communication satellite, not for espionage

I have seen Bias Tee injectors for up to 50v@1.5A, thats enough for a decent output booster. But yes in reality 99% of those where used for preamps in analog TV/Radio Rx

Shellgame time

IR homing sensors before the digital age where a piece of analog signalpath art. Its mostly rotating a singular ir sensor in 45degree and then mapping the inputs rotation compensated to the control surfaces. Simple at core but cant tell the difference between a jet exhaust, the sun, or a flare.

Modern version are boring is a High resolution ir cam and some blackmagic AI picking targets apart from flares.

source for the information in the title: i made it up, or did i?