UN23
UN23/24
UN23/57
UN23/76
UN23/50l
UN23/502
UN23/503
UN23/504
UN23/505
UN23/506
UN23/S07
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OBSOLESCENT.
Data Input Interface Logic Unit, used in PCM Coder BAl/4
to link 12 volt input logic pulses to Data Encoder UN23/l7
and to derive "change of state" pulse. Printed circuit
board with 64 way connector for special Imhof l33mm CDX
panel. DD 1972. OBSOLESCENT.
Address Logic Unit to address MIC store 4U double sided
unsupported board with PNl/29J panel. Superseded by
SCl/7. DD 1976. OBSOLESCENT.
Camera Talk Back Selection Unit. Provides selective talk
back logic for 9 cameras from 5 engineering stations.
Power requirements ~7.SV, +24V, 2S0mA. 3U high x l78mm
deep ISEP. PCB with UECL connector. No front panel.
SCPD 1977. CANCELLED 1978.
Frame Counter Logic Unit used in EP6/502 to count frame
pulses from the telecine machine and issue 'inch' and
'stop' commands to UN23/502, UN23/506. Printed board
254mm x 152mm with 51mm x 178mm panel. SCPD 1967.
OBSOLESCENT.
Machine Control Logic Unit used in EP6/502 to process the
control signals from UN23/S01, UN23/504 and operate the
Forward, Reverse or Inch relays. Printed board 254mm x
152mm with 51mm x 178mm panel. SCPD 1967. OBSOLESCENT.
Cue Dot Counter Logic Unit used in EP6/502 to count film
cue dots from UN23/50l irrespective of the number and
direction of traverses of the film that have occurred, and
give an indication of the film sequence in use to
UN23/504, UN23/S07. Printed circuit board 254mm x lS2mm
with 5lmm x 178mm panel. SCPD 1967. DD Spec 11.100(70).
OBSOLESCENT.
Comparator Logic Unit used in EP6/502 to compare the
present film sequence number from U UN23/503 with the
commanded film sequency number from UN23/505 and issue the
appropriate forward or reverse command to UN23/502.
Printed circuit board 254mm x l52mm with 51 lm x l78mm
panel. SCPD 1967. OBS LESCENT.
Studio Register Logic Unit used in EP6/502 to store the
commands from a remote point and route them to UN23/504.
Printed circuit board 2S4mm x l52mm with 5lmm x 178mm
panel. SCPD 1967. OBSOLESCENT.
Stop Control Logic Unit used in EP6/502 to process the
stop commands from UN23/50l, UN23/507 and the end film
dot, and issue the stop command to the appropriate relay.
Also receives the executive signal from UN23/507 and
issues a delayed 'Not Executive' signal to UN23/505.
Printed circuit board 254mm x 152mm with 5lmm x l78mm
panel. SCPD 1967. OBSOLESCENT.
Command Processor Logic Unit used in EP6/502 to receive

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