PAlBM/S14A
PA18M/5l5
PAlBM/5l6
PAlBM/5l7
PA18M/S18
PAlSM/S18A
PA18M/5l8B
PAlBL/S19
PA18M/ S20
PA18M/S2l
PA18M/S22
293 -
PA18
ACO. OBSOLESCENT.
As PA18M/S14 with addition of GE2/Sll and PS2/l3F to
provide switch trigger pulse output for use in EPS/503B.
1970. OBSOLESCENT.
Split Screen Video Switch Unit based on PAlB/S07 to give 3
video outputs and includes GE2/554 to provide split screen
signal output with the first four lines after blanking
being from one source and the remainder from the other
source. PN3/23 with sub-units. 1967. OBSOLETE.
Video Switch Panel used in EP5/S07.
but contains 2 GE2/Sll instead
DD Spec 8.282. OBSOLESCENT.
Similar to PA18M/S13
of 2 AM4/Sll. 1967.
Split Screen Video Switch Panel used with GE2M/573. May
be used in place of PA18/S07 to provide extra facilities.
PN3/23 with PS2/S05, AM4/Sl7, GE2/567, GE2/50SA, GE2/520,
UN9/52l, 2 AM5/5l5, 2 NE4/5l0. DD 1968. DD Spec 8.373.
OBSOLESCENT.
Split Screen Switch Panel for inlay and overlay effects.
PN3/23 with GE2/S05A, GE2/S20, GE2/S26A, PS2/2lB, PS2/50S,
UN9/S2l,
AM4/5l7.
1968.
DD Spec 8.321.
EDI 1003S(1)MAR72. ACO. OBSOLETE.
Similar
GE2/S26A.
to PAlBM/5l8 but with
1969. WITHDRAWN.
GE2/526B
instead
of
Modified PA18M/Sl8 for
overlay or infill unit.
WITHDRAWN.
use as black edgers and as an
Superseded by PA18M/522. 1970.
Video 2 x 1 Switch Panel for bypassing regional continuity
mixers, when not in use, through a side chain. Switching
takes place in the field sync period and is controlled by
tranSistor
logic
from
the
mixer
controls.
Includes
EQS/S23, GE6/Sl2, UN9/S69, PS2/88, AT3/5llA. DD 1968.
DD Spec B.363. OBSOLESCENT.
Split Screen Switch Panel used in conjunction with GE2/S89
to blank "BBC 2 Colour" and substitute "BBC 1 Colour".
Modified PA18/507 similar to PA18M/SlS. 1969.
OBSOLESCENT.
Split Screen Switch Panel used to provide titling for
BBC-I Test Card F at transmitting stations. PN3/23 with
sub-units. 1969. WITHDRAWN.
Split Screen Switch Panel based on BA18/S07 with
facilities for black edge captions and colour separation
overlay. Has 3 video inputs, A, B, C, the latter being
switchable to either the A or B routes. Also has external
infill facilities for routing to A or B during overlay or
caption
operation.
PN3/23
with GE2/520, GE2/S05A,
GE2/526A, UN9/521, AM4/517, PS2/l3F, PS2/S0S, NE1/S16A.
DD 1969. DD Spec 8.379. DDTM 8.317. EDI 10035(1)MAR72.

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