Agilent Technologies 3458A User Manual page 252

TARM
Remarks
Examples
252 Chapter 6 Command Reference
Default number_arms = 1 (multiple arming disabled)
•
For all measurement functions except sub-sampling (see Chapter 5), the trigger
arm event operates along with the trigger event (TRIG command) and the
sample event (NRDGS or SWEEP command). To make a measurement, the
trigger arm event must occur first, followed by the trigger event, and finally the
sample event.
•
The trigger arm event does not necessarily trigger the multimeter. It merely
enables the trigger event, making it possible for the multimeter to respond to
the trigger event. Refer to "Triggering" in Chapter 4 for an in-depth discussion
of the interaction of the various events.
•
Multiple arming: When using multiple arming, the trigger arm event must be
specified as SGL. When the multimeter executes a TARM command specifying
multiple arming, it holds the GPIB bus until all measurement cycles are
complete. For example, if you specify number_arms as 5, and 10 readings per
cycle (NRDGS command), there are 5 measurement cycles of 10 readings each.
Since it holds the bus, the TARM command must be the last line in the program
and you cannot use the synchronous trigger event or sample event.
•
Query Command. The TARM? query command returns the currently selected
trigger arm event. Refer to "Query Commands" near the front of' this chapter
for more information.
•
Related Commands: NRDGS, SWEEP, TRIG
OUTPUT 722; "TARM AUTO, 0"
10 OUTPUT 722; "TARM HOLD"
20 OUTPUT 722; "OHM"
30 OUTPUT 722; "MEM FIFO
40 OUTPUT 722; "NRDGS 5"
50 OUTPUT 722; "TARM SGL"
60 END
10 OUTPUT 722; "DCV"
20 OUTPUT 722; "TARM HOLD"
30 OUTPUT 722; "TRIG AUTO"
40 OUTPUT 722; "MEM FIFO"
50 OUTPUT 722; "NRDGS 3, AUTO" !3 READINGS PER SAMPLE EVENT (AUTO)
60 OUTPUT 722; "TARM SGL,5"
70 END
In this program, line 60 arms the trigger once for each measurement cycle. This
occurs five times. After the fifth cycle, trigger arming reverts to HOLD. This
program places 15 readings (3 readings per trigger event, 5 times) into reading
memory.
Unless the input buffer is enabled, line 60 causes the GPIB bus to be held until
!AUTO TRIGGER ARMING (ALWAYS ARMED)
!SUSPENDS MEASUREMENTS
!SELECTS 2-WIRE OHMS MEASUREMENTS
!ENABLES READING MEMORY, FIFO MODE
!5 READINGS PER SAMPLE EVENT (AUTO)
!ENABLES ONE SERIES OF MEASUREMENTS
!SELECTS DC VOLTAGE MEASUREMENTS
!SUSPENDS MEASUREMENTS
!SELECTS AUTO AS THE TRIGGER EVENT
!ENABLES READING MEMORY, FIFO MODE
!SELECTS MULTIPLE ARMING FOR 5 CYCLES