Agilent Technologies 3458A User Manual page 90

Trigger Arm
Event
EXT
EXT
EXT
EXT
EXT
HOLD
AUTO, EXT,
SGL, SYN
SGL
SGL
SGL
SGL
SGL
SGL
SGL
SGL
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.
90 Chapter 4 Making Measurements
Table 21. Event Combinations
Trigger Sample
Event Event
LINE AUTO, EXT, TIMER,
LINE
LINE SYN, LEVEL
SGL ANY
SYN SYN
SYN AUTO, EXT, TIMER,
LINE, LEVEL
Any Any
HOLD Any
AUTO Any
EXT AUTO, EXT, TIMER,
LINE, LEVEL
EXT SYN
LEVEL AUTO, EXT, TIMER,
LEVEL
LEVEL SYN, LINE
LINE AUTO, EXT, TIMER,
LINE
LINE SYN, LEVEL
SGL Any
Description
After a negative edge transition on the Ext Trig input followed
by the power line voltage crossing zero volts, one reading is
taken per sample event until the specified number of readings
are completed.
Illegal
Illegal
After a negative edge transition on the Ext Trig input followed
by the controller requesting data
events), the first reading is taken. One reading is then taken
per SYN event until the specified number of readings are
completed.
After a negative edge transition on the Ext Trig input,
followed by the controller requesting data
taken per sample event, until the specified number of
readings are completed.
No readings taken until the trigger arm event is changed.
No readings taken until the trigger event is changed. When
using the SGL trigger arm event and the SYN sample event,
the input buffer must be enabled or you must suppress cr lf
when sending the TARM SGL command.
After executing the TARM SGL command, one reading is
taken per sample event until the specified number of readings
are completed. The trigger arm 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 TARM
SGL command.
After executing the TARM SGL command followed by a
negative edge transition on the Ext Trig input, one reading is
taken per sample event, until the specified number of
readings are completed. The trigger arm, event then
becomes HOLD.
Illegal
After executing the TARM SGL command followed by the
occurrence of the LEVEL event,
sample event until the specified number of readings are
completed. The trigger arm event then becomes HOLD.
Illegal
After executing the TARM SGL command followed by the
power line voltage crossing zero volts, one reading is taken
per sample event until the specified number of readings are
completed. The trigger arm event then becomes HOLD.
Illegal
Illegal
2
(which satisfies both SYN
2
one reading is
1
one reading is taken per