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UN3
coding 3, 9, 21. DD 1970. DD Spec 7.209. OBSOLESCENT.
UN3/528
Modem Control Unit used in EPlM/522 to convert signal
levels from Modem to standard logic levels. CH1/12A.
DD 1970. ACO. OBSOLESCENT.
UN3/529
Modem Interface Control Unit used in EPlM/522 to control
the operation of a PO Modem lA ModelS in conjunction with
UN3/528. DD 1970. OBSOLESCENT.
UN3/530
Joystick Control Unit used in pairs in conjunction with
UN1/627 for controlling gamma and gain in EP1/503. Box
114mm
x
105mm
x
95mm.
DD 1970.
DD Spec 8.399.
EDI 10068(1)OCT70. OBSOLESCENT.
UN3/531
Data Control Unit used in EPlM/521. Together with two
CD3/508 it replaces CD3/509. 33 way ISEP board, coding 3,
9, 17. DD 1970. DD Spec 7.242. OBSOLESCENT.
UN3/532
Te1ecine Picture Phasing Control Unit
the original UN17/52l which has been
Powered by UN20/536. CH1/12A, pegs
WITHDRAWN.
replacing part of
re-coded UN20/536.
45, 78. DD 1970.
UN3/533
Sound Fader Control Unit for controlling AMl/586 in
EP5/509. CHl/43B. DD 1970. OBSOLESCENT.
UN3/534
Caption Effects Control Unit used in EPlM/52l to control
special caption presentation effects. 33 way ISEP board,
coding 3, 11, 31. DD 1970. OBSOLESCENT.
UN3/536
Digital Clock Control Unit used in GElM/566 to provide
control waveform for UNl/644, UNl/655. Printed circuit
board with 33 way ISEP plug, coding 15, 19, 21. DD 1971.
DD Spec 7.197(71), 7.250. OBSOLESCENT.
UN3/537
Vertical Shift Control Unit used in EP1M/52l to shift the
data in the store up one row, 33 way ISEP board. DD 1971.
OBSOLESCENT.
UN3/539
Control
EP5/509.
Unit used with AMl/589 to replace PN3/520
33 way ISEP board. DD 1971. OBSOLESCENT.
in
UN3/540
Bias Control Unit providing 4 constant current sources for
the UHF power amplifiers in EP7/5l3. CHl/12A, coding 49,
54. DD 1971. DD Spec 5.214. OBSOLESCENT.
UN3/54l
UHF AGC Unit for providing AGC on single mixer translators
and active deflectors. Comprises feedback controlled UHF
attenuators with detector and amplifier. CHI/57.
DD 1971. DD Spec 5.212. DDMI 5.227(72). OBSOLESCENT.
UN3/542
Sequence Control Unit, used in MN2L/521 to control the
switching of video signals to the input of a Sync Gauge
MN2L/521 and to response to signals from the gauge,
varying the switching rate between sources accordingly.
CH1/43 with coding pegs 1, 4, 11. DD 1971.
DD Spec 11.142. OBSOLESCENT.

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