GE4/530
GE4M/53l
GE4/533
GE4L/534
GE4/536
GE4/537
GE4/538
GE4/539
GE4M/540
GE4/54l
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GE4
IV or 0.7V into 75n. Internal 24V dry battery with
provision for external power supply. CHl/26A, pegs 5, 34.
DD 1966. DD Spec 9.78. ACO. OBSOLESCENT.
Chrominance Pedestal Test Line Generator used in MNlM/507.
Generates a test line signal of sub-carrier superimposed
on l2~s luminance pedestals of 0.7V and 0.35V separated by
a 24~s of black level, and adds it to a composite
waveform. CHl/12A. DD 1972. WITHDRAWN.
Line Up Test Generator for checking transmission links
from Carlisle. PN3/23 with GE2/540, GE4/5l6, GE4/5l7,
OS2/5l6, PS2/l3F, GEl/534, UN9/547. DD 1967.
OBSOLESCENT.
Staircase and Bar Waveform Generator for replacement of
the sawtooth generator module in GE4/5l4 on a plug-in
replacement basis. CHl/26. DD 1967. WITHDRAWN.
Decoder Line Up Test Generator. Simplified version of
GE4M/524. Includes GE2/553, UN9/545, 2 GE6/505, AMl/554,
PN3A/16D. DD 1967. OBSOLESCENT.
Second Line Insertion Test Signal Generator used in
AM2M/506, GE4M/540. CHl/12A, pegs 21, 23. DD 1968.
DD Spec 9.125. DDHB 9.96. OBSOLESCENT.
Bar Sinister Test Generator used to generate a diagonal
bar to provide horizontal and vertical black to white
transitions for checking high and low speed switches in
C06/50l, C06/50lA. Requires all four 625 line standard
pulses obtainable by use of UN16/507 and GE2/557. Mains
operated. CHl/12A, pegs 21, 33. DD 1968. DD Spec 7.160.
ACO. OBSOLESCENT.
SECAM-PAL Transcoder Test Generator supplying outputs of
SECAM coded colour bar waveforms and RGB colour bars with
suitable timing adjustment for the transcoder under test.
Comprises PA9M/509 mounted above SECAM coder CT40.
DD 1968. DD Spec 11.66. WITHDRAWN.
Drop Out Compensator Test Generator used to check
alignment and operation of EP1L/5l8, EP1L/5l8A. Generates
a drop out signal on alternate lines over part of the
picture. Small box which plugs into back of EP1L/518,
EP1L/5l8A. DD 1968. DD Spec 7.166. OBSOLESCENT.
Insertion Test Line Signal Generator, 625 line, providing
the current ITS for 625 line working. Replaces GE4/518
and AM2M/506. Two PN3/23 with AM4/519, GE2/535B,
GE2/565B, GE4/5l6A, GE4/536, GE4/54l, MN2/515, OSl/513,
OS2/521, PS2/13F, PS2/86, UN1/540B, UN1/580. DD 1969.
DD Spec 9.120,
DDMI 9.170.
DDHB 9.96.
DDTM 9.145.
OBSOLESCENT.
Staircase Waveform Test Generator used to provide
staircase component of the 625 line ITS waveform. Similar
to GE4/5l7 but with additional facilities. CHl/l2A, pegs

71