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

[Chuck Harris]

Hi Brooke,

My recollection of first seeing the 4K7 style of marking was
around about the time computers started being used for inventory
control... 1970's.  It was only the European companies that
were doing it.  It eliminated the confusion caused by the US/Eu
"." and "," decimal points.  It also is less prone to losing the
"." on a component, or PCB mask.

I acknowledge all of that.  But as far as I know, it has never
been used for time and frequency.  That is what I am concerned
about.  It seriously degrades the readability of the emails that
are formatted that way.

-Chuck Harris

Brooke Clarke wrote:
> 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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