Hi,
yes, it is my fault - my set up (connections) for TI mode was not correct.
According your advices I went back to the frequency mode and set gate / sample
time to 1 second for CNT-91 and TimeLab.
Then I switched on "Smart Frequency" and "Interpolator Calibration" option on
CNT-91
1. Setting -> Misc -> Smart Meas -> Smart Frequency -> ON
Smart Frequency (valid only if the selected measurement function is
Frequency or Period Average).
By means of continuous timestamping and regression analysis, the
resolution is increased for measuring times between 0.2 s and 100 s.
2. Setting -> Misc -> Smart Meas -> Interp Calib ON
Interpolatator Calibration - By switching off the interpolator
calibration, you can increase the measurement speed at the expense of accuracy.
Please see the result with and without these CNT-91's options (Smart Frequency
and Interpolator Calibration)
https://dl.dropboxusercontent.com/u/21338179/hamradio/OCXO_Adev/morion%20ocxo%20adev%20freq%20mode%20smartfreq%20sample_1s%20interpcalib_on.jpg
.
This result is for the internal CNT-91 reference source. I will check with
external reference second Morion OCXO shortly.
Thanks,
Karen
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