Teledyne LeCroy LabMaster 9Zi-A - Manual (Page 145)

Getting Started Manual
922157-00 Rev A 137
Note that the trigger level is specified in volts and normally remains
unchanged when the vertical gain or offset is modified.
The Amplitude and Range of the trigger level have limits detailed in
the specifications regularly maintained at teledynelecroy.com.
Touch inside the Level data entry control and provide a value using
your preferred input control method. Additional information on
using the touch screen controls can be found in the Dialog Area (on
page 87).
Provide a voltage level (in millivolts).
PLEASE NOTE THE FOLLOWING:

Once specified, Trigger Level and Coupling are the only parameters
remaining unchanged as you switch from trigger mode to trigger mode for
each trigger source.

Some additional controls and dialogs for triggers that differ are provided
in the following topics as examples.
Optimize for HF
The Optimize for HF checkbox can be used on an Edge trigger to reject high
or low frequencies.
The checkbox is marked by default; meaning, the instrument is optimized
for high-frequency waveforms.
NOTE: If you are measuring a waveform that is 10 MHz or slower, be sure to
unmark the checkbox to avoid triggering on an incorrect slope.