Teledyne LeCroy LabMaster 9Zi-A - Manual (Page 147)

Getting Started Manual
922157-00 Rev A 139
Use holdoff to obtain a stable trigger for repetitive, composite waveforms.
For example, if the number or duration of sub-signals is known you can
disable them by choosing an appropriate holdoff value. Qualified triggers
operate using conditions similar to holdoff.
H
OLD
O
FF BY
T
IME
Sometimes you can achieve a stable display of complex, repetitive
waveforms by placing a condition on the time between each successive
trigger event. This time would otherwise be limited only by the input signal,
the coupling, and the instrument's bandwidth. Select a positive or negative
slope, and a minimum time between triggers. The trigger is generated
when the condition is met after the selected holdoff time, counted from
the last trigger. The delay is initialized and started on each trigger.
Edge Trigger with Holdoff by Time. The bold edges on the trigger source indicate
that a positive slope has been selected. The dashed, upward-pointing arrows
indicate potential triggers that would occur if other conditions are met. The bold
arrows indicate where the triggers actually occur when the holdoff time is met.
H
OLD
O
FF BY
E
VENTS
Select a positive or negative slope and a number of events. An event is the
number of times the trigger condition is met after the last trigger. A trigger
is generated when the condition is met after this number, counted from
the last trigger. The count is restarted on each trigger. For example, if the
event number is two, the trigger occurs on the third event.