GE4
GE4M/520AP
GE4M/521
GE4M/521A
GE4/522
GE4/523
GE4/523A
GE4M/524
GE4M/524P
GE4/525
GE4/526
GE4/526A
GE4M/527
GE4/528
GE4/529
- 170 -
place of PS2/13F. DD 1966. DD Spec 9.73. OBSOLESCENT.
As GE4M/520A but in CS2/11A with PS2/48, if required, in
place of PS2/13F. DD 1966. DD Spec 9.73. OBSOLESCENT.
Transmission Line-up Test Generator, 405 lines. Provides
all the test signals for the line-up of distribution
circuits prior to transmission. PN3/23 with six CH1/12A
units. DD 1966. WITHDRAWN.
Transmission Line-up Test Generator, 625 lines. Similar
to GE4M/52l but for 625 lines. DD 1966. WITHDRAWN.
50c/s Square Wave Test
frequency performance of
DD 1966. CANCELLED.
Generator for checking the low
television equipment. CH1/l2A.
Vertical Colour Bar Generator providing
non-composite outputs, each 0.7V d.a.p.
stable reference sources. 525 or 625
operated. CH1/26B, pegs 3, 38. DD 1966.
EDI 10119(1)JAN72. ACO. OBSOLESCENT.
separate RGB
into 75~, as
lines. Mains
DD Spec 8.232.
Modified GE4/523 to produce ITS colour bar as alternative
to
normal
bars.
Used
with
GE2/594.
DD 1966.
DD Spec 8.232. EDI 101l9(1)JAN72. OBSOLESCENT.
Decoder Line Up Generator used for easy alignment of 625
line
PAL
decoders.
Accepts
either
a
monochrome
or,
preferable, a PAL encoded video signal and provides an
output video signal consisting of vertical white, yellow,
red or black colour bars at 100% saturation for
oscilloscope display. PN3/23 with UN1/540, OSl/502,
GE2/553, UN9/545, 2 GE6/505, AM1/554, PS3/34. DD 1966.
DD Spec 8.257. ACO. OBSOLESCENT.
As GE4M/524 mounted in CS2/1l. DD 1967. DD Spec 8.257.
OBSOLESCENT.
Non Linearity Test Signal Generator (Luminance) for 405
and 625 lines. Used in GE4M/520. CH1/38, pegs 4, 40.
DD 1966. DD Spec 9.74. ACO. OBSOLESCENT.
Ch rominance Non Linearity
GE4M/520. CH1/l2A, pegs 4,
ACO. OBSOLESCENT.
Test Signal Generator used in
41. DD 1966. DD Spec 9.72.
As GE4/526 but for NTSC sub-carrier frequency of 3.58MHz
instead of 4.43MHz. DD 1967. WITHDRAWN.
Pulse and Bar Test Generator (625 lines) for portable use.
Mains or battery operated. CS2/13A. DD 1967. WITHDRAWN.
Pulse, Bar and Trigger Generator.
WITHDRAWN .
CH1/l2A.
DD 1966.
Calibrated Signal Test Generator. Provides a stable peak
which composite video signal of lV p-p or a square wave of

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