|Category:||Head-Up Display [HUD]|
|Object Name:||Adder Memory Circuit Board|
|Manufacturer:||Marconi-Elliott Avionic Systems Ltd|
|Division:||Airborne Display [ADD]|
|Year of Manufacture:||circa 1968|
|Location:||Rack RAA03 [Main Store]|
Drg. No. DL63-11540 Iss: D.
Ser. No. D003
The HUD Electronics Unit is a computer and as such contains digital circuits which are used to calculate by addition. The output of the summation is stored in temporary memory subject to the computer program. There are four Adder/Memory cards needed in the A-7 HUD EU because of the limited capability of the TTL chips at the time.