Issue
There is no way to perform a manual waveform trigger with ION Setup 2.0

Product Line
ION Setup 2.0, ION7500, ION7550,ION 7600, ION7650, ION8400, ION8500

Environment
Waveform Capture

Cause
By default ION Setup does not provide a way to manually trigger a waveform.

Resolution
*Warning: Take backups of any files prior to modifying them. Ensure the backups are in a location that will not be overwritten (i.e. the Desktop).

The recommended solution is to upgrade to a version of ION Setup 3.0 which has included the manual waveform trigger.
Link to latest ION Setup Software

If an upgrade to ION Setup 3.0 is not possible then the below solution will work:

What ION Setup displays is determined by the setup tables. Look in the IONSetup/tables directory and you will see one subdirectory for each meter type.  Inside you can find a file called Enables.pml.

Edit this Enables.pml:

1. Replace the Rows=5 line with Rows=6
2. Add into Page1 after the R5C4 entry:
R6C2=0x68b9,1,0,WavefrmTrig

The handle 0x68b9 is the handle of the External Pulse module that triggers waveforms on the 7500/7600/8400/8500 meters.