JEOL JSPM-5200 Instructions Manual page 208

6.
Click on t
from the pull-down menu.
Fback Filter/Hz is the parameter that determines the response speed of the feedback
circuit. The larger the specified value is, the faster the response speed becomes, thus
producing a sharp image, but the feedback circuit easily oscillates. Usually, select
the highest speed at whi
image during scanning.
7.
Double-click on the Current/nA input box; then, when the numerical value is
highlighted, enter 1 using the keyboard and finalize the 1 by pressing the Tab
key.
Current/nA specifies the tunneling current flowing between the specimen surface
and the cantilever tip. You have to change the Current/nA value while watching an
image during scanning. Here, enter 1.000 provisionally.
8.
Click on the
pull-down menu.
Loop Gain is the parameter that determines the gain of the feedback circuit. The
larger the specified value is, the higher the gain becomes, thus producing a good
image of a topographic specimen, but the feed
9.
Click on the
Topography from the pull-down menu.
10.
Click on the Advanced button on the Advanced tab window.
The Advanced Control window is displayed.
TMPM5200-2
he button in the Fback Filter/Hz selection box and select 0.5
ch the feedback circuit does not oscillate while watching an
button in the Loop Gain selection box and select 8 from the
button in the Display Source 1 selection box and select
５ MEASUREMENT OPERATION
back circuit easily oscillates.
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