Talking with the Moon: Inside Apollo's premodulation processor

.hilite {cursor:zoom-in} a:link img.hilite, a:visited img.hilite { color: #fff;} The Apollo missions to the Moon required complex hardware to communicate between Earth and the spacecraft, sending radio signals over hundreds of thousands of miles. The premodulation processor was a key component of this system, combining voice, scientific data, TV, and telemetry for transmission to Earth.1 It was built from components that were welded together and tightly packed into a 14.5-pound box.2 In th...

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