In the use of oscilloscope, there are AC, DC suppression, noise suppression, high frequency and low frequency suppression. What do these mean?

DC: Allow DC and AC components of the signal to pass;

Ac: prevent DC components from passing through;

Noise suppression: noise triggering can be avoided;

High frequency suppression: it can suppress high frequency components above 150kHz;

Low frequency suppression: It can suppress low frequency components below 8kHz.