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HP5335A is measuring time from 'every other 1PPS' clock debug signal to XLI 1PPS out.
The unwrapped TIC data is really just a simple remapping of [0,1] to [-0.5, 0.5].
Most recent plot file update : Sun Jun 14 21:10:08 2020
Most recent measurement timestamp: Sun Jun 14 02:00:19 2020