Controlling the Switcher
11
2. The input impedance of each input is now "High-Z" (not 75ohm terminated)
and is therefore suitable for this application. Inside the second switcher, leave
the terminating jumpers stay in place, providing 75ohm terminations. Thus,
you do not have to open the second switcher. Carefully close the first switcher.
3. Connect the output from video source #1 to the first switcher input #1, then to
the second switcher input #1 using a T or Y connector. Repeat for source #2
and input #2, and so on.
4. Connect one acceptor to the output of one switcher and another acceptor to the
output of the other switcher. You now have a 6 input switcher complex with
two outputs.
5. You can continue to expand the number of outputs by adding a third switcher,
to obtain a 6x3 switcher, and so on.
In such cases, relocate to their alternate position, all the input jumpers in all the
switchers except the last, so that all the lines are properly terminated by
75ohm. Audio can be connected in a similar manner, but you do not have to
open the switchers and remove the jumpers, just connect the wires from the
audio input to the audio input. There is no need for special termination since
the input impedance is high.
6. For RS-232 control of the system, connect the PC to the Master switcher via
the null modem adapter.
7. Each switcher in the configuration should be allocated a unique machine
number and the "Reply" option should be set to ON (see Table ).
Jumper J35 should be relocated to its alternate position.
8. The system may also be controlled via its RS-485 port (see section 7.1).
6 Video/Audio Sources
Genlock
Source
2 Video/Audio Acceptors
Figure 4: Combining Two Switchers to Create a 6x2 Switcher
