GEl/5l0
GEl/511
GEl/5l2
GEl/513
GEl/5l4
GEl/517,5l7P
GEl/5l9
GEl/520
GEl/520A
GEl/521,A,B
GE1/522
- 149
GEl
Black Level Generator for
consists of sync pulses with
Mains operated. DD 1962.
OBSOLESCENT.
colour television signal
the colour burst. CH1/l2A.
DD Spec 8.79. DDTM 8.130.
Sawtooth Generator.
DD Spec 8.126. ACO.
Part of UN4/502.
OBSOLESCENT.
DD 1963.
CH1/12A.
Generator, Line Selector used with an oscilloscope or
waveform monitor for examination of an individual line or
group of lines in a television picture. Includes UN1/35.
CHl/l2A. DD 1963. WITHDRAWN.
Field Scan Generator used with a field scan amplifier
(e.g. AMI/5l8) to provide field scan currents for cathode
ray and camera tube scan coils. Includes correction'S'
for flat-faced tubes, and 'Bow'. Two units 1 and 2 each
in CHl/12A. DD 1963. WITHDRAWN.
Line Sawtooth Generator used with line output amplifiers
to provide line scan current for cathode ray tube or
vidicon camera tube. 625 or 405 lines. Mains operated.
Two CHl/12A, unit 1 pegs 8, 11; unit 2 pegs 8, 15.
DD 1963. DD Spec 7.89. DDHB 7.61. OBSOLESCENT.
Drive Unit for 625 line Waveform Generator. Master
oscillator used with waveform equipment. Provides two
separate outputs of twice line frequency and single output
of oscillator and field frequencies. Comprises double
PN3/23 with OS2/503, UN9/525, C02/508, PS2/24, 2 MDl/50l,
2 C02/506, C02/507, PS2/l3F, 2 PNl/6B. DD 1963.
DDHB 10.3. ACO. WITHDRAWN .
Field Scan Generator producing a 2.4V to 3.6V positive
going field scan sawtooth, stabilised against field rate
changes. Comprises Units 1 and 2 each in CH1/12A.
DD 1964. DD Spec 7.43. DDTM 7.80. ACO. OBSOLESCENT.
Waveform Generator Drive Unit. External master oscillator
from a 625 line
standard
waveform
generator.
Provides
stable source of twice line frequency. Includes PN3/23
with UN17/50l, UN17/502, UN17/503, UN17/504, OS2/505A,
PS2/36. Superseded by GEl/520A. DD 1964. DD Spec 10.2.
DDHB 10.7. ACO. OBSOLESCENT.
As GEl/520, but with OS2/505B and UN17/522 in place of
OS2/505A and UN17/501 and provision for accepting an
additional control signal. For use with Fast Natlock
Genlock. 'B' version superseded by CD2/52l. DD 1971.
DD Spec 10.71(72). OBSOLESCENT.
NTSC Colour Coder.
ancillary signals
GEl/521 for 625
standard 525 line.
OBSOLESCENT.
Accepts R, G and B video signals plus
and produces composite NTSC signal.
line standard I; A = standard G; B =
DD 1964. DD Spec 8.200. DDTM 8.170.
NTSC Decoder, 625 line standard I.
Provides RGB video

49