Kramer Electronics TailorMade - Manual (Page 4)

4
K R A M E R
E lectron ics
MATRIX ROUTING SWITCHER
1 HARDWARE
1.1 GENERALITIES
The Kramer matrix switchers are used to select and
dispatch electric signals, as audio, vidéo and RGB,
to several destination simultaneously. The
impedances of each machine which is connected on
the matrix are well respected, even if a signal goes
to two outputs and more. As a matter of fact, a
signal under 75 Ohms can’t be delivered on several
loads without any amplification dispositive.
In fact, each output is able to select one, and only
one, input. We can consider the matrix routing
switcher as an assembly of several selectors which
are adjacents and connected on common inputs.
Each selector is fully independent, and individually
controlled. When two selectors,or more, request the
same source, this last is then distributed. So, it have
to be buffered to avoid losses of electric level and
reduce of bandwidth. The number of selectors
depends of the power and the quality of the buffers. The control of the switching and the others
commands is provided by an interface RS232/422,
via an internal bus.
The routing switcher don’t make use of a keyboard
in front panel. The access of this keyboard should
not be easy, or impossible, when the matrix is at the
heart of the audio and video lines, to have the
shortest length.
A supervisor, a computer or a remote control panel
must necessarily control the matrix by the RS232
and RS422 connectors.
Several LED lights on the front panel shows the
receipt of the RS232/422 datas, the kind and the
result of the actions.
An electric power supply provides four various
tensions the the cards of the machine.
1.2 RACK DISPOSITION
The cards are housed in a 19 inches rack, with 360
mm depth, and a height which is multiple of 3RU,
according to the number and the dimensions of
each section.
Many section, as audio, video, RGB, YC, or YUV,
can be inserted in the same rack. The cards are introduced by the rear panel and
support the audio and video plugs.
These are BNC for composite video, components,
YC and RGB. For the audio, (balanced or
unbalanced), the plugs are terminal blocks 6 points
detachable.
Rear view.