UNl
UNl/533P
UNl/534
UN1/535
UNl/536
UN1/537
UNl/537A
UN1/539
UNl/540
UNl/540B
UNl/540C
UNl/S4l
354 -
Slave10ck Receiving Unit. Part of dual standard remote
slaving arrangement. Accepts twice line frequency signal
sent by wire from UNl/528P and amplifies and filters it
for driving the waveform generator. Includes AMl/5l7 and
PSl/l in CHl/13B. DD 1963. DD Spec 8.161. DDTM 8.160.
OBSOLETE.
Pulse Forming Unit used
transistor ASZ2l.
DDMI2.429(76). ACO.
on C04/503.
DD 1963.
WITHDRAWN.
Printed board with
DD Spec 10.1.
Binary Switch used in C04/503 etc. Printed
ASZ2l transistors. DD 1963. DD Spec 10.1.
board with 2
WITHDRAWN .
Emitter Follower used in AT3/502 and AT3/S02A to provide
accurate 7Sn input impedance. Transistors: 3 2N706.
DD 1963. WITHDRAWN.
Sub-carrier Phase Shifter inserted in sub-carrier
distribution systems feeding colour encoders to give
constant reference phase from individual coders arriving
at a mixer, irrespective of path length. Mains operated.
4.43MHz sub-carrier. CHl/12B, pegs 4, 29. DD 1963.
DD Spec 8.196. DDHB 8.182. ACO. OBSOLESCENT.
As UNl/537 but for 3.S8MHz sub-carrier only.
DD Spec 8.196. WITHDRAWN.
DD 1968.
Scan Protection Units 1 and 2 used in C06/S02. Two
CHl/12A. Unit 1 contains line and frame scan sensing
circuits, relays, combiner and output stages. Unit 2
houses 2.5V power supplier (basically PS2/22D) and frame
scan filter. Used with GE3/50l, GE2/5l7, AMl/5lB,
AMl/523, AMl/S24 , AMl/525, AM1/526. Unit 1 pegs 2B, 29.
Unit 2 pegs 9, 13. DD 1963. DD Spec 7.101. DDHB 11.13.
OBSOLESCENT.
Power and Sync Separator used in GE1/522, GE1/522A,
GEl/522B for power supply and as a sync separator output
and blanking pulse generator. CHl/12A. DD 1963.
DD Spec B.178. DDHB 8.187. ACO. OBSOLESCENT.
Improved version of UN1/540 with same coding pegs and
electrical connections. Used in GE2L/5l3 to produce mixed
sync and adjustable burst gating pulse outputs from a
standard level composite video input. Mains operated and
provides power for OSl/513. CHl/12A, pegs 8, 30.
DD 1969. DD Spec 10.45. DDTM 10.22. OBSOLESCENT.
Version of UNl/540 to provide a conventional sync
and blanking waveform when driven by S.I.S.
Otherwise as UNl/540 and a replacement for it
applications. DD 1971. CANCELLED.
output
video.
in some
Colour Signal Analyser used to measure changes in phase of
the subcarrier of an encoded colour signal with reference
to internal phase shifting networks. Output can be
displayed on an oscilloscope. CHl/l2C, pegs 23, 29.

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