[time-nuts] Dana Racal 1996 Questions

[Ulrich Bangert]

I own a 1996 since 20 years and use it on a regular base. While I do not
fully understand the measurement arrangement in the first part of your
posting I can tell you that I get wrong readings from my 1996 as well
with a low propability. It might run ok over hours and then produce a
completely wrong result for a single measurement. I am not sure whether
this is a hardware or a software bug. It may be a software bug but with
the electrolyt capacitors in it perhaps 30 yeras old I expect some of it
to have lost part of their capacity so I can well imagine that the
device might react more sensitive on anything happen on the power line
than when it was young.

Regarding part 2 of your posting: Imagine the 1996 basically as an time
interval counter ha

> -----Ursprüngliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von tom jones
> Gesendet: Samstag, 3. März 2007 02:39
> An: time-nuts at febo.com
> Betreff: [time-nuts] Dana Racal 1996 Questions
> 
> 
> Anybody using either 1996 or 1995 racal counters.
>   I use my hp5061a for external reference to both counters
>   The racals are continously in mean average mode (10000 
> seconds).with a different 
>   1pps signals to the racal counters.. 
>   Occasionaly the counters present a reading like 10.0  -3 (10ms)
>   The expected readings should be 0.001 -9   (1ps)
>    
>   Anybody else using dana racal experience this. It seems 
> like a software bug?
>    
>   Question number two;
>                 The readings from these racals seem off .
>   I get a reading like 0.001 -9  equals 1X10 -12  I belive 
> its decimal point mighy be off.
>   I'm thinking it should be  .0001 -9 equaling 1X10-13  When 
> I interpet the readings with the extra digit of accuracy the 
> readings make more sense and correlate with my austorn loran 
> frequency & timing receivers and other counters and gps 1pps signals.
>    
>   To also support my theory  the racal counters will resolve 
> 1X10 -11  using 99 (100s)  second gate time. when I activate 
> the mean average mode this extends the gate time two more 
> decimal places (10000 second gate) wouldn't you assume a 
> resultt of 2 more digits in accuracy ?  
>          
>    
>    
> 
>  
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