Here's the manual for the probe that shipped with that model:??
On page 4 is the parts list.? You should remove parts 2 & 3, then attach part # 5 (ground spring) to the ground barrel of the probe.? Then take measurements of the IF output, placing the ground spring on the nearest ground trace on the PCB.? This will eliminate the background noise picked up by the wire ground clip.
I don't understand your comment:? "i can see each ptest the voltage jumps!"
Are you able to measure the current on the DC power cable while doing the idle current adjustment steps?? I can't provide any troubleshooting help without basic information....
Steve, W3AHL
Steve W3AHL