3.1.2.2 Input Keys
The Input keys are used for selecting an input during a
switch operation.
3.1.2.3 Output Keys
The Output keys are used for selecting an output during a
switch operation.
3.2 Rear of an Enclosure
The rear of an enclosure is where all the physical connections
are made. The rear of an enclosure contains the audio and
video I/O connectors, power switch, CPU, sync connector, and
zero to two DB-9 ports. The input and output connectors are
attached to I/O boards within the enclosure.
3.2.1 I/O Boards and Connectors
An enclosure can contain two I/O boards which can be any
combination of audio and/or video boards. The number and
type of connectors on the boards depends on the matrix
configuration. Looking at the rear of the enclosure, the inputs
are to the left and the outputs are to the right. The
connectors mirror the keys on the front panel.
3.2.2 DB-9 Port
The half-Y can be ordered with zero to two DB-9 ports or
other type of external controller interface. Use the DB-9 ports
for controlling the matrix with an external controlling device
that uses RS-232 or RS-422.
3.2.3 Vertical Interval Sync Connector
The sync connector is a BNC connector located to the right of
the power switch. The sync processor allows switching to
occur during the vertical interval.
3-3
The Enclosure and Its Parts
figure 3.4 12x4 enclosure, rear view
Power Connector
Power Switch
Sync Connector
DB-9 Port
Input Connectors
Output Connectors
