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Reverse Engineering the Mysterious Up-Data Link Test Set from Apollo
Back in 2021, a collector friend of ours was visiting a dusty warehouse in search of Apollo-era communications equipment. A box with NASA-st...
The Up-Data Link was mounted above the AC power inverters, below the Apollo Guidance Computer, and to the left of the waste management system and urine bags. Based on the type of message, specified by the System Address digit, the Test Set validates the UDL's response and indicates success or errors on the panel lights. Moreover, we have used the Test Set to control an Up-Data Link box, a CTE clock, and a simulated Apollo Guidance Computer, reading commands from the paper tape and sending them through the complete communication path.
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