[time-nuts] Question about SoundCard stability?
magnus at rubidium.dyndns.org
Wed Oct 13 01:09:42 UTC 2010
Hi Bob and Dave,
On 10/13/2010 02:57 AM, Bob Camp wrote:
> Yes it is a reasonable expectation as long as you don't have a lot of drafts. A good TCXO can get down to sub 0.1 ppb over that period.
This is why I like ADEV plots in datasheets. I rarely get to see them.
TDEV plots is a nice complement naturally.
> On Oct 12, 2010, at 8:21 PM, David McClain wrote:
>> Okay, perhaps I should rephrase the question... Is is reasonable to expect a TCXO to perform at 4e-9 over the FFT window period of about 87 sec? I can only imagine that the enormous (87 s) averaging period is making my measurements look so good.
>> Dr. David McClain
>> Chief Technical Officer
>> Refined Audiometrics Laboratory
>> 4391 N. Camino Ferreo
>> Tucson, AZ 85750
>> email: dbm at refined-audiometrics.com
>> phone: 1.520.390.3995
>> web: http://refined-audiometrics.com
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