[time-nuts] CW12-TIM vs M12M and the world

[Ulrich Bangert]

Thomas,

> The sawtooth error on the Motorola M12+ is about +/- 25ns, while the 
> CW12-TIM has a sawtooth error of +/- 2 ns, so correcting for the 
> sawtooth error is not as critical with the CW12-TIM. 

The first claim

> The sawtooth error on the Motorola M12+ is about +/- 25ns

is correct but are you absolutely sure that the second claim is correct
too?????

It would mean a factor >10 improvement of the CW12-TIM against the M12 which
is hardly believeable. 

Best regards
Ulrich Bangert 

> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Tom Knox
> Gesendet: Mittwoch, 28. Marz 2012 20:42
> An: Time-Nuts
> Betreff: [time-nuts] CW12-TIM vs M12M and the world
> 
> 
> 
> I spoke with Navsync about some of the issues we are 
> discussing and this was their response. I just received mine 
> and will try to test it over the weekend. 1. Is CW12-TIM 
> compatible with Motorola M12 ?>>  The CW12 is designed to be 
> compatible with the M12 although there are 
> some differences.  The main hardware differences are listed 
> on page 7 of  the CW12 User Manual 
> (http://www.navsync.com/docs/cw12-tim_um.pdf).  2.  According 
> to the customer, M12 has a Sawtooth Correction Error & 
> Hanging Bridge Error? Does CW12 have a solution for these type of 
> errors? How these errors are taken care of in CW12?>>
>  The Hanging Bridge Error is a pattern seen in the sawtooth 
> error that 
> occurs as the local clock frequency changes.  The standard Motorola 
> Binary software for the CW12-TIM does not have the sawtooth 
> correction 
> field in the @@Hn command implemented, but NavSync is currently 
> developing this and it will be available in future standard releases. 
>  The sawtooth error on the Motorola M12+ is about +/- 25ns, while the 
> CW12-TIM has a sawtooth error of +/- 2 ns, so correcting for the 
> sawtooth error is not as critical with the CW12-TIM. 
> 
> Thomas Knox
> 
> 
>  		 	   		  
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