This demonstration was conducted using a PRED PRI predictor which was installed in the PRED Evaluation Station.  The evaluation Station is a convenient platform for generating emitter patterns and evaluating PRED performance.  A logic analyzer was used to capture the data shown in the examples here.  Raw data and the necessary tools to be able to view the logic analyzer traces can be provided free of charge by MC Countermeasures Inc.

The PRED signals in this interface are:

Video_In:                   Represents the detected video in the environment.

Expected_Video:        (output) This signal is the predicted video output from the PRED aligned to the pattern of the emitter of interest.  This signal can be used by the host system as a trigger for the techniques generator.

Look_Through:          (output) This signal can be used by the host system to control the look-through scheme of the jammer.  The receiver (and therefore the  PRED input) is only turned on during the active high portions.  In this case, the receiver looks through for signals every 1 out of 8 pulses of the emitter of interest.

DRFM_Write:             (output) This signal can be used to control the write-cycle commands of a DRFM in the host system. 

DRFM_Read:              (output) This signal can be used to control the read-cycle commands of a DRFM in the host system, gate out a signal from a VCO or used as a pre-trigger for the existing host system techniques generator.  The position of this signal is specified by the user to occur at a specific range.  (DRFM_Read strobes are not issued during look-through periods)

Lock:                           (output) Indicates when the PRED is locked onto the emitter of interest and generating DRFM commands.

Fade:                          (output) Indicates when the PRED has detected a loss of signal from the emitter of interest.

Stagger_Position:      (output) Indicates the number of stagger positions in the signal being tracked by the PRED.  In this mode of operation (selection of a single emitter), “000” indicates that the PRED has broken lock on a signal and is performing a full acquisition.

EM_ID:                        (output) This 4-bit word is derived from a number of characteristics of the emitter including pulse width, PRI and scanning characteristics.  It can be used by the host system to execute ECM techniques tailored to specific emitter modes.