Keithley 6487 Reference Manual

7-2 Triggering Model 6487 Reference Manual
Trigger models
The flowcharts in Figure 7-1 and Figure 7-2 summarize triggering for the Model 6487.
They are called trigger models because they are modeled after the SCPI commands to con-
trol triggering (operation).
Figure 7-1
Trigger model — front panel operation
Arm-In
Source
Immediate
GPIB
Timer
Manual
TLink
/STest
STest
BSTest
Arm Event
Detector
Trigger Event
Detector
Trigger Delay
MEASURE
Action
No
Yes
Idle
Another
Arm
?
Another
Trigger
?
Yes
No
Arm
Layer
Trigger
Layer
Trigger-In
Source
Yes
Halt
?
No
Once
Bypass
Arm Event
Detector
?
Never
Bypass
Trigger Event
Detector
?
Once
Never
Output Trigger
(VMC)
On/Off
Trigger
Count
1
Output
Trigger
(TL Done)
On/Off
Arm
Count
INF
Immediate
TLINk
Press HALT
Turn 6487 ON
0.0 sec
Factory Default
Output Trigger
✛
✛
✛
✛
✛
✛
✛
✛
✛
✛

Keithley 6487 Specifications

General

Type	Picoammeter/Voltage Source
Current Measurement Range	20 fA to 20 mA
Interfaces	GPIB, RS-232
Voltage Burden	< 200 µV
Input Impedance	>10^14 Ω
Power	100 V / 120 V / 220 V / 240 V
Basic Current Measurement Accuracy	0.4%