Receiver Blanking

Receiver blanking is used by many ECM systems.  PRI prediction can be used to correctly place false targets during these blanking intervals with good results.  This clip shows the PRED tracking an 8-element / 128-position staggered PRI pattern.  It clearly shows the effects of blanking the input video for a few seconds.  The output strobes are correctly placed throughout the entire blanking period.  When the signal returns, the PRED automatically performs a fast re-acquisition and adjusts the position of the output strobes to minimize timing errors.

In each of the videos, the top (yellow) trace of the oscilloscope shows the video signal input to the PRED.  The bottom (blue) trace shows the output of the PRED which can be used as the DRFM_Read strobe or to modulate a VCO.

click here to begin the video clip