Modes; Laser Align; Tune Frequency - AFM Workshop TT-AFM User Manual

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Page 9
3.2.1.2.
Modes
There are two TT-AFM modes: "Contact" and "Vibrating."
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The modes are selected by the "Scan Mode" button .
When "Vibrating" mode is selected, the frequency sweep
window is activated.
3.2.1.3.
Laser Align
The position of the laser on the four-quadrant
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photodetector is presented numerically and visually with
the "Laser Align" window. These two indicators are both
updated in real time and are used for aligning the light
lever in the force sensor. There is a switch for turning the
laser "On" and "Off."
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Note: After the TT-AFM light lever is set up
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for the first time, the thumb screws used for
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laser alignment do not need to be turned
more than a few turns.
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3.2.1.4. Tune Frequency
The "Tune Frequency" window is used for selecting the
optimal conditions for making "Vibrating" mode images.
There are several controls in the window. They are:
"Amplitude"
"Phase"
"Lower" frequency
"Selected" frequency
"Upper" frequency
There are two oscilloscope windows in the "Tune
Frequency" window. One shows the amplitude of the
probe's vibration and the other shows the phase
between the drive frequency and the measured
frequency.
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