Keysight Technologies 3458A Guide D'utilisation page 281

Remarks
– Level triggering can be used for DC voltage, direct-sampling, and
– Because of hysteresis, the actual level triggering point is the specified
– Autozero should be disabled when using level triggering (AZERO OFF
– Query command: The LEVEL? query command returns two responses
– Related commands: DCV, DSAC, DSDC, LFILTER, NRDGS, SETACV, SYNC,
Example
10 OUTPUT 722;"TARM HOLD" !SUSPENDS TRIGGERING
20 OUTPUT 722;"PRESET DIG" !FAST DCV MEASUREMENTS, 10 V RANGE
30 OUTPUT 722;"TRIG LEVEL" !SELECT LEVEL TRIGGER EVENT
40 OUTPUT 722;"SLOPE POS" !TRIGGER ON POSITIVE SLOPE OF SIGNAL
50 OUTPUT 722;"LEVEL 50,AC" !TRIGGER AT 50% OF 10 V RANGE (5 V)
AC-COUPLED
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Keysight 3458A User's Guide
sub-sampling. (The LEVEL command also affects the zero crossing threshold
and the input signal coupling for frequency and period measurements.) For DC
voltage and direct-sampling, level triggering can be used as the trigger event
(TRIG LEVEL command) or the sample event (NRDGS n, LEVEL command). For
sub-sampling, level triggering can be used for the sync source event only
(SSRC LEVEL command).
percentage ±4% of the measurement range.
command) for DC voltage measurements. (Autozero doesn't apply to direct- or
sub-sampling.)
separated by a comma. The first response is the currently specified
percentage. The second response is the present coupling mode. Refer to
Query commands near the front of this chapter for more information.
SLOPE, SSAC, SSDC, SSRC, TRIG
Command Reference 6
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