Atomic Force Acoustic Microscopy
12. Switch to
Scan
tab.
Now the procedure branches out to account for the recorded entity (phase, amplitude,
or frequency).
For recording the frequency change
, select the
AFAM
mode. Skip this step if the
phase change or the amplitude change are recorded.
a. Select the measurement mode in the
Mode
drop down list. The AFAM panel
appends the Control Panel to the right (Fig. 2-11). The input fields
Freq
Min
,
Max
are filled with values defined by the markers in the plot. The
Set Point
field is filled
with the phase value of 90
. The
Gain
field sets the gain coefficient to its negative
extremum.
Fig. 2-11. AFAM Control Panel
b. Select the
Freq FB Enabled
box.
For recording the phase change or the amplitude change
, the corresponding entity
should be selected as the measured signal:
a. Open
Scan Settings
dialog window (
Settings
button).
b. For signals measured on the direct scan set:
-
when recording amplitude change:
Height
and
Mag
,
-
when recording phase change:
Height
and
Phase
(Fig. 2-12).
c. Close
Scan
Settings
dialog window (
OK
button).
Fig. 2-12. Scan settings for AFAM measurement of amplitude
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