Agilent Technologies 4338B, Operation Manual

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Trigger System 4338B
Initiate State
If the trigger system is on a downward path, it travels directly through the initiate state
without restrictions . If the trigger system is on an upward path, and INITiate:CONTinuous is
ON , then it exits downward to an event detection state . If the trigger system is on an upward
path and INITiate:CONTinuous is OFF , then it exits upward to the idle state .
Event Detection State
Figure 5-7. Inside an Event Detection State
SOURce The :TRIGger:SOURce command species which particular input can generate
the event required to continue the downward trigger path. If the source
chosen is a non-analog signal such as BUS , then no further qualications are
required to generate an event. However , if an INTernal or EXTernal analog
signal is chosen, additional qualications may apply .
DELay The :TRIGger:DELay command allows you to specify a time delay after the
trigger signal is detected to the start of the measurement. F or example , you
may want to delay acquiring data until 5 milliseconds after the positive edge to
allow the measurement signal to settle . F or example using a delay time allows
relay contacts to stop bouncing before making a measurement. Sending *RST
sets DELay to zero .
IMMediate The :TRIGger:IMMeditate command bypasses event detection, DELay
qualications one time . The upward path through the event detection state
contains only one condition. If the condition is satised, the trigger system
exits upward.
Sequence Operation State
The downward entrance to the sequence operation state forces the 4338B to start a
measurement. An upward exit is not allowed until the measurement is complete .
5-40 GPIB Reference
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