B&K Precision 2542B-GEN - Manual - Manual (Page 189)

Quick Start Guide
189
 Press the SINGLE key to start the acquisition system
and search for the trigger condition. The SINGLE key will
be illuminated in orange.
 When trigger condition is met, the captured waveform will
be displayed, the SINGLE key will no longer be lit, and
the RUN/STOP key will illuminate in red.