MDO4TRIG - 

The optional MDO4TRIG application module provides advanced RF triggering. This module enables the RF input power level to be used as a source for Sequence, Pulse Width, Timeout, Runt, and Logic trigger types.
For example, you can trigger on a RF pulse of a specific length or use the RF channel as an input to a logic trigger, enabling the oscilloscope to trigger only when the RF is on while other signals are active.