Camera Properties If you are going to use Shaft Encoder as the trigger(s), you have to set it up with the Shaft Encoder Trigger tab. Shaft Encoder Trigger This tab is only displayed if a line scan camera is connected. The Shaft Encoder Trigger tab lets you set the encoder signals to be used to trigger the frame and line start signals. ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 342