Airborne Electronic Warfare Reconnaissance System
The AN/APA-74 analyzes the video signals received from either of 2 receivers. A fivegun cathode ray tube displays pulse repetition frequency, pulse width, and rise time of the intercepted signal. The limits on pulse repetition frequency are 20 cps to 4,000 cps, while any pulse width of 0.2 to 50 usec can be displayed.
This unit appears to be new. The wrapping paper was pulled back far enough to get these these photos.
Below is a closeup of the hang tag that is attached to it.
Click on the file icon below to download a PDF of a formally classified SECRET, now declassified document describing the system that this unit was part of.