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Model 6487 Reference Manual
Figure 7-9
Operation model for triggering example
Details of this testing process are explained in the following paragraphs and are referenced
to the operation model shown in
A.
B.
C.
D.
E. and F.
7001or 7002
Press STEP to start scan
Idle
Bypass
B
Wait for
Trigger Link
Trigger
Scan
C
Channel
Trigger
Output
D
Trigger
Scanned
No
10
Channels
?
Yes
Operation of the Model 6487 starts at point A in the flowchart where it waits for
an external trigger.
Pressing STEP takes Model 7001/7002 out of idle and places operation at point
B in the flowchart.
For the first pass through Model 7001/7002, the scanner does not wait at point
B. Instead, it closes the first channel (point C).
After the relay settles, Model 7001/7002 outputs a trigger pulse. Since the
instrument is programmed to scan 10 channels, operation loops back to point B
where it waits for an input trigger.
With the Model 6487 at point A, the output trigger pulse from Model 7001/7002
triggers a measurement of DUT #1 (point E). After the measurement is com-
plete, the Model 6487 outputs a trigger pulse and then loops back to point A
where it waits for another input trigger.
6487
Idle
A
Wait for
Trigger Link
Trigger
Make
Measurement
Trigger
Output
Trigger
Made
10
Measurements
?
Yes
Figure
7-9.
Triggering
E
F
No
7-15
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