I am running a Frequency Mask Trigger on the RSA6106A+ but when I run it my DPX display is blank. Why?

I am running a Frequency Mask Trigger on the RSA6106A+ but when I run it my DPX display is blank. Why?

The DPX display updates 48,000 times a second to show great detail. This requires the processor's full capabilities.
It is not possible to run both the Frequency Mask Trigger and the DPX display at the same time. The normal spectrum display will capture the signals when seen by the Frequency Mask Trigger.