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DD 1964. ACO. WITHDRAWN.
Field Trigger Delay Pulse Generator. Provides pseudo
field trigger pulses delayed by 50~s to 250~s on network
pulses to give beam blanking in a vidicon camera to
eliminate output produced by adjacent illuminated
DD Spec 7.45.
DDTM 7.84. OBSOLESCENT.
Blanking Pulse Generator used in UN4/50l. CH1/12, pegs
11, 30. DD 1965. DD Spec 8.212. ACO. OBSOLESCENT.
Version of GE2/525 modified for colour separation overlay
as detailed in DDTM 8.298. DD 1971. OBSOLESCENT.
Caption Pulse Generator
DD 1964. DD Spec 8.207.
in UN4/502B, UN4/502C.
Used to produce, from a video input, a suitable switching
waveform to drive GE2/520 in the production of caption and
Used in PA18M/5l8. DD 1968. WITHDRAWN.
Similar to GE2/526A but for use in PA18M/5l8A to provide
colour separation overlay only. DD 1969. WITHDRAWN.
Caption Pulse Generator for use with colour separation
overlay, with soft keying facility. CH1/12A, indexing as
for GE2/526. Used in PA18M/52ZA. DD 1972. DDTM 8.317.
Colour Pulse and Bar Generator used with TE1/503 to
measure response of circuit designed to handle 625 line
colour signals with a subcarrier frequency of 4.43MHz.
CHl/33 with PS2/l3F, OS2/506, GE2/528, GE2/529. Fits in
CS2jll for portable use. Superseded by GE4M/56l.
DD 1967. DD Spec 9.50. OBSOLESCENT.
Loose version of GE2/527 comprising sub-units and back
panel for mounting in PN3/23. DD 1967. DD Spec 9.50.
Pulse and Bar Luminance Generator used in GE2/527 to
provide the luminance components of the two output
waveforms and produce a modulated 4.43MHz subcarrier
waveform in conjunction with OS2/506. CH1/12A, pegs 12,
27. DD 1964. DD Spec 9.52. OBSOLESCENT.
Pulse Timing Generator used in GE2/527 to trigger GE2/528
by providing four pulses delayed with respect to the front
edge of line sync pulses. CHl/lZA, pegs 12, 21. DD 1964.
DD Spec 9.51. OBSOLESCENT.
Pre-field Pulse Generator used in UNl/556 to provide, for
blanking purposes, a positive going field frequency output
from a feed of negative going field frequency pulses.
Printed board. DD 1964. ACO. WITHDRAWN.