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DAC:
Z
monitored signal: AFM Aosc
Start:
0pm
End:
maximum z piezo stroke. See data sheet at
the end of this manual
Data Points:
1000
Fwd/Bkwd:
not checked
Data Point Avg. Time: 2-5ms
Delay Per Data Point: 0ms
Now open the 'Details Spectroscopy' sub menu and enter the following
parameters:
Limiter: (Stops the z spectroscopy before the tip crashes into the sample)
Active:
checked
Source:
AFM A
osc
Value:
0.5 * A
Limit:
Source<Value
The contact point where the signal is dropping sharply should be in the
middle of the z scanner range. Move manually upwards with the z positioner
in a step by step fashion to adjust this position.
The set point for the AFM Aosc signal should be chosen in such a way as
shown in the picture (typically, the set point value corresponds to 75% -
95% of the free oscillation amplitude).
