Attached is what I'm seeing in terms of adev and mdev on my "new" FTS 4050. The performance is worse than I had expected, as compared to the datasheet. I'm not 100% confident in my test setup, but I'm not seeing any obvious outliers in the data.
Test setup is as follows: Counter: HP 53132A Timebase: external, 10MHz from Z3801A Start: 1 PPS from Z3801A, DC, 50Z, 2v5 trigger level Stop: 1 MHz from FTS 4050, AC, 50Z, auto trigger -ch
fts4050ti_vsz38081a_pps_53132_z3801a_fref.png
Description: PNG image
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