Agilent Technologies 4349B Manual page 142

4349B
Trigger System
This section provides information about the trigger system of the 4349B. SCPI de nes the
common trigger model for several types of instruments. The trigger system allows you to have
detailed control of the measurement process.
The description of the following information requires more technical expertise than most other
topics covered in this chapter. But you can avoid the need to learn the information in this
section about using the commands for making measurements.
4349B Trigger System Con guration
The trigger system synchronizes the 4349B measurement with speci ed events. An event
includes GPIB trigger commands or an input trigger pulse input through the External
Trigger connector. The Trigger system also allows specifying the number of times to repeat
measurement and the delays between measurements.
Figure 5-6. Trigger System Con guration
Figure 5-6 shows con guration of the 4349B trigger system. Each undashed block is called a
trigger state. The 4349B moves between adjacent trigger states depending on its conditions.
Power ON state is called idle state. You can force the 4349B to the idle state using the
or commands. The initiate and TRIGger Event Detection state causes the 4349B
program to branch when speci ed conditions are met or not. The Sequence Operation state
signals the instrument hardware to take measurement and listens for the signal that indicates
the measurement has been taken.
Idle State
The trigger system remains in the idle state until it is initiated by or
. Once one of these conditions is satis ed, the trigger system exits
downward to the initiate state. Note that sets .
5-38 GPIB Reference