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DP83848 with spread spectrum generator?

Hello!

Any advice about spread spectrum generator application in DP83848 PHY ? I know that there are many other ways to remove EMC radiated noise from my device, but  could someone explain me the input clock jitter requirements ? Data sheets says 800ps for jitter - that gives much more frequency working range then other requirement (50ppm for input clock stability...) My spread spectrum chip generates  +/- 0.5% 50MHz  - the frequency deviation is within straightforward calculation for the jitter limit... Of course the ETH link does not work.

JKasperek