PPA5xx/15xx user manual
14-3
The filter only influences the trigger detection and does not
change the data displayed.
Pretrigger may be set to:
none
25%
50%
75%
Autoranging can be used with the oscilloscope functions
but it is more customary to fix the range manually
particularly when looking for a single event in ‘single shot’
mode. Manual ranging is essential for rare events with a
low mark space ratio.