What is the phase noise spec for Wenzel 100MHz source?
Can you share the part number?
Possible to reproduce in simulation (SimPLL) if the REF is making a difference in phase noise?
Attached is a file containing information on the Wenzel reference oscillator.
Part number: 501-19250
You can model this in SimPLL by using the reference library editor.
When the reference library editor window opens, select : New
Then select Table for Phase Noise as below.
From there you can enter the values for phase noise at different frequency offsets as in the datasheet.