Hi:I've been looking at the 4065B Cesium standard vs. GPS this month. After the plot showed a slope of 472E-15 the frequency offset was changed from zero to 472 on 8 May (gambling on the sign). For the next couple of days the points all were in a box 20 ns high. BUT then the slope changed. It's now got a positive slope that's very close to 472E-15 and the frequency offset is at 472 not zero. See attached plot.
What might be causing this? For example the 4065B is just sitting on a chest of drawers and might be moved or rotated a little from time to time. Is there a requirement that it be in a temperature controlled room on a concrete pillar to get into the E-14 area?
It just turns on better than 5E-13 and the attached plot seems to indicate that it and be manually adjusted to parts in E-14 but so far I've not been able to do that.
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4065BvsGPS.pdf
Description: Adobe PDF document
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