AVM RS232 Master Manual
Overview
10
AVM RS232 Master Manual
Overview
1.2 Video Switch Architecture
The drawing below shows the architecture of an 8 X 8 section of a video switch. All crosspoints are switch-
able, but no more than one input can be switched to a given output at a time; i.e. only one closed switch per
column. An input can be sent to any number of outputs; i.e. any number of closed switches per row.
All video inputs are assigned to a video group. All video switching is accomplished by issuing a route video
group message. Even a single wire video input; e.g. composite is assigned to a video group. A video input
cannot be assigned to more than one group. This means that not all crosspoint switches are independently
controllable, since if an input is part of a group it cannot be switched to an output independently of its group.
This drawing (below) shows how 16 X 16 video switch cards can be combined to form larger video
switches. The smallest AVM product has only section #1. Other AVM models add sections #2 and/or #3 to
form larger switches (#3 cannot be added without adding #2). Note that this sparse matrix cannot be filled
in.
A video group (such as an RGB input) can contain signals that span sections, but a single signal
cannot cross sections; e.g. input 2 cannot be routed to output 18 even if section #2 is present.
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