4u unsupported printed board.
Graphics Processing Unit. This unit accepts up to two bits
of TTL 625 line synchronous data and will deliver either
RGB composite or non-composite signals into 75Q. The level
of RG and B being adjustable via an on-card pin matrix.
Alternatively the two bits of data may be considered as a
key and infill for insertion of monochrome graphics into
the video input signal supplied to the unit. Power
requirements :t12V at 400mA +5V at 800mA approx. 4u BMM
unsupported card. Parent equipment GE6M/548. DD 1981.
Graphics Processing Unit. This unit is electrically and
mechanically identical to the UN26/557 with the exception
that the pin matrix is not fitted, and the 'Colour Matching
Unit' UN26/564 has been fitted in its place. Power
requirements +5V and :t12V d.c. Standard 4U BMM unsupported
card. Parent equipment GE6M/548A. DD 1982.
Digital Processing and Addressing Unit. Provides
addressing and control logic used in GE6M/555 and includes
control circuitry to interface with UN26/31, GE6/544 and
GE6/545 used in GE6M/555. Power requirements 5.25v at lA.
CH1/79. 4U Wire wrap. Parent equipment GE6M/ 555. DD
Video Input Processing Unit. This card processes IV input
composite sequential video and provides:
1. Mixed Syncs (MS)
2. Line Trigger (LT)
3. Burst Gate
4. VAS PAL square wave (7.8kHz)
5. Field Trigger (FT)
equipment EP5L/516. DD 1981.
Sync Monitor Processing Unit. De-serialises sequential
data and provides following 'active-low' outputs for each
1. Video present.
2. Video present + timed (line and field)
3. Video present + timed (line and field) + colour.
Outputs also provided indicating:
1. Single - step mode.
2. Loss of reference signals.
Power requirements :t6V, approx 150mA. 4u unsupported pcb.
Parent equipment EP5L/516. DD 1981.
Display Controller and Digital Processing Unit. Provides
addressing and control logic used in GE6M/557. Includes
control circuitry to interface with UN26/3l, GE6/544,
GE6/545, GE6/556 in GE6M/557. Power requirements 5.25V at
1. 5V. CH1/79, 4U Wire-Wrap. Parent equipment GE6M/557.
Fringe Suppressor Unit. Uses the exclusive key obtained
from the Exclusive Key and Parade Unit UN26/547 to suppress