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4408
2.2
Crosspoint control
Connecting button panels
Crosspoints may be selected by connecting a button panel (eg. Pro-Bel's 8 button
6200 or 16 button 6202) to the control socket on the rear panel and setting PL3 to
'BUTTON'.
The analogue audio switcher card has priority switching built in. If two keys are
pressed simultaneously, the higher numbered one will be selected. This feature
allows signal 'line up' to be performed quickly. To achieve this, one key must be
held down and a higher numbered key pushed and released. Each time the higher
numbered key is pushed and released that source will be selected, as long as the
button is held down. Once the button is released, the previous source is selected
again.
Two 8x1 modules may be independently controlled from a 16 button panel, such as
the Pro-Bel 6202. This particular panel has two separate connectors to plug into the
control socket on each module, simplifying the installation. If the internal
expansion cables are fitted (see Source expansion), priority switching can be
performed across several modules. The highest priority module will always be the
left most, viewed from the front of the cards.
OV
Using binary control
To use binary control instead of a button panel, PL3 must be set to 'BIN'. Crosspoints
may be then selected by binary addressing using 12V CMOS levels.
Technical Manual
SEL 1
SEL 2
SEL 3
SEL 4
SEL 5
Example 8 way button panel wiring
Digital Audio 8x1 Switch
LAMPSUP
SEL 6
SEL 7
SEL 8
GND
7
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