User`s manual

INSTALLATION
33
Before Connecting To Video Devices
Yosemite video routing switchers have a unique video input design. At the rear of frame, each video input
buffer / processing circuit is built in a separate “adapter” See “Video Overview: Input Buffers” for more
information. One end of the “adapter” is a BNC connector. The other end of the adapter is a 15 pin D
miniature connector. When less than the maximum number of inputs are ordered, for example a 64x64
analog video router in a 128x128 frame, some input buffers will not be present. If you ordered the frame
in smaller increments, the Input Numbers labeled on the frame may differ. Please DO NOT MOVE INPUT
BUFFERS WITHOUT CONSULTING SVS CUSTOMER SERVICE.
It is important that only Sierra video input buffer modules be used to connect the 15 pin D connector(s).
Because the analog and digital Yosemite Family video routing switchers use different internal DC
voltages, it is very important that you use ONLY an analog type adapter on analog routers and that you
use ONLY the digital adapter on digital systems.
IMPORTANT NOTE:
When less than the maximum number of inputs are ordered, for example
a 64x64 analog video router in a 128x128 frame, some input buffers will
not be present. If this is the case, the Input Numbers labeled on the
frame may differ.
Please DO NOT MOVE INPUT BUFFERS WITHOUT
CONSULTING SVS CUSTOMER SERVICE.
Connecting To Video Devices
Video sources and output devices (such as monitors, or recorders) may be connected to the routing
switchers through the BNC type connectors located on the back of the unit. Keep in mind that the output
signal format will be that of the input signal format.
All signal connections that use more than one cable interconnecting between devices should be of equal
timing length (example: cables between a camera and the switcher should have the same time delay).
When making cable connections to the input adapters, leave enough service loop in each coax cable to
allow for the removal and replacement of the adapter modules in the event that service is needed. It may
be easier to remove and reinstall adapter modules with the coax cable attached, instead of removing the
adapter from the cable. All inputs are terminated in 75 ohms and all outputs have a source impedance of
75 ohms. Unused inputs and outputs can be left with no connection. No external termination resistor is
needed.
Yosemite Family video routing switchers have two output BNC’s per destination. This is a particularly
important feature in the installation of the digital video router. The second BNC will save space and
prevent performance degradation problems associated with external digital distribution amplifiers but at a
lower cost. Unused video outputs can be left with no connection.