I had shown some previous data on 74HC390 dividers (10 Mhz input and
using them to generate 5 Mhz, 1 Mhz, and 1 PPS) and John had asked about
some longer term data.
So here it is, 100K ADEV with the 5370B on internal clock
Mean nS, Min nS, Max nS, STD pS
77.3434 76.82 77.83 213
76.9330 75.53 78.75 1000 (temp dropped from 72 to 50 degrees F)
76.4866 74.57 77.42 614 (brought temp back up to 72 degrees F)
76.8918 76.50 77.36 136
76.6724 76.33 77.09 149
75.9256 75.45 76.39 187 (restart - power failure)
75.8951 75.41 76.29 146
75.9744 75.64 76.31 98.1
75.8360 75.37 76.66 215
75.8356 75.33 76.25 168
75.9557 75.59 76.45 152
76.0029 75.45 76.41 159
75.7823 75.18 76.46 274
75.3876 74.55 76.60 455 (temp change, ran off UPS for 6 hours
during power failure)
75.1206 74.55 75.80 237
74.9616 74.45 75.51 204
74.8877 74.37 75.43 200
74.8367 74.39 75.47 186
74.8324 74.36 75.39 183
75.0442 74.41 76.17 378 (temp to 45F at night, to 80F in day,
inside A/C turned off)
74.8725 74.39 75.62 219
74.5939 73.85 75.61 333
74.3250 74.00 74.82 144
74.3062 73.89 74.79 132
74.1885 73.75 74.65 167
74.0325 73.14 74.63 369 (no A/C again)
74.2630 73.48 74.65 195
74.2611 73.34 74.79 246
and I quit recording - I am going on vacation...
When I get back, I will start another identical test on another
identical divider.
Brian KD4FM
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