Keithley 6482 Reference Manual page 114

Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
Figure 8-7
Operation model for triggering example
Press STEP to start scan
C
D
No
A) Turning the Model 6482 output on places it at point A in the flow chart, where it waits for an
external trigger.
B) Pressing the STEP key takes the Model 7001/7002 out of the idle state and places operation at
point B in the flow chart.
C) For the first pass through the model, the scanner does not wait at point B. Instead, it closes the
first channel (point C).
D) After the relay settles, the Model 7001/7002 outputs a trigger pulse. Because the instrument is
programmed to scan 10 channels, operation loops back to point B, where it waits for an input
trigger.
E) and F) With the Model 6482 operation at point A, the output trigger pulse from the Model 7001/
7002 triggers a measurement of device under test (DUT) #1 (point E). After the measurement is
complete, the Model 6482 outputs a trigger pulse and then loops back to point A, where it waits for
another input trigger.
The trigger applied to the Model 7001/7002 from the Model 6482 closes the next channel in the
scan, which then triggers the Model 6482 to measure that device under test (DUT). This process
continues until all 10 channels are scanned and measured.
6482-901-01 Rev. A / August 2012
7001 or 7002
Idle
Bypass
B
Wait for
trigger link
trigger
Scan
channel
Trigger
Output
trigger
Scanned
10
channels
?
Yes
Return to
Model 6482
Idle
A
Wait for
trigger link
trigger
Make
E
measurement
Trigger
Output
F
trigger
Made
10 No
measurements
?
Yes
Section Topics
Section 8: Triggering
8-11