Agilent Technologies L4400 manual Manual Scanning

Operating and Programming 3

•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	Select interval time mode
TRIG:TIMER 5	Set the scan interval to 5 seconds
TRIG:COUNT 2	Sweep the scan list 2 times
INIT	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	Select bus (manual) mode
TRIG:COUNT 2	Sweep the scan list 2 times
INIT	Initiate the scan

Then, send the *TRG (trigger) command to begin each scan sweep.

Note: To stop a scan, send the ABORt command.

L4400 User’s Guide 73