Man key on front panel, triggered by press or release or both.
External In (External signal) triggered by rising or falling or both
edges.
Internal (Internally triggered bursts), select the triggering period.
You can select the number of cycles per burst in the range of 2 to 1,000, 000.
Trigger Out marks each cycle.
Strobe Out rises at the start of the first cycle in a burst and falls at the start
of the last cycle.