Differences

This shows you the differences between two versions of the page.

--- sideband [2025/06/26 09:27] – pklapetek
+++ sideband [2025/06/26 09:31] (current) – pklapetek
@@ Line 5: / Line 5: @@
 To set up the hardware for FM-KPFM operation with Gwyscope, use the same settings as for [[amkpfm|AM KPFM]].
-To set up the operation, first measure the second harmonic resonance frequency using the Tapping mode
+To set up the operation, first measure the second harmonic resonance frequency using Spectral probe response dialogue. For rectangular cantilevers, the frequency should be about 6 times higher than the base one. Then go back to base frequency and set the Tapping mode operation as usual.
+Then, pick "Sideband manual" regime in the KPFM tab in the main Gwyscope window and adjust the auxiliary frequency to a difference of the first and second harmonic frequency (e.g. for 50 kHz and 300 kHz resonance frequencies, set the auxiliary frequency to 250 kHz). Make sure that the number of waves to be evaluated by lockin 2 is high enough (e.g. 128 waves).
+Then the KPFM dialogue (see [[amkpfm|AM KPFM]] description for more details) can be used to select the right signal for feedback by adjusting the phase or altering the excitation frequency.
-pick "Sideband manual" regime in the KPFM tab in the main Gwyscope window and adjust the freq Then the KPFM dialogue (see [[amkpfm|AM KPFM]] description for more details) can be used to select the right signal for feedback.