|Object Type:||Data Storage|
|Object Name:||TDM Assembly|
|Year of Manufacture:||Unknown|
|Location:||Grey Dexion Shelf Unit [Main Store]|
GEC-Marconi Avionics Ltd
TDM Assy. Part No. 047-011-01
Ser No. 0051 NSN Code K0656
This is the TDM (Transfer Data Cartridge?) onto which the mission planning data is loaded at the ground workstation. The cartridge plugs into the drawer in the Data Entry Unit (ODMI0230, ODMI0558). The data cartridge itself has to be rugged and reliable with a high data integrity and the ability to download fast. A typical cartridge has about 4Mbyte solid state non-volatile memory so that no battery backup is needed.
The 12 round glass-windowed photo-transistors, interspersed with photo-diodes form a 12-bit electro-optical data interface that is more rugged than normal mechanical electrical connectors. The Data Entry Unit will have a similar electro-optical array within it.