Apollo Command Module (Block II) Data Modulator, measuring 4.25″ x 4.5″ x 8.25″, with a Motorola label on the side, reading: "Item Name: Data Modulator, NR/SD Cont No: ME478-0087-0002…Date of Mfr: July 70." There is a NASA inspection stamp near the tag and a white NASA seal over the bottom plate. The sides are stenciled "Eng. Test Only," and one side has ports marked "J1" and "J2." In fine condition.
Terms and abbreviations used in our descriptions.