Bob,

On Mon, 23 Jul 2007 13:28:55 -0700, Bob Axtell wrote:

>...   
> I have all of the written time code specs, but I am error-prone,  so I 
> like to run tests if possible....
> 
> The signal itself is carrier only, but I believe the receiver chip 
> output is open collector, so by attaching a small beeper, a decent 
> recording can be made. but...

Unfortunately the way the clocks are manufactured, it's not easy to get to the electronics while they're working.  But if I get some spare time (!) I'll 
see if I can get anything useful from them.
 
> I think what I will do instead is to develop a small clock, driven by a 
> PIC12F629, using my extraction algorithm for MSF, DC77, etc. Then I can 
> ask an assistant in each area to simply tell me if it keeps time. If it 
> works, my assistant can keep it....(will drive
> a single-line LCD display). That will cost me about 3 clocks total (I 
> won't do japan's 25khz signal).

Well I can certainly do that for you, by putting it next to one of my own MSF clocks I can tell you (within my ability to read it!) how well it stays in 
sync.

Cheers,


Howard Winter
St.Albans, England


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