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Message-ID: <005b01c6676c$ed474e40$1fb06dcb@cobaltxp>
From: "Murray ZL1BPU" <zl1bpu@nzart.org.nz>
To: <rsgb_lf_group@blacksheep.org>
References: <444AF315.9020304@telus.net> <056601c66732$7dba60b0$7900a8c0@athlon1200> <444C1A56.4060202@telus.net> <057b01c66738$3e091550$7900a8c0@athlon1200>
Date: Mon, 24 Apr 2006 19:01:34 +1200
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Subject: LF: ZL2AFP Clicklock
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Status: O

Fellow LFers,

Con ZL2AFP has also written a program using Peter G3PLX's Clicklock 
technique.

Clicklock allows any stable receiver to synchronously receive LF signals, 
and integrate them over minutes, hours or even days, in order to pull them 
out of the noise. The technique is extremely sensitive and cancels 
non-coherent signals and noise. The program requires a GPS receiver with 
1PPS output and a special (but very simple) PC sound card interface. Of 
course it also only works on GPS synchronous signals, although they're not 
hard to make.

Con's program has phase and amplitude graphs in addition to the vectorscope. 
I've written a comprehensive document which gives background information, 
setup and operating instructions. Download the whole lot from:

http://homepages.ihug.co.nz/~coombedn/FILES/Clicklock2.zip

The filesize is 689k, most of it the documentation!

73,
Murray ZL1BPU