Model 6220/6221 Reference Manual Triggering 8-17
Return to Section 8 topics
A. Operation of the Model 622x starts at point A in the flowchart where it waits
for an external trigger.
B. Pressing STEP takes Model 7001/7002 out of idle and places operation at
point B in the flowchart.
C. For the first pass through Model 7001/7002, the scanner does not wait at
point B. Instead, it closes the first channel (point C).
D. After the relay settles, Model 7001/7002 outputs a trigger pulse, and opera-
tion loops back to point B where it waits for an input trigger.
E & F. With the Model 622x at point A, the output trigger pulse from Model 7001/
7002 triggers a measurement of DUT #1 (point E). After the source current
is ready, the Model 622x outputs a trigger pulse and then loops back to
point A where it waits for another input trigger.
The trigger applied to Model 7001/7002 from the Model 622x closes the next
channel in the scan, which then triggers the Model 622x to output the sweep point
current to that DUT. This process continues until all 10 channels are scanned.
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