Re: [time-nuts] 53132A Polish UHS Time Base Option Interesting Ovservation

2015-05-12 Thread D W
And this is where one question leads to another. For an oscillator that is going to be used at very high velocities and accelerations, like in a missile, would it be calibrated somehow under the target G force? Or would you just compensate some other way? Or just not worry about it? Dan On

Re: [time-nuts] 53132A Polish UHS Time Base Option Interesting Ovservation

2015-05-12 Thread Attila Kinali
On Tue, 12 May 2015 15:15:51 +1000 Tim t...@skybase.net wrote: For an explanation... http://www.eevblog.com/2014/07/31/eevblog-646-gravity-detection-using-a-frequency-counter/ regards For a real explanation, see Vig's Quartz Crystal Resonator/Oscillator Tutorial, which you can find, for

Re: [time-nuts] 53132A Polish UHS Time Base Option Interesting Ovservation

2015-05-12 Thread Björn
/divdivRubrik: Re: [time-nuts] 53132A Polish UHS Time Base Option Interesting Ovservation /divdiv /div And this is where one question leads to another. For an oscillator that is going to be used at very high velocities and accelerations, like in a missile, would it be calibrated somehow

Re: [time-nuts] 53132A Polish UHS Time Base Option Interesting Ovservation

2015-05-12 Thread Bob Camp
Hi The answer to any complicated question is always going to be “that depends” … You can indeed buy acceleration compensated OCXO’s. You can get them that only compensate simple (DC) acceleration or that compensate vibration as well. It all depends on the requirements of your system. Bob On

Re: [time-nuts] 53132A Polish UHS Time Base Option Interesting Ovservation

2015-05-12 Thread Bob Camp
Hi All OCXO’s are sensitive to acceleration. Gravity is one form of acceleration. A sensitivity in the 0.5 to 2 ppb / G is not uncommon. Bob On May 11, 2015, at 9:24 PM, J. L. Trantham jlt...@att.net wrote: I recently obtained a 53132A and added the HP Opt 010 High Stability Time Base

Re: [time-nuts] 53132A Polish UHS Time Base Option Interesting Ovservation

2015-05-12 Thread Tom Holmes
. Trantham Sent: Monday, May 11, 2015 9:25 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] 53132A Polish UHS Time Base Option Interesting Ovservation I recently obtained a 53132A and added the HP Opt 010 High Stability Time Base option with a 10811 variant OCXO. I

Re: [time-nuts] 53132A Polish UHS Time Base Option Interesting Ovservation

2015-05-12 Thread Tim
On 12/05/2015 11:24 AM, J. L. Trantham wrote: [snip] It is a 'repeatable' observation. It displayed the lower frequency all day and when I 'elevated' the 53132A this evening, the frequency again went to 10.000 000 000 Mhz. Is this a 'gravity' effect? Is this an issue with the DOCXO? Is this

[time-nuts] 53132A Polish UHS Time Base Option Interesting Ovservation

2015-05-11 Thread J. L. Trantham
I recently obtained a 53132A and added the HP Opt 010 High Stability Time Base option with a 10811 variant OCXO. I left it on for over a week and it, ultimately, seemed to slow down in its drift, with the displayed frequency, as it 'read' my GPSDO, slowly decreasing, suggesting that the Time