></p>
<p>Anyone have pics?<o:p></o:p></p>
<p>73,<br>
Ron, N6GKJ<o:p></o:p></p>
<p>Sent from Yahoo! Mail on Android<o:p></o:p></p>
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