GE4
GE4/508
GE4/508A
GE4/508B
GE4/508C
GE4/508D
GE4/509
GE4/5l0
GE4/5ll
GE4/512
GE4/5l3
GE4/5l3A
GE4/514
GE4/5l5
- 168 -
milli-microsecond at repetition rates of 50c/s and 350c/s.
Mains operated.
Portable in case
CS2/7.
Weight:
20lb.
NEl/506 provides resistive terminating network. Valves:
85A2, l2BH7, l2AU7, EL822. DD 1960. DD Spec 9.17.
DDHB 9.16. OBSOLESCENT.
Picture Line Up Generator. Provides composite test signal
for use in one man control areas for setting up picture
monitors.
Mains
operated.
CHl/12D.
DD 1960.
DD Spec 8.54. DDHB 8.110. ACO. OBSOLESCENT.
Modified GE4/508 for use on 525 and 625 lines. DD 1962.
OBSOLESCENT.
Modified GE4/508A to give
instead of 2 step. DD 1969.
4 step vertical grey scale
DD Spec 8.54. OBSOLESCENT.
DD 1972. OBSOLESCENT.
DD 1972. OBSOLESCENT.
Pre-set Law Test Step Generator. Provides video test
signal of 10 steps with sync pulses. Law of steps can be
altered by changing plug-in wiring board. Mains operated.
CHl/12B.
DD 1961.
DD Spec 8.56.
DDHB 8.115.
ACO.
OBSOLESCENT.
DD 1961. CANCELLED.
Field Interval Test Signal Generator used in conjunction
with PAl/506 to provide standard field interval test
signal. CH3/lF. DD 1961. DD Spec 9.30. OBSOLESCENT.
Colour Bar Generator. Provides the three video signals to
align
coders
and
monitors.
CHl/12C.
Mains
operated.
DD 1962. DD Spec 8.57. DDTM 8.116. OBSOLESCENT.
Provides grid pattern of white bars on
for linearity checking of picture
convergence adjustment of colour
or
625
line
standards.
Mains
DD 1962. DD Spec 8.77. DDHB 8.119.
Grille Generator.
a black background
monitors etc., and
monitors. 405, 525
operated. CHl/12C.
ACO. OBSOLESCENT.
As GE4/5l3 but
grille. DD 1971.
with modification to 625 line
DD Spec 8.77. OBSOLESCENT.
linearity
Colour Sub carrier Generator and Adder used to provide a
sawtooth waveform with line syncs. PN3/23 with 6 CHl/12A
modules (Subcarrier Generator, Sawtooth and Line Sync
Generator, Gating Pulse Generator, Modulator, Output
Amplifier,
Power
Supply).
CS2/ll.
DD 1962.
DD Spec 9.55. DDTM 9.62, 9.71, 9.76. OBSOLESCENT.
Focus Rock Generator used in EP6/50l. Generates a 25c/s
square waveform to modulate the focus current in the
vidicon camera for beam alignment. Output is applied via
a relay to PS2/23. Mains operated by internal PS2/22B.

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