User`s guide

Description
The 34411A and L4411A (but not the 34410A) allow you to trigger on a
defined level of the input signal. This command sets the level on which a
trigger occurs when the trigger source is set to INTernal (see
TRIGger:SOURce).
It is recommended that all triggered measurements be made using
an appropriate fixed manual range. That is, turn autorange off
(SENSe:<function>:RANGe:AUTO OFF), or set a fixed range using
the SENSe:<function>:RANGe, CONFigure, or MEASure command.