esc_calib tool for Pixhawk in Mission planner


I have built a quadcopter with the Pixhawk and have installed the APM firmware through Mission planner.

I tried calibrating the ESCs using the “esc_calib” tool with custom upper and lower limits but is not succcesdul (i.e) it doesn’t recognize the channel or the PWM value set but instead chooses the default PWM values

Should I choose the board option as “APM” or “PX4/PIXHAWK” ?

Pls find the image attached