HMC7044 OSCOUT quality

Hello,

We would like to use OSCOUT output as a reference for next HMC7044 OSCIN input (in cascade). The problem is that we measured phase noise of the OSCOUT output with greater jitter than we expected - compared to CLKOUT outputs.

For DCLK we measured circa 200fs and for OSCOUT output we got 260fs (integration bandwidth 10Hz - 20MHz).

We are using CVSS-945. It should have circa 100fs according to the datasheet (calculated from https://abracon.com/phaseNoiseCalculator.php).

We haven´t found any information about OSCOUT parameterers in HMC7044´s datasheet so we miss practical usage of this output.

Can you please help us?

Best regards,

Dan