Keysight Technologies 3458A Guide D'utilisation page 135

Making Measurements 4
10 OPTION BASE 1!COMPUTER ARRAY NUMBERING STARTS AT 1
20 DIM Rdgs(10)!DIMENSION ARRAY FOR READINGS
30 OUTPUT 722;"PRESET NORM"!TARM AUTO, TRIG SYN, DCV AUTORANGE
40 OUTPUT 722;"NRDGS 10,EXT"!10 READINGS/TRIGGER, EXTERNAL SAMPLE EVENT
50 ENTER 722;Rdgs(*)!ENTER READINGS
60 PRINT Rdgs(*)!PRINT READINGS
70 END
Refer to the "EXTOUT Signal" later in this chapter, for examples showing how to
NOTE
synchronize the multimeter to an external scanning device.
External trigger buffering
Trigger buffering corrects for an error (TRIGGER TOO FAST) that can occur when
using the external (EXT) trigger arm, trigger, or sample event. With trigger
buffering disabled, any external trigger signal that occurs during a rending
generates the TRIGGER TOO FAST error and the trigger(s) are ignored. With
trigger buffering enabled, the first external trigger that occurs during a reading is
stored and no error is generated by this or any successive triggers. After the
reading is complete, the stored trigger satisfies the EXT event if the multimeter is
so programmed. Trigger buffering is useful when you are using an external
scanning device synchronized to the multimeter's EXTOUT signal using the input
complete (ICOMP) event. Since the ICOMP pulse occurs before each reading is
finished, it is possible for the scanner to close the next channel and generate its
channel closed pulse (which is used to trigger the multimeter) before the reading
is complete. (Refer to Input complete, later in this chapter, for more information.)
In the multimeter's power-on state, trigger buffering is disabled. To enable trigger
buffering, send:
OUTPUT 722;"TBUFF ON"
To disable trigger buffering, send:
OUTPUT 722; "TBUFF OFF"
Keysight 3458A User's Guide 135