Agilent Technologies E5500 Series Guía de usuario Pagina 178

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MAC III Mode 11
Agilent 5500 SPM User’s Guide 178
Choose Mode > EFM to open the EFM Controls window:
Figure 120 EFM Controls window
The Main tab includes settings for Lock-in 1 and Q-Control:
Amplitude Displays the amplitude, in volts, of cantilever
oscillation amplitude.
Drive (%) The amplitude of the Lock-in 1 drive signal, stated
as a percentage (0-100 %) of the maximum
available 10 V.
Frequency (kHz) Displays the frequency of the Lock-in 1 signal.
From the AC Mode Tune window you can sweep
the frequency of Lock-in 1, to determine the
frequency at which the tip oscillation is maximized
(i.e., the resonant frequency).
Gain Multiplies the output of the lock-in by the selected
factor. Use a larger multiplier to improve the
signal-to-noise ratio for a small signal. Ensure that
the gain will not result in an amplitude exceeding
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