LeapSecond.com :: Museum of Time & Frequency 

mc859x4034w 

Here are the performance results of this nice compact OCXO.
The stability peaks at a low of just under 5e12 at 1 second. The stability stays under 1e11 all the way out to 1000 seconds. At this point drift takes over.
TSC 5110A plots  Allan Deviation out to 10k seconds 
The phase plot below is fairly meaningless since the oscillator has drifted sufficiently from the reference to make the phase difference plot a straight line with +1 slope. The frequency plot is nicer; showing visually the frequency stability from time frames of 1 second (one pixel) to 10 minutes (full scale). Peaktopeak frequency excursions over 10 minutes are less than 8 divisions at 8e12 per division for a total range of about 6e11.
TSC 5110A plots  after 12 hours, a 10 minute sample of Phase and Frequency 
The following are essentially the same plots but scaled to 1e11 and 1e10 per division.
TSC 5110A plots  10 minute samples of Frequency  different scales 
A trick to get shortterm stability measurements for an oscillator that is still drifting is to reduce the Allan Deviation sample count so that the effect of frequency drift does not take over the calculations and pull all the numbers up. The following is a run lasting only about 8 minutes.
In this case the stability gets down to 3.6e12 at 1 second, staying under 6e12 from 0.4 to 20 seconds. The total phase difference is less than 4 ns and the frequency range is mostly within a 2 to 4e11 band.
TSC 5110A plots  Stability, shortterm, reduced sample count. 