what is PPM?
the same as the step level output (S), but the last time G1 and G2 were high, respectively. The S output gives you the step output continuously. G1 and G2 are gate outputs.
you don’t set L1 and L2, you can only set S, G1 and G2.
please read the software update documentation / notes covering the step sequencer, starting with the most recent one -