Normalizers allow adjusting separate inputs to the *same* capacitance but not
necessarily to a specific absolute capacitance. This allows compensated probes
to be moved between channels without readjusting probe compensation.

A x10 probe may be used as a normalizer which is just a 1 megohm resistor in
parallel with an adjustable capacitance placed in series with the input. A
normalizer operates like a x2 probe.