Re: CTI OSC5A2B02 OXCO module high precision frequency reference project
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On Tue, 8 Aug 2023 at 02:42, Reginald Beardsley via <pulaskite= [email protected]> wrote:
After?some?study,?I've?concluded?that?the?main?limitation?on?the?stability?of?these?is?power?supply?noise?and?temperature?stability.??I'd?like?to?get?to?0.01?ppb/yr?just?to?see?if?I?can.??The?10x?rule?of?thumb?dictates?that?I?need?noise?and?voltage?drift?in?the?single?uV?range?which?will?not?be?easy?or?quick.
Reg
0.001 ppb/year sounds unrealistic to me - by a long way. Looking at the specifications of a high-end frequency counter from Keysight, with an optional ultra high stability oven, its 50 ppb/year
Keysight specs are pretty conservative, so we might assume they actually achieve 5 ppb/year, but what you would like to get is 5 000 times better than that.
The datasheet for the Stanford Research PRS10 rubidium oscillator gives (5 x 10^-11 / year), which is 50 times worst than you would like to get.
I know you laughed at my earlier suggestion of using an LTZ1000A, but even with that, you are not going to achieve anywhere near what you want.
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