Apollo Command Module Up-Data Link (UDL) equipment manufactured by Motorola, measuring approximately 9″ x 17.5″ x 6.5″, with a tag on the end reading: "Up-Data Link, Digital, NE/S & D ME470-0101-0004…Mfd by Motorola for Apollo Spacecraft, Motorola Part No. 01-23760G03, Contract No. M9J7XA-N-485203A," with the serial number and date of manufacture illegible. The unit is labeled "C28-1A103” on the top, and features connectors “J1” through “J5” on top, and another, “J6,” on the side. In fine condition. The up-data link consists of detecting and decoding circuitry, a buffer storage unit, output relay drivers, and a power supply, and provides the means for the ground to update the computer and the central timing equipment of the spacecraft. The device could receive, verify, and distribute digital updating information sent from the Manned Space Flight Network at various times throughout the mission.
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