[time-nuts] cheap 5V OCXO in 14DIP has about 1E-9 drift per day

Brooke Clarke brooke at pacific.net
Sat Apr 9 18:56:07 UTC 2011


Hi Chuck:

I think it comes from the way schematics are labeled.
If you use 1.8 k Ohms the point may not be seen since "." is easy to miss.
But if you use 1k8 there's no question about the meaning.

Have Fun,

Brooke Clarke
http://www.PRC68.com


Chuck Harris wrote:
> Ok, I'm going nuts.  Why are you guys using such a
> perverse way of indicating frequency?
>
> I was of the understanding that SI specified you display
> 1.0MHz as 1.0MHz, or 1,0MHz.  But not 1M0 Hz.
>
> What's the story?
>
> -Chuck Harris
>
> Greg Broburg wrote:
>> In looking at the CRD idea, it is not obvious to me how either
>> of the 16M0 Hz or the 10M0 Hz signal would contain any
>> relevant energy that would give the precision necessary for
>> the desired ideal result.
>>
>> The only harmonic relationship that I can see is to square up
>> the clean analog and divide by 13 down to 2M0 Hz, thence use
>> the 5th and 8th harmonics at 10M0 and 16M0 but then why
>> use the 16M0 at all?
>>
>> I expect that I am missing something obvious here
>> a little nudge may help.
>>
>> Regards;
>>
>> Greg
>
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