Herelink RC curve not smooth

[Will]

Hello~!

I’m using Cube Orange + ArduCopter V4.0.5 on my quadcopter.
I was checking Herelink if everything is okay before I go out and do flight test.

But when I lift the throttle, the rpm goes up but not smooth.
It goes up like a stairway. Please see below photo.

Also I can tell by the sound as well. It’s not smooth, rather goes up in steps.
I don’t want to risk flying like this, It’s dangerous.

I tried with my other Remote Controller(DK-32S), and the rpm was smooth and looked good.

Could anyone help me what troubleshooting i need to try on my Herelink?

[Julien (__Airbot Systems)]

Did you made the Herelink hardware calibration + pixhawk RC calibration ?

[Will]

Okay.
I’ve just done HW calibration and pixhawk RC calibration one more time.
But it’s same… Please see screenshot below.

Any way to solve this issue?

[Julien (__Airbot Systems)]

Yep, that seems to increase and decrease by steps… Or firsts signs of parkinson ?
I would suggest to reset factory Air and Ground units, then recalibrate everything.