10
KRAMER ELECTRONICS LTD.
6
INSTALLATION
6.1
Rack Mounting
These machines may be rack mounted in a standard 19” (1U) EIA rack, and include rack “ears” at the ends of
the front panel. To mount them, simply place the unit's ears against the rack rails of your rack, and insert
standard screws through each of the four corner holes. These devices do not require any specific spacing for
ventilation above or below the unit.
7
CONNECTING TO DIGITAL VIDEO DEVICES
Digital video sources and output devices are connected to an SDI switcher or matrix through the BNC type
connectors on the back of the machine. SDI signals are very high frequency carrying signals, and are very
sensitive to cable quality and length. They are vulnerable to the “cliff effect” in which the signal will look good
after travelling a certain cable length, but when the line is only slightly extended, the signal crashes completely,
without any warning. Therefore, keep the length of the cables at the absolute minimum necessary.
The machines described in this manual have built in provisions to minimize signal loss and distortions. Both the
switcher and the matrices have built-in cable equalization circuitries to compensate for high frequency cable
losses, as well as “time-base correction” - reclocking circuitries, which eliminate signal jitter cumulated along
the cables. The reclocking circuitry regenerates the signal’s clock pulses, eliminating signal instability and
potential “cliff-effects”. With the built in equalization and reclocking circuitries, the switcher and matrices can
be operated at cable lengths and distances of hundreds of meters, when high quality cables are used.
7.1
Turning On the Machine
NOTES
1) The machine should only be turned on after all connections are
completed and all source devices have been turned on. Do not attempt
to connect or disconnect any video signal while it is on.
2)
The socket-outlet should be near the equipment and should be easily
accessible. To fully disconnect equipment, remove the power supply
adapter from the mains socket.
1) Connect the machine's mains socket to the wall socket using the power cord (provided with the machine).
2) Operate the source and the acceptors.
7.2
OPERATION
❒
Connect up to eight (SD-7308, SD-7388) or sixteen (SD-7316) SDI sources to the input sockets.
❒
Connect up to four (SD-7308) eight (SD-7388) or sixteen (SD-7316) SDI acceptors to the output sockets.
❒
If required, connect the RS-232 port to a PC (or other controller), using a null-modem connection.
Connect via the null-modem adapter provided with the machine (plug the adapter into the PC, and connect
from the adapter to the machine with a flat-cable). Alternatively, the null-modem connection may be wired
as shown at the end of the manual. With the SD-7388 and SD-7316, an RS-232 OUT connector is
provided for continuation of the RS-232 line to the next controlled device.
❒
Connect the RS-485 connector with simple wires to the next Matrix or controlling device (SD-7388 and
SD-7316 only).
❒
Connect a Genlock source to either the ANALOG genlock inputs (SD-7388, SD-7316) or to the DIGITAL
Genlock input (if you have purchased the DIGITAL genlock option). If you plan to use the Genlock
ANALOG source for another machine, connect a cable to the other ANALOG Genlock socket, leading to
the next machine - and release the termination switch. If you do not wish to continue the ANALOG
Genlock line to another device, press the termination switch IN for proper 75
Ω
line termination.
❒
If required, install the software provided in the PC which will control the switcher.
❒
Operate the sources, the acceptors and the switcher, and, if required, run the PC program.
❒
Select the desired source by pressing the appropriate touch switch on the front panel, or by clicking the
appropriate mouse button (SD-7308), or source and acceptor buttons (SD-7388, SD-7316).
