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 did some more testing with the case in various orientations. It looks like the frequency is fairly insensitive to orientation except for tilt in the front-back axis where it is around +/-1 milliHertz per 3 degrees of tilt (which seems rather high to me). If you are using the FA2 in a mobile application pay close attention to the front/back tilt of the case.
F:0010000000.001619430 bottom down F:0010000000.001687723 F:0010000000.001946380 F:0010000000.001902348 F:0010000000.001692710 F:0010000000.001663366 F:0010000000.001712156 F:0010000000.001760899 F:0010000000.001590295 F:0010000000.001648737 F:0010000000.001922004 bottum up F:0010000000.002214679 F:0010000000.002209653 F:0010000000.002063463 F:0010000000.001912133 F:0010000000.002556087 F:0010000000.002775519 F:0010000000.002053697 F:0010000000.002014587 F:0010000000.001570725 F:0010000000.033927950 screen down F:0010000000.033435257 F:0010000000.032562128 F:0010000000.032625399 F:0010000000.032098574 F:0010000000.032225335 F:0010000000.032391257 F:0010000000.032571790 F:0010000000.032922928 F:0009999999.971298357 screen up F:0009999999.967820455 F:0009999999.967859533 F:0009999999.967986393 F:0009999999.967800925 F:0009999999.967947314 F:0009999999.968327835 F:0009999999.968252960 F:0009999999.968030373 F:0009999999.998658455 left edge down F:0009999999.998985308 F:0010000000.000419484 F:0010000000.002063510 F:0010000000.003292634 F:0010000000.003956045 F:0010000000.002448722 left edge up F:0010000000.002029197 F:0010000000.001917045 F:0010000000.001985357 F:0010000000.002012571 F:0010000000.001980588 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
