UN4/3
UN4/501
UN4/501A
UN4/502
UN4/502A
UN4/502B
UN4/502C
UN4/502D
UN4/503
UN4/S04
375 -
UN4
psuedo-stereophonic
monophonic input.
EOI 10120(1)NOV71.
derived from a single
DD 1971. DD Spec 3.539.
output
CH1/18C.
OBSOLESCENT .
Telephone Effects Unit, used to provide acoustic ringing
effects in studios. Imhof cabinet type 250A with modified
P.O. telephone No.706. TSR. DD 1972. OBSOLESCENT.
Split Screen Effects Unit used in association with
AM18/503 in OB Mixers MX1/501. Gives split output picture
signal from two sources. Remotely controlled. Includes
GE1/S06, GE1/507, GE2/505, GE2/506, GE2/507, GE2/525,
UN9/514A, PS2/S03A mounted in CH1/13E. DD 1962.
DD Spec 8.86. DDHB 8.120. ACO. OBSOLESCENT.
Version of UN4/S01 modified for colour separation overlay
as detailed in DDTM 8.298. DD 1971. OBSOLESCENT.
Split Screen Effects Unit. Part of a television studio
mixer. Accepts two video inputs and gives output for a
picture split into two parts each showing part of one of
the two input pictures. Generates twelve basic patterns.
Remotely controlled. Unity gain giving main and
monitoring outputs each 1V into 75~. Includes two PN3/21
bolted together for pan chassis mounting with GE1/S06,
GE1/507A, GE1/511, GE2/S05, GE2/S06, GE2/507A, GE2/S09,
GE2/S15, GE2/S16, PS2/503A, UN9/514. DD 1962. ACO.
OBSOLESCENT.
As UN4/502 but with
DD 1963. DD Spec 8.99.
two PN3/23
DDHB 8.144.
for flush mounting.
OBSOLESCENT.
Electrically as UN4/S02C but mounted
DD 1965. DD Spec 8.317. WITHDRAWN.
in 2 PN3/21.
Modified UN4/502A to provide Caption Effects and Negative
Picture facilities. Two PN3/23 with GE1/506, GE1/507A,
GE1/S11, GE1/S16, PS2/503A, UN9/S14A. DD 1965.
DD Spec 8.317. OBSOLESCENT.
to UN4/S02C but with additional units
NE1/S21 and less NE1/510, NEl/Sll, tJ
change over and revised CSO logic.
UN9/Sl0,
provide
DD 1970.
Similar
AMl/S5l,
fade/wipe
WITHDRAWN .
Caption Effects Unit. Accepts video signal from a caption
scanner and provides two correctly blanked output signals,
one positive going and the other negative going. Used in
conjunction with 3 MX1/S06. Mains operated and supplies
power to associated MX1/506s. Used in EP1/506. CH1/12A,
pegs 25, 30. DD 1965. DD Spec 8.210. ACO. OBSOLESCENT.
Synthesiser Effects Unit used in PAlM/SS8. Developed from
UN4/503 and incorporates "soft edge" clippings and a mains
transformer with
larger
rating.
The
state
of its two
pulse outputs depends on the instantaneous amplitude of
the monochrome picture signal input about a preset level.
CH1/12A,
pegs
71,
76.
DD 1969.
DD Spec 8.381.

75