Agilent Technologies L4400 - Manual (Page 85)

Operating and Programming 3
L4400 User’s Guide 73
• Mx+B scaling and alarm limits (L4450A, L4452A) are applied to
measurements during a scan and all data is stored in volatile memory.
• The CONFigure and MEASure? commands (L4450A, L4452A)
automatically set the scan interval to immediate (0 seconds) and the
scan count to 1 sweep.
• The instrument sets the scan interval to immediate (0 seconds) after a
Factory Reset ( *RST command). An Instrument Preset ( SYSTem:PRESet
command) or Card Reset ( SYSTem:CPON command) does not change

the setting.
The following program segment configures the instrument for an interval
scan.

TRIG:SOURCE TIMER

TRIG:TIMER 5

TRIG:COUNT 2

INIT
Select interval time mode

Set the scan interval to 5 seconds

Sweep the scan list 2 times

Initiate the scan
Note: To stop a scan, send the ABORt command.
Manual Scanning
In this configuration, the instrument waits for a command before
sweeping through the scan list.
• All readings from the scan are stored in volatile memory.

Readings accumulate in memory until the scan is terminated

(until the trigger count is reached or until you abort the scan).
• You can specify a trigger count which sets the number of scan trigger
commands that will be accepted before terminating the scan. See
“Trigger Count" on page 75 for more information.
• Mx+B scaling and alarm limits (L4450A, L4452A) are applied to
measurements during a manual scanning operation and all data is
stored in volatile memory.
The following program segment configures the instrument for a manual
scanning operation.

TRIG:SOURCE BUS

TRIG:COUNT 2

INIT
Select bus (manual) mode

Sweep the scan list 2 times

Initiate the scan
Then, send the *TRG (trigger) command to begin each scan sweep.

Note: To stop a scan, send the ABORt command.