Agilent Technologies 3458A User Manual page 89

Trigger Arm Trigger
Event Event
AUTO AUTO Any
AUTO EXT AUTO, EXT, TIMER,
LINE, LEVEL
AUTO EXT SYN
AUTO LEVEL AUTO, EXT, TIMER,
LEVEL
AUTO LEVEL SYN, LINE
AUTO LINE AUTO, EXT, TIMER,
LINE
AUTO LINE SYN, LEVEL
AUTO SGL Any
AUTO SYN SYN
AUTO SYN AUTO, EXT, LEVEL,
LINE, TIMER
EXT AUTO Any
EXT EXT AUTO, EXT, TIMER,
LINE, LEVEL
EXT EXT SYN
EXT LEVEL AUTO, EXT, TIMER,
LEVEL
EXT LEVEL SYN, LINE
1
The LEVEL event occures when the specified voltage is reached on the specified slope of the input
signal. The LEVEL trigger event or sample event can only be used for DC voltage or direct-sampled
measurements.
2
The output buffer must be empty and reading memory must be OFF or empty for the SYN event to occur.
3
The input buffer must be enabled or you must suppress cr lf when sending the TARM SGL command.
Table 21. Event Combinations
Sample
Event
One reading is taken per sample event (if the sample event is
AUTO, readings are taken continuously).
After a negative edge transition on the Ext Trig input, one
reading is taken per sample event until the specified number
of readings are completed.
Illegal
After the LEVEL event
sample event, until the specified number of readings are
completed.
Illegal
After the power line voltage crosses zero volts, one reading is
taken per sample event until the specified number of readings
are completed.
Illegal
After executing the TRIG SGL command, one reading is
taken per sample event until the specified number of readings
are completed. The trigger event then becomes HOLD. When
using the SYN sample event, the input buffer must be
enabled or you must suppress cr lf when sending the TRIG
SGL command.
After the controller requests data,
satisfied and the first reading is taken. One reading is then
taken per SYN event until the specified number of readings
are completed.
After the controller requests data,
sample event until the specified number of readings are
completed.
After a negative edge transition on the Ext Trig input, one
reading is taken per sample event until the specified number
of readings are completed.
After two negative edge transitions on the Ext Trig input, one
reading is taken per sample event until the specified number
of readings are completed.
Illegal
After a negative edge transition on the Ext Trig input followed
by the occurrence of the LEVEL event
per sample event until the specified number of readings are
completed.
Illegal
Description
1
occurs, one reading is taken per
2
both SYN events are
2
one reading is taken per
1
Chapter 4 Making Measurements
, one reading is taken
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