Once the power of the ground station is adjusted
properly (i.e. below level of the LEILA2-jammer)
there is no need for monitoring your uplink signal constantly.
That does not work, because the transponder has AGC (at least all earlier transponders did, I presume this one will have it as well) so the downlink signal for a given uplink output level will vary depending on the other activity on the transponder.
When you have adjusted your power at a busy time, you will cause too strong downlink signal (and LEILA2 warnings) when it is quiet.