Setting up a step response with mesa gear

First off , Im no genuis with a real scope and worse with halscope.....So with that being said, Ive been tuning my servos by feel on my last two machines, it is time consuming and while I gotten them live-able, I always thought they could be tighter. My present project is a very large mill with old Ge Hi-ak amps. These were never easy to tune.They use caps and resistors to adjust lag and gain, there is a point where I may have to change them, but I really wont know untill I get close with the postion loop in EMC.

Anyway it seems like being able to visual tune them would be helpful, how do I set up halscope for a step response on;

5i23 with 7i49?
5i20 with 7i33?
5i25 with 7i77?

Ive seen examples on the forum, but like Ive kinda said, Im not a scope genius(or even any good at all!!!). Any help would be appreciated.Thanks.

JR