Logic vs. transistor driver

0.1ms/div
2V/div
CH1: Row 1 UDN2981A
CH2: Row 4 UDN2981A

The output of the led matrix row source driver. The signals overlap which explains the ghost images. This was measured without load btw.

I need a digital scope with deep memory to have a look at this type of signal more closely. Triggering is very hard, as there is always some jitter and the signal is not necessarily periodic.