Keysight Technologies 3458A Guide D'utilisation page 133

Making Measurements 4
Making delayed readings
The DELAY command allows you to specify a time interval that is inserted
between the trigger event and the first sample event. For example, in the
following program, the specified delay interval is 2 seconds and the SWEEP
interval is 1 second. Line 40 specifies 8 readings per trigger event. Figure 4-4
shows that the delay occurs between the trigger event (TRIG SGL) and the first
reading. The SWEEP interval then occurs between each successive reading. In
this example, the amount of time added to the total measurement is 9 seconds.
10 OPTION BASE 1!COMPUTER ARRAY NUMBERING STARTS AT 1
20 DIM Rdgs(8)!DIMENSION ARRAY FOR READINGS
30 OUTPUT 722;"PRESET NORM"!TARM AUTO, TRIG SYN, DCV AUTORANGE
40 OUTPUT 722;"SWEEP 1,8"!1 SECOND INTERVAL, 8 READINGS/TRIGGER
50 OUTPUT 722;"DELAY 2"!2 SECOND DELAY
60 ENTER 722;Rdgs(*)!ENTER READINGS
70 PRINT Rdgs(*)!PRINT READINGS
80 END
Figure 4-4 DELAY with SWEEP (or TIMER)
Default delays
If you have not specified a delay interval, the multimeter automatically determines
a delay time (default delay time) based on the present measurement function,
range, resolution, and the AC bandwidth setting. This delay time is actually the
settling time allowed before readings, which ensures accurate measurements. The
default delay time is updated automatically whenever the function range,
resolution, or AC bandwidth changes. However, once you specify a delay time
value, the value does not change until you execute RESET or a PRESET command,
cycle power, specify another delay value, or default the delay parameter (DELAY
-1 command which returns to the automatic delay). The following program uses
Keysight 3458A User's Guide 133