C02
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OBSOLESCENT.
C02/546
Frequency
Converter used in EP14M/s04
with
a variable
oscillator to convert an input from the transmitter under
test to a 37.5MHz output for amplification by AM21/503.
The input from the transmitter can be modulated by an
external video generator. CH1/12A. DD 1970. WITHDRAWN.
C02/547
Frequency Converter used in Video Digital Equipment to
obtain clock frequency three times
that of an input of PAL
colour
subcarrier
frequency.
CH1/12A,
pegs
47,
81.
DD 1970. WITHDRAWN.
C03 PHOTOELECTRIC CONVERTERS
C03/501
3-co1our Photo-electric Converter
associated with UN16/s22
and
mounted
on
BA10/501.
Gives
3
independent
video
signals of 1V approximately for an input of 20
mi11i1umens.
Box
260mm x 300mm x 200mm which fits to the
associated optical splitting device.
DD 1970. WITHDRAWN.
C03/502
Photo-electric Converter which utilises a sOmm diameter 10
stage photomu1tip1ier (EMI type
9656)
and associated
potential divider, together with emitter follower output
stage, and fits
by
bayonet action onto bushes on UN16/s22.
70mm overall diameter, 160mm long. DD 1970.
OBSOLESCENT.
C03 Sub Group not available
for new designs DD 1977.
=========================================================================
C04 DIGITAL CODE CONVERTERS
(Sub
Group previously defined as "Pulse Converters"
DD 1977).
C04/1
C04/502
DD 1972. WITHDRAWN.
Syne Pulse Converter used
in AM18/504
to provide driving
pulses for
AM18/S06.
Input: 1V p-p of sync pulses or
composite video signal. Outputs: 2.sV p-p positive pulses
and 2.5V p-p
negative pulses coincident with input syncs.
CH1/12A. DD 1961. DD Spec 6.99. ACO. OBSOLESCENT.
C04/503
Synchronising Pulse Converter. Part of C06/s01. Produces
405
line standard sync and blanking waveforms from
625
line standard waveform. Comprises
2 PN3/23
with eleven
CH1/12A units, PS2/s03A,
AM4/506A.
Six of the units
contain modulator sub-units
UN1/s34
and/or
UN1/s35.
DD 1963. DD Spec 10.1 DDHB 10.4. ACO. OBSOLESCENT.
C04/504
Synchronising Pulse Converter used in C06/s03 to lock the
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