My understanding is HPRF PD, at a sufficiently high duty cycle, is virtually the same as CW. Hence the term “Interrupted CW” (see reference below) I could be wrong but why couldn’t the PD signal be routed through the flood antenna?
From Radar Handbook 2nd Ed., Slonik:
The 7F seeker was a conical scan type whereas the AIM-7M (M for monopulse:smilewink:) employed an inverse monopulse seeker which is not compatible with CW illumination.
From Radar Handbook 2nd Ed., Slonik: