Chapter 4 Making Measurements 91
SGL SYN SYN After executing the TARM SGL command, followed by the
controller requesting data
2
, which satisfies both SYN events,
the first reading is taken. One reading is then taken per SYN
event until the specified number of readings are completed.
3
The trigger arm event then becomes HOLD.
SGL SYN AUTO, EXT, TIMER,
LINE, LEVEL
After executing the TARM SGL command, followed by the
controller requesting data,
2
one reading is taken per sample
event until the specified number of readings are completed.
3
The trigger arm event then becomes HOLD.
SYN AUTO SYN
After the controller requests data,
2
(which satisfies both SYN
events) the first reading is taken. One reading is then taken
per SYN event until the specified number of readings are
completed.
SYN AUTO AUTO, EXT, TIMER,
LINE, LEVEL
After the controller requests data,
2
one reading is taken per
sample event until the specified number of readings are
completed.
SYN EXT AUTO, EXT, TIMER,
LINE, LEVEL
After the controller requests data,
2
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.
SYN EXT SYN Illegal
SYN LEVEL AUTO, EXT, TIMER,
LEVEL
After the controller requests data,
2
followed by the
occurrence of the LEVEL event,
1
one reading is taken per
sample event until the specified number of readings are
completed
SYN LEVEL SYN, LINE Illegal
SYN LINE AUTO, EXT, TIMER,
LINE
After the controller requests data,
2
followed by the power line
voltage crossing zero volts, one reading is taken per sample
event until the specified number of readings are completed.
SYN LINE SYN, LEVEL Illegal
SYN SGL Any Illegal
SYN SYN SYN
After the controller requests data,
2
all three events are
satisfied and the first reading is taken. One reading is then
taken per SYN event until the specified number of readings
are completed.
SYN SYN AUTO, EXT, TIMER,
LINE, LEVEL
After the controller requests data,
2
both SYN events are
satisfied. One reading is then taken per sample event until the
specified number of readings are completed.
Table 21. Event Combinations
Trigger Arm
Event
Trigger
Event
Sample
Event
Description
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.