N8UR-1 vs. N8UR-2 Stability Data

This page shows the results of a 48 hour comparison between my two HP Z3801A GPS-disciplined crystal oscillators (denoted "N8UR-1" and "N8UR-2").

There are three charts shown below. The first is the raw phase comparison over the 48 hour logging period.

The second chart is a plot of the Allen Variance of N8UR-1 as compared to N8UR-2. Because of limitations in my current measurement system, please ignore the values below 100 seconds.

The third chart is a measurement of the Allen Variance at all measurement intervals. The value of this chart is that it will highlight any deterministic effect, such a temperature cycle.