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companies. Any rights not expressly granted herein are reserved. ATTENTION: Specifications and technical data are subject
to change without notice.
Start:
0pm
End:
maximum z scanner stroke. See data
sheet at the end of this section.
Data Points:
1000
Fwd/Bkwd:
not checked
Data Point Avg. Time:
2-10 ms
Delay Per Data Point:
0 s
Now open the ‘Details Spectroscopy’ sub menu and enter the following
parameters:
Limiter: (Stops the z spectroscopy before the a certain force onto the tip is
exceeded)
Active:
checked
Source:
ADC1
Value:
higher than the interference minimum
Sign:
Source > Value
Start the z Spectroscopy
The ‘jump-to-contact (JTC)’, will now be seen in a rather sharp ‘jump-like’
increase of the interference signal (ADC1).
Note, that it is suggestive (for the validity of the scale calibration) to keep
the feedback in the middle of the z scanner range. Move manually upwards
(or downwards) with the z positioner step by step to adjust this position.
During the contact-mode measurement, the fiber-tip distance is tried to be
kept constant. This means that the deflection of the cantilever and therefore
the force between tip and sample is kept constant by the P/I-feedback loop.
