[time-nuts] FA2 internal OCXO orientation sensitivity

2019-10-14 Thread Mark Sims
It's not due to thermal issues. The freq change due to tip is way too fast for that. --- > It’s also possible that the sensitivity is due to thermal issues. ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

Re: [time-nuts] FA2 internal OCXO orientation sensitivity

2019-10-14 Thread Bob kb8tq
Hi A lot depends on the source of the tip sensitivity. If it is acceleration then indeed vibration will get to you. It’s also possible that the sensitivity is due to thermal issues. In that case, vibration will not be as big an issue. Worst axis is about +/- 3 ppb so it could be from either

Re: [time-nuts] FA2 internal OCXO orientation sensitivity

2019-10-14 Thread Didier Juges
If it is sensitive to orientation, it is probably also sensitive to vibrations, so mobile applications may be out of the question, depending on your needs. Didier KO4BB On Mon, Oct 7, 2019 at 2:00 AM Mark Sims wrote: > The first time that I tried to set the FA2 internal oscillator frequency I

[time-nuts] FA2 internal OCXO orientation sensitivity

2019-10-07 Thread Mark Sims
The first time that I tried to set the FA2 internal oscillator frequency I tilted the case so that the screen was facing down and the adjustment screw was facing up. I got it on frequency, but when I placed the unit with the bottom of the case facing down the oscillator was 0.032 Hz off. So I