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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 WITHDRAWN.
Frequency Converter used in Video Digital Equipment to
obtain clock frequency three times that of an input of PAL
DD 1970. WITHDRAWN.
C03 PHOTOELECTRIC CONVERTERS
3-co1our Photo-electric Converter associated with UN16/s22
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 WITHDRAWN.
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).
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 WITHDRAWN.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.
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.
Synchronising Pulse Converter used in C06/s03 to lock the