[time-nuts] time-nuts, frequency counters

[Rex]

Chuck Harris wrote:
> ); SAEximRunCond expanded to false
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>
> The simple answer, is it introduces another place for drift
> to occur.  If the power supply that provides the current to
> create the C-field drifts with temperature, component aging,
> power line voltages, phases of the moon, ... your reference's
> frequency will also drift.
>
> -Chuck Harris
>   
I must be missing something. Aren't all those bad things going to happen 
whether you adjust
the C-field or leave it untouched? Isn't the C-field required for the Rb 
to work dependably
and on freq? I think the question pertains to Rb sources that already 
have a screw to make
the adjustment. Maybe you are saying the screw is there to put the 
C-field back where it belongs.
I would have no way of knowing how to tell if it was right or wrong 
other than frequency.

Rick said it is not a good way to adjust the frequency. I don't really 
understand why exactly either.
> Peter Vince wrote:
>   
>> ); SAEximRunCond expanded to false
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>> Hi Rick,
>>
>>     
>>> Newer Rb units may use adjustment of the internal synthesizer
>>> in place of modifying the C-field.  There are many disadvantages
>>> to modifying the C-field.
>>>       
>> I'm also relatively new to the area - could you please elaborate on 
>> why modifying the C-field is a bad idea?
>>
>> 	Thnaks,
>>
>> 		Peter Vince
>>
>>     
>