generator which drive a remote programme point, and the time sharing
comparators which are the controlling elements lor synchronising the
picture sources at the receiving mixer.
The comparator for the Line-dropping rate of Natlock correction is now
fully developed and some ancilliary equipment aimed at simplifying the
operator's
task
will
soon
be
in
prototype
form;
these
are
a
comprehensive control panel for mode selection with supervisory
indications in O.B. vehicles and a BMM test tone generator and analyser
with all required measurement facilities. The existing tone decoder
design has been updated and the performance improved.
To cater for the growing use of genlock with advance timing offset, a
colour genlock unit, to be attached to the new SPG, is under design.
Finally, provision is to be made with a colour superlock generator for
minimum cost regeneration of standard pulses and subcarrier from an
incoming
video.
Though
the
immediate
need
is
for
caption
pulse
generators to be synchronised to remote programme sources, the provision
of drive wave forms at subsidiary programme sources with an assignable
phasing is a convenient technique which this equipment offers in place
of multi-cable pulse distribution.
Modernisation of Disk Reproducers
During the year further consideration was given to means of improving
standards of disk reproduction by modernising operational equipment.
Two main programmes of work have been established as a result. In order
to cater for the very urgent need for more stereo record players in
radio studios, designs which provide replacement electronics have now
been supplemented with a conversion kit which .includes turntable units
Direct-drive turntable kit for modernising disc reproducers
with a very high technical specification. The kit design, for dual disk
reproducers, has been completed and six pairs of turntable units have
been supplied for immediate use. The units incorporate the results of
an operational assessment of the prototype earlier in the year.
The specification for a new design of single turntable reproducer has
been issued following exploratory work to determine the best form of
modular design which would meet the operational needs of Radio,
Television and External Broadcasting. The three operational services
differ in their choice of facilities and the way in which they are used.
Development is under way with priority being given to those units which
are needed for the new Radio Continuity suites next year.
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