Mark,

I am not talking about the 10x/1x sensitivity scaling of your frequency counter itself. I am referring to the capacitance of the probe itself.  You should be using a 10x 'scope probe which has a low capacity and will not load the PLL Reference circuit.

73,
Don W3FPR

On 4/21/2019 1:07 PM, Mark Yergin wrote:
BNC with mini test clips.  I can switch in 10x (or 1x) on the FC but that doesn't make any difference.

FC is a BK Precision 1823A.



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