I've been having a problem for a while now with my rigol DS1102E (was DS1052E), the horizontal scale knob is rather erratic, often one "click" jumps the scale by two scales or even it goes the wrong way, ie i want to increase the s/div but it reduces or vice versa.
Now as far as i know the know is physically ok, the roughest the unit has had is carrying it in a rucksack but really that should not case a problem to 1 knob that is less delicate surely than the thinner and taller ones.
has anyone else had this ?
is the firmware upgrade worth it ? maybe corrects this ? but the scope did not do it in the beginning and I think it's getting worse