UN230657 UN23/657
UN230658 UN23/658
UN230659 UN23/659
UN230660 UN23/660
UN230662 UN23/662
UN23/662A
UN230664 UN23/664
UN230665 UN23/665
UN230666 UN23/666
UN230667 UN23/667
buttons or up to four sets of BCD coded thumbwheel switches
together with a momentary interrupt for the first twelve
selections. Latched outputs are provided to indicate the
selection in individual form or to drive seven segment
displays. Power requirements +5V. 4U BMM unsupported card
with PN1/29J front panel. Parent Equipment CD2L/518. DD
1977. DDMI 8.599(79).
Interpolation Control Logic Unit to control the digital
multipliers, UN26/535 in the field store standards
converter to produce temporal and spatial interpolation.
Power
requirements
5V
d.c.
1.5A.
CH1/75A.
Parent
equipment C06/510. DD 1978.
Main Computer Interface. Microprocessor interface board
for connecting Ceefax magazine source computer into the
Ceefax microprocessor based CVI. This initial version for
CAI computers. A second version may be produced to suite a
DEC PDP-II computer. Power requirements +5V. PN1/29J. RD
1978.
Subtitle Interface. Microprocessor interface board for
connecting input from subtitle computer into the Ceefax
microprocessor based CVI. Power requirements +5V.
PN1/29J. RD 1978.
Output Timing Logic obtains data by direct memory access to
microprocessor memory, serialises data and outputs it
during field internal data lines. Function set by fusible
link read only memories to operate according to Ceefax
specification. Power requirements +5V. PN1/29J. RD 1978.
Decision Logic Unit. The unit accepts information
regarding the sync level, chrominance level and noise of
two video signals and generates a decision command to video
matrix SE3/504. Power requirements +12V, -12V. CH1/64A.
Parent equipment SE1M/501. DD 1978.
Decision Logic Unit. As UN23/662 but with revised panel
indication.
Same
code
pins
as
UN23/662.
Power
requirements +12V, -12V. DD 1980.
Printer Control Logic. It is driven from a teletext
decoder via a pulse processing unit UN2/545. It contains
the operation of a matrix printer to provide hard copy of a
teletext page. Power requirements +12V +5V -5V.
305mm x 127mm printed circuit board. DD 1978.
Interface Logic Unit. Interface and latch board for
MA2M/505 incorporating inter-field cut. BMM 4U unsupported
printed circuit board. SCPD 1979.
Logic Unit. Part of SE3L/505, This unit contains
for control panel switches and waveform selection
4U 'J' size printed circuit board with panel.
equipment SE3L/505. DD 1979. DDMI 8.622(80).
latches
matrix.
Parent
Address Control Card. The unit processes read and
address signals in the C06/510 field stores.
write
Power
326

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