Project - How to onstruct a circuit to introduce and control a 0-300ms delay in an RF feed from a Sky Box to multiple TV sets?
Delaying an RF signal by a large amount of time while keeping the distortion low, with a reasonable bandwidth is actually quite difficult. A SAW delay line (Surface Acoustic Wave) may be the solution but 200 ms is quite large, the one I have seen are limited to hundreds of microseconds.