Keysight Technologies 3458A Guide D'utilisation page 280

6 Command Reference
LEVEL
The LEVEL command specifies the level triggering voltage (as a percentage of the
present range) and the coupling (AC or DC) for level triggering. A level trigger
event occurs when the input signal reaches the specified voltage on its
positive-going or negative-going slope as specified by the SLOPE command.
Syntax
LEVEL [percentage][,coupling]
percentage
Specifies the percentage of the present range for level triggering. The valid range
for this parameter is -500% to +500% in 5% steps for direct- or sub-sampling or
-120% to 120% in 1% steps for DC voltage (refer to
Power-on percentage = 0% (0 V).
Default percentage = 0% (0 V).
The full scale values for direct-sampling are 500% (5 times) the ranges of 10 mV
100 mV, 1 V, 10 V, and 100 V. When specifying the level triggering percentage,
remember to use a percentage of the range. For example, assume the input signal
has a peak value of 20 V and you are using the 10 V range. If you want to level
trigger at 15 V, you would specify a level triggering percentage of 150% (LEVEL
150 command).
coupling
The coupling parameter selects the coupling of the signal to the level-detection
circuitry only. This does not affect the coupling of the signal being measured.
coupling
parameter
DC
AC
Power-on coupling = AC.
Default coupling = AC.
280
Numeric
Description
query equiv.
1 Selects DC-coupled input to level-detection circuitry
2 Selects AC-coupled input to level-detection circuitry
Chapter 5 for details).
Keysight 3458A User's Guide