Model 6485 Picoammeter Instruction Manual Triggering 7-7
Output triggers
Model 6485 can send out an output trigger (via the rear panel TRIGGER LINK connector)
right after the measure action and/or when operation leaves the trigger layer. An output
trigger can be used to trigger another instrument to perform an operation (e.g., select the
next output step for a source).
Counters
Programmable counters are used to repeat operations within the trigger model layers. For
example, if the trigger count is set for 10, operation will keep looping around in the trigger
layer until 10 measurements are performed. If the arm count is set to 2, operation will then
loop back through the arm layer and go back into the trigger layer to perform 10 more
measurements.
Trigger model configuration — front panel
NOTE See “SCPI Programming” (Table 7-3) for the SCPI commands to configure the
trigger model over the bus.
Press CONFIG and then TRIG to configure both the TRIG and ARM layers of the trigger
model.
NOTE When done configuring the trigger level, press ENTER to confirm value and then
use the EXIT key to save changes and leave trigger model configuration.
Once in trigger model configuration mode, use the and range keys to display either
the TRIGGER layer or the ARM layer menus. Press ENTER to select the desired menu.
Then use the and range keys to display menu items. Use the cursor ( and ) and the
and keys to key in values. A menu item or value is selected by pressing ENTER. Use
the EXIT key to exit from the menu (saving all changes made).
Table 7-2
Trigger model menu structure
Menu Description
CONFIG Path to TRIG and ARM menus. Access by pressing
CONFIG and then TRIG.
- TRIG Path to TRIG layer sub-menus
--COUNT
---INF
---FIN
Set TRIG measure count
Specify an INFinite measure count
Specify a FINite measure count: 1–2500
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