Checking this box activates the source list sequencer in the test set.
When the source list sequencer is on, the source is controlled by it. When the source list sequencer is off, the source operates independently of it.
While the Source Sequencer State box is checked, the Include Src in Seq box is enabled for checking or unchecking.
When Source Sequencer State is unchecked, the Include Src in Seq box is unchecked and disabled.