Interesting behavior: if i put a 4w short on both front and rear connectors, and allow the reading to stabilize, then i switch from front/rear, the reading reamain quite well at around 0. While, if i open the short on front (while reading the front terminals), and redo the short, it goes to 0 quite fast (as it should). Instead, if i open the rear short (while reading the rear terminals), it start from above 50mohm going slowing down, both on front and rear terminals. But to me not seem that there is a cross talk between front and rear terminals. This after around 12h of power on.
Note to add: while reading the front terminals it settle to 0 quite fast only if i leave the contacts open for small times. Maybe this behaviour is due that the front terminals read "phantom values".
Can change something switching from 10Gohm input impedance to 10Mohm?
In any case, nothing seem have sense to me on what it do 🤔