Technical data

A Using Trigger Holdoff to Synchronize Acquisition/Display on Complex Signals
70 Agilent Infiniium 9000 Series Oscilloscope Evaluation Guide
14 In the Trigger Conditioning dialog, select the Fixed holdoff mode
and enter a holdoff time of 400 µs.
15 Click Close to close the open dialogs.
Holdoff is an under-utilized tool that can achieve stable trigger
conditions on complex signals. The idea is that the trigger will arm on
the first edge of the small envelope and will then ignore the rising
edges of the large envelope as it will not rearm until 400 µs later and
then trigger on the second small envelope.