When making these measurements, be very careful that whatever wire you are using to
probe the circuit does not cause shorts to adjacent pins or components, which could cause
damage.
I suggest avoiding directly probing the Si5351A chip pins, they are just too small: the risk of
shorting adjacent pins is high. You can easily probe nearby components which are
connected to the Si5351A pins, if you wish – refer to the PCB tracks diagram. Similarly, I do
not recommend directly probing the FST3253 pins. Again, it is easy to probe nearby
components which are connected to those pins, and reduces the risk of damaging
something by causing inadvertent short circuits.
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