  Recently the readout of the MAGIC telescopes has been upgraded to a new
system based on the Domino Ring Sampler version 4 chip. We present the analysis
techniques and the signal extraction performance studies of this system. We
study the behaviour of the baseline, the noise, the cross-talk, the linearity
and the time resolution. We investigate also the optimal signal extraction. In
addition we show some of the analysis techniques specific to the readout based
on the Domino Ring Sampler version 2 chip, previously used in the MAGIC II
telescope.
