Agilent Technologies 3458A User Manual

TARM
252 Chapter 6 Command Reference
Default number_arms = 1 (multiple arming disabled)
Remarks • 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
Examples OUTPUT 722; "TARM AUTO, 0" !AUTO TRIGGER ARMING (ALWAYS ARMED)
10 OUTPUT 722; "TARM HOLD" !SUSPENDS MEASUREMENTS
20 OUTPUT 722; "OHM" !SELECTS 2-WIRE OHMS MEASUREMENTS
30 OUTPUT 722; "MEM FIFO !ENABLES READING MEMORY, FIFO MODE
40 OUTPUT 722; "NRDGS 5" !5 READINGS PER SAMPLE EVENT (AUTO)
50 OUTPUT 722; "TARM SGL" !ENABLES ONE SERIES OF MEASUREMENTS
60 END
10 OUTPUT 722; "DCV" !SELECTS DC VOLTAGE MEASUREMENTS
20 OUTPUT 722; "TARM HOLD" !SUSPENDS MEASUREMENTS
30 OUTPUT 722; "TRIG AUTO" !SELECTS AUTO AS THE TRIGGER EVENT
40 OUTPUT 722; "MEM FIFO" !ENABLES READING MEMORY, FIFO MODE
50 OUTPUT 722; "NRDGS 3, AUTO" !3 READINGS PER SAMPLE EVENT (AUTO)
60 OUTPUT 722; "TARM SGL,5" !SELECTS MULTIPLE ARMING FOR 5 CYCLES
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

Agilent Technologies 3458A Specifications

General

Brand	Agilent Technologies
Model	3458A
Category	Multimeter
Language	English