Hi, I just tried another one (and believe it is for all of them). When rotate epsilon to zero degree, the boresight stayed on zero degrees and clutters too... This is when you locked your SNR down. From now, all elevation change is disabled, until you press the release button.
(manual page 21, button 4)
Then switch on "<5 km" mode and boresight should going 3 degrees left, but it seems that the SNR goes up, and boresight is in the clutters again. Actually when H<5 is switched, the SNR elevates 3 degree mechanically and the boresight goes electronically down 3 degree.
So at the end of the change, it is pointing to the same elevation.
BUT
You locked the system in elevation, so it cannot go up mechanically, until you press jam release.
Then push unlock button, and suddently clutters jumps up with 3 degrees.... If the zerowing of epsilon is done in "<5 km" mode already activated, everything is ok...