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Table 2.

Parameters used for the dithering signals.

Dithering sequence configuration
Number of modes K 3
Duration T 500 ms – 250 frames
Signal shape Aicos (2πfit)

ψi gain reduction 8.0

Modes ψi Fig. 7
Frequencies fi 20, 30 and 40 Hz
Amplitude Ai auto. S/N assessment
Min. amplitude 1.5 nm RMS per mode
Max. amplitude 25.0 nm RMS per mode
Noise meas. band Δf ±2 DFT bins i.e., ±4 Hz

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