Monochrome Head-Down Display

Technical Information

Catalogue No: C0069
Category: Head-Down Display [HDD]
Object Type: Display Unit
Object Name: Monochrome Head-Down Display
Part No: 62 D 6202
Serial No: 006
Manufacturer: Marconi Avionics
Division: Unknown
Platform(s):
Year of Manufacture: circa 1978
Dimensions:
Width (mm):
200 
Height (mm):
210 
Depth (mm):
400 
Weight (g):
13,080 
Location: Archive Object Store
Inscription(s):

Marconi Avionics Limited
H.C.D.U. Mk7
Part 62 D 6202
Ser. No 006
NSN
K0656
────────────────
T.&.S.R.L.
Asset No. 175009

Notes:

Six general purpose high contrast display units were manufactured by the Company Research Laboratory (FARL). The HDD were based on a design also made for the Airborne Radar Systems Division at Borehamwood. They were intended to support trials programmes as and when the opportunity arose and especially to be compatible with high resolution EO Sensors.

The HDD use a Cathode Ray Tube with a monochrome green phosphor and offer high contrast symbology visible in 10,000ft lamberts ambient light. They will accept 625-line video although two units were modified for 875-line. The twenty function keyboard has ten keys adjacent to the screen so that they can be labelled by on-screen legends. The keyboard interface was a serial data bus to a Panavia specification.

Two of the units were used by ADD for sales demonstrations notably at the Paris Air Show and one was incorporated into a cockpit simulator to study Direct Voice Input. The 875-line units were evaluated by RAE in Puma and Westland Helicopters. This unit has Serial Number 006 and appears in the Company literature around 1978. This unit was found in the old Thorn Building.

Click to enlarge Click to enlarge Click to enlarge