Si5351A CLK0 Output Buffer #synth


I'm using ProgRock for the RX module LO.  CLK0 drives the RX.  I added an SMA to the CLK0 pads on the 5351 module for use as an LO monitor port. It drives an SMA on the back panel of my enclosure. Is there any need to isolate the 5351 CLK0 output?  The load on CLK0 is the input to an HP freq counter.  High impedance. 
I did not detect any freq shift on the RX when I i connected the freq counter.


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