Vibrato waveform? LFO waveform?

the Cubase effect Vibrato is basically an LFO right? If it is, wich waveform produces?
And the Tremolo?
And by the way, what I think I really want to know is how to see an LFO’s waveform in general.
Already tried with oscilloscope, even though not so intesely… Is possible?
Other ways?

Thanks if you know.