- 80 -
DD Spec 10.14. DDHB 10.12. ACO. OBSOLEWCENT.
Digital Phase Shift Frequency Converter used to convert
the frequency of the signal from C02/52l to the original
sub-carrier frequency with digital control of the output
UN9/528. CHl/28, oegs 7, 26. DD 1966. DD Spec 10.15.
DDHB 10.12. ACO. OBSOLESCENT.
Natlock/PAL Colour Sub-carrier Frequency Converter.
Provides a single feed of PAL colour sub-carrier from an
input of Natlock reference oscillator frequency. Includes
C02/524, OS2/5l3, C02/527 with mounting panel for fitting
DD Spec 10.13.
Natlock Oscillator Frequency Converter used in C02L/523 to
provide an output at a sub multiple of the input frequency
for use in controlling OS2/5l3. CHl/26A, pegs 3, 41.
DD 1966. DD Spec 10.65. ACO. OBSOLESCENT.
As C02/524 but without 75~ load on Natlock input.
DD 1971. OBSOLESCENT.
centred on 30Mc/s to
used to convert
drive quartz delay
CH1/12A. DD 1966.
Amp ex frequency
to new signals
Frequency Converter used to convert frequency modulated
signals centred on 30Mc/s down to 5/5Mc/s-6.8Mc/s, using
an external oscillator which is usually the one in
C02/525. CH1/12A. DD 1966. WITHDRAWN.
PAL Colour Sub-carrier Frequency Converter employing
UN9/528 Binary Switch Units to divide the frequency of the
output signal from C02/524 by a factor of 75, and compare
in phase with the difference signal from the Natlock
reference frequency and the PAL colour sub-carrier signal
to provide a phase comparator output for locking OS2/5l3.
CH1/26A, pegs 5, 43. DD 1966. ACO. OBSOLESCENT.
As C02/527, but designed to operate at Natlock frequency,
and fitted with additional inverter stage in phase
DD Spec 10.65.
Sound Frequency Converter similar to C02/519 but contains
frequency multiplier and has Band III output. Printed
circuit board, 89mm x 152mm. DD 1967. OBSOLESCENT.
Vision Frequency Converter similar to C02/520 but contains
frequency multiplier and had Band III output. Printed
circuit board 89mm x 152mm. DD 1967. OBSOLESCENT.
UHF Pump Frequency Converter used in EP7/5ll. Accepts VHF
input from OS2/519, amplifies and multiplies it in
frequency to UHF. Output is applied via FL2/533 or