Delay Unit providing an adjustable delay of 1-200 seconds
from instant of switch on. Standard 50V output to operate
DD Spec 7.106. DDTM 7.107. OBSOLESCENT.
Input Logic Delay Unit which accepts a signal from anyone
of a number of UN20/5 and after a variable delay of up to
20 minutes generates a chain of trigger pulses to feed
DD Spec 2.265.
Adjustable Delay Unit for delaying the operation of a
push-button selected 50V relay until the previous
selection has released. Is connected in series with the
common feed to the push buttons. Printed board occupying
the space of 4 relays on CHl/44. DD 1968. WITHDRAWN.
Adjustable Delay Unit for delaying the operation of a push
button selected 50V relay until a previous selection has
released. Printed circuit board, occupying the space of 4
relays on CHl/44. SCPD 1969. OBSOLESCENT.
Delay Unit used in RP4/4 to display a flashing lamp after,
say 25 seconds has elapsed from the start of reproduction
of an "effect". Printed circuit board. DD 1968.
DD Spec 1.61. OBSOLESCENT.
Delay Unit used in UNl/99 for alarm and
switching on fault detection in automatic
and resetting 15 minutes after the last incident
detection. Printed board. DD 1968. ACO.
Telephone Throwback Delay Unit used in PA8/308 in
conjunction with UN20/l8 to carry out EMX throwback
switching after an interval of 30 seconds following
receipt of 17Hz ringing. Also controls switching of cue
programme fed through AM4/8. First used Broadcasting
House London Continuity Suites. Printed circuit board.
DD 1969. DD Spec 3.483. ACO. OBSOLESCENT.
Delay Unit, used with AM6/ll.
DDMI 3.547. OBSOLESCENT.
Delay Unit used to provide the complex conjugate of a
given vector and to delay this by one line duration used
in the Bruch Corrector. CHl/12A. DD 1966. WITHDRAWN.
Delay Unit used in EP5M/506 etc., to delay, amplify and
invert standard burst gate pulses for use by a burst
locked oscillator. Includes PS2/22B. CHl/l2A, pegs 9,
31. DD 1966. DD Spec 10.19. ACO. OBSOLESCENT.
Delay Unit, 63.85~s giving a full video bandwidth delay of
one television line. Handles a IV 75~ signal at input and
output. CH1/l2A, pegs 15, 31. DD 1967. DD Spec 7.129.
DDTM 7.141. OBSOLESCENT.