// Set sample bias
//spm.bias.sample.value = 2; // Disabled the Dual Sample Bias
spm.bias.sample.forward = 2; 
spm.bias.sample.backward = 3;
 
// Set tip bias
spm.bias.tip = 3; // DC

// set each parameters for KPFM configuration
var d = spm.kpfm.config;
d.isServoOn = false;
spm.kpfm.config = d;
spm.sleep(50) // at least 50 ms
spm.kpfm.startTuning()
spm.sleep(50) // at least 50 ms
var params = {
"isServoOn": true,
"servoGain": 0.3,
"servoType": 1,
"workFunctionOffset": 0.0,
"useSidebandServo": false // false: AM
};
spm.kpfm.config = params;