UN9/530A
UN9/53l
UN9/532
UN9/533
UN9/534
UN9/535
UN9/536
UN9/537
UN9/538
UN9/539
UN9/540
UN9/54l
UN9/542
383 -
UN9
Standby Switch Unit identical with UN9/530 except that
relay is slugged to give preference to the main
translator. Contained in PSlM/13 feeding the standby
translator. DD 1965. DD Spec 12.3. OBSOLESCENT.
Manual Switch Unit used on BA13/504 and BAl3/505 in place
of UN9/530 and UN9/530A to override automatic changeover
circuitry.
CH1/12A.
DD 1965.
DD Spec 12.3.
OBSOLESCENT.
Standards Change Unit used in EPl/504 to sense the
presence of a 10kHz television line repetition frequency
and switch to the appropriate delayed video signals for
the line standard in use. CH1/12A, pegs 17, 28. DD 1965.
DD Spec 7.87. DDHB 7.118. ACO. OBSOLESCENT.
Automatic Changeover Switch Unit used on BA13/506,
BA13/507, BAl3/508. Similar to UN9/530, UN9/530A, UN9/53l
but contains relay power supply. CH1/12A. DD 1965.
DD Spec 12.3. OBSOLESCENT.
Gating Switch Unit used in MN2M/506 to switch components
of test line signal from composite video waveform to
relevant detectors. CH1/l2A, pegs 19, 24. DD 1965. ACO.
OBSOLESCENT.
Bypass Switch Unit used in EPl/504 to bypass the corrector
in the event of a fault condition. Relay operated.
CH1/l2A, pegs 15, 25. DD 1965. DD Spec 7.114. ACO.
OBSOLESCENT.
Two-pole Video Changeover Switch operated by
signal. General use in laboratories etc.
DD 1966. WITHDRAWN.
a 6V d.c.
CH1/12A.
Test Signal Switch Unit used in GE4M/52l to select one of
two different test signals. CHl/12A. DD 1966.
WITHDRAWN.
Chrominance Switch Unit
luminance signal to
CH1/l2A, pegs 4,
OBSOLESCENT.
used
the
36.
in GE1M/529 to switch the
required decodinp system.
DD 1966. DD )ec 8.224.
Luminance Switch
luminance signal
CH1/l2A, pegs
OBSOLESCENT.
Unit
to
4,
used in GE1M/529 to switch the
the required decoding system.
37.
DD 1966.
DD Spec 8.222.
Send Level Switch Unit used with AMS/5l3 in EP8/501A for
sending levels of OdB, +4dB, +8dB, +12dB. CHl/12A.
DD 1966. DD Spec 6.143. OBSOLESCENT.
Video Switch Unit, 75~, including UN9/536 and switching
amplifier and power supplier of PS2/22 type but for l15V
a.c. CHl/12A. DD 1966. WITHDRAWN.
PAL Vector Switch Unit used with DMl/502 and UNl/540.

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