If you've been paying attention, I've been struggling to get a DOC020V to achieve better stability.

But here's the thing... As I keep testing, what I get are Allan deviations of just under 1E-9 at tau 10^0.

Which is exactly what the datasheet says it should be.

But here's the thing... The DOT050Vs that I've been testing have been giving Allan deviations at tau 10^0 of closer to 1-2E-10.

Could it be possible that a TCXO that's $20 cheaper routinely outperforms an OCXO by nearly an order of magnitude at low tau?

I mean, I guess the selling point of an OCXO is the stability at higher tau over wider temperature ranges - which is irrelevant for a GPSDO since GPS (ostensibly) corrects for all that.

I've ordered a board designed for the OH300 OCXO. That one has an ADEV spec at tau 10^0 of 1E-11. The downside is that it's triple the cost of the TCXO. The TCXO variant (board only) can still be priced as it is now, but the OH300 one would be more like $300.

I wondered before if the value proposition was reasonable... now it's an even tougher sell.