8-6 Return to Section Topics 6482-901-01 Rev. A / August 2012
Section 8: Triggering Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
Bench defaults
The bench defaults are listed as follows. They are also denoted in Figure 8-1 by the “+” symbol.
• Arm-In Event = IMMEDIATE
• Trigger-In Source = IMMEDIATE
• Arm Count = 1
• Trigger Count = 1
• Trigger Delay = 0.0 seconds
• Delay Action = 0.0005 seconds
• Source trigger in event = On
• Delay trigger in event = Off
• Measure Trigger In Event = Off
• Trigger out events = All trigger out events are disabled (off)
• Arm out events = Off
• Event detection bypasses = NEVER (both layers)
When the output is turned ON, the Model 6482 will run in a continuous loop around the trigger
model. After each measure action, operation will continue at the top of the trigger model. The
Model 6482 can be returned to an idle state by turning the output OFF.
Operation summary
The trigger model is designed to make source and measure applications more versatile. Typically,
it allows you to perform a specified number of measurements at differing source levels.
For example, assume you want to perform three measurements each at two different channel 1
voltage bias source levels (1 V and 2 V). To do this, set the arm count to two, the trigger count to
three (3), select SRC1, and use a 6-point custom sweep configured as follows:
P0000 = 1 V
P0001 = 1 V
P0002 = 1 V
P0003 = 2 V
P0004 = 2 V
P0005 = 2 V
When the sweep is started, operation falls into the Trigger Layer and performs three
measurements at the 1 V source level. Operation then loops back into the Trigger Layer to perform
three measurements at the 2 V source level. The six readings are stored in the buffer.
Note that after the sweep is finished, the Model 6482 does not return to an idle state. Operation
continues at the top of the trigger model. Subsequent measurements are performed at the 2 V
level and are not stored in the buffer.
For details on the custom sweep, see Section 7.
Trigger link
Input and output triggers are received and sent through the rear panel Trigger Link connector. The
Trigger Link has four lines. At the factory, line #2 is selected for output triggers, and line #1 is
selected for input triggers. These input/output line assignments can be changed from the
CONFIGURE TRIGGER menu. See “Configuring triggering,” page Section 8-12. The connector
pinout is shown in Figure 8-2.
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