Agilent Technologies 34401A manual Triggering Commands, Read?

Chapter 4 Remote Interface Reference

Triggering Commands

Triggering Commands

See also “Triggering,” starting on page 71 in chapter 3.

INITiate

Change the state of the triggering system from the “idle” state to the “wait-for-trigger” state. Measurements will begin when the specified trigger conditions are satisfied after the INITiate command is received. The readings are placed in the multimeter’s internal memory (up to 512 readings can be stored). Readings are stored in memory until you are able to retrieve them. Use the FETCh? command to retrieve reading results.

A new command is available starting with firmware Revision 2 which allows you to take readings using INITiate without storing them in internal memory. This command may be useful with the min-max operation since it allows you to determine the average of a series of readings without storing the individual values.

DATA:FEED	RDG_STORE, ""	do not store readings
DATA:FEED	RDG_STORE, "CALCulate"	store readings (default)

See page 126 for more information on using the DATA:FEED command.

READ?

Change the state of the trigger system from the “idle” state to the “wait-for-trigger” state. Measurements will begin when the specified trigger conditions are satisfied following the receipt of the READ? command. Readings are sent immediately to the output buffer.

TRIGger:SOURce {BUSIMMediateEXTernal}

Select the source from which the multimeter will accept a trigger. The multimeter will accept a software (bus) trigger, an immediate internal trigger (this is the default source), or a hardware trigger from the rear-panel Ext Trig (external trigger) terminal. [Stored in volatile memory]

TRIGger:SOURce?

Query the present trigger source. Returns “BUS”, “IMM”, or “EXT”.

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