ENGLISH
17
BLANKING
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Blanking the picture signal
With pure sound transmissions (e.g. in hotel systems), the picture signal can be
blanked (dark picture).
1
Remove the cover from the bottom of the cassette.
2
Resolder the two chip bridges
A
(for channel
LINE A
) and
B
(for channel
LINE B
) on the solder side of the cassette (see Figure below).
3
Refit and fix the cover to the bottom of the cassette.
4
Refit, fix and connect the cassette.
5
Tune to an analog satellite programme and feed in an external sound signal
via the 15 pin Sub-D socket.
Pin assignment of the Sub-D socket
01 = Audio input, left
02 = CCVS input, unregulated
03 = Switching voltage input, 12 V-
04 = Baseband output (unclamped, linear)
05 = CCVS output (clamped, PAL deemphasis)
06 = Audio input, right
07 = --
08 = Ground
09 = Switching voltage output, 12 V-/10 mA
10 = CCVS input, external picture signals are clamped and regulated
11 = Ground
12 = Audio output, left
13 = Audio output, right
14 = --
15 = --
front of socket
Chip bridge B (LINE B)
Chip bridge A (LINE A)
