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3 - Programming the DC Source
26
INITiate:SEQuence2 or
INITiate:NAME ACQuire
After a trigger is received and the data acquisition completes, the trigger system will return to the Idle state
(unless multiple measurements are desired). Thus it will be necessary to initiate the system each time a
triggered acquisition is desired.
NOTE: You cannot initiate measurement triggers continuously. Otherwise, the measurement data
in the data buffer would continuously be overwritten by each triggered measurement.
Selecting the Measurement Trigger Source (Agilent 66312A, 66332A Only)
The trigger system is waiting for a trigger signal in the Initiated state. Before you generate a trigger, you
must select a trigger source. The following measurement trigger sources can be selected:
BUS - selects GPIB bus triggers.
INTernal - selects the dc source’s output as the measurement trigger.
To select GPIB bus triggers (group execute trigger, device trigger, or *TRG command), use:
TRIGger:SEQuence2:SOURce BUS or
TRIGger:ACQuire:SOURce BUS
To select internal triggers (measurements triggered off the output signal) use:
TRIGger:SEQuence2:SOURce INTernal or
TRIGger:ACQuire:SOURce INTernal
Generating Measurement Triggers (Agilent 66312A, 66332A Only)
There is only one measurement converter in the dc source. Before you generate a measurement trigger,
you must specify a measurement acquistion of either voltage or current. To specify a measurement
acquisition use:
SENSe:FUNCtion "CURRent" or
SENSe:FUNCtion "VOLTage"
Providing that you have specified the appropriate trigger source and a measurement acquisition, you can
generate triggers as follows:
GPIB Triggers Send one of the following commands over the GPIB:
TRIGger:IMMediate (not affected by the trigger source setting)
*TRG
a group execute trigger
Internal Triggers To trigger off of the output signal, you must specify the output level that generates
the trigger, the rising or falling edge of the slope, and a hysteresis to qualify trigger
conditions. This is illustrated in figure 3-3.