User manual
KRAMER ELECTRONICS LTD.
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7. For RS-232 control of the system, connect the PC to the Master switcher via the null modem adapter. Each
switcher in the configuration should be allocated a unique machine number and the "Reply" option should
be to “ ON” (see Table 3, "Table of DIP Switch Settings"). The system may also be controlled via RS-485.
8. Connect the sources to the appropriate switcher inputs.
9. Connect the power cable of each switcher to the mains supply and turn ON each switcher.
10. You now have a 24 or 36, etc. input switcher complex, with one output.
12.6 Video Component and YC Switching
A most important application for interconnected switchers is in professional component video switching, where
smooth switching is required, free from transient effects. Four switchers of the same type are required for RGBS
systems, three for RGB or YUV systems and two for YC systems. The following describes how to set up the
RGB video component application with five professional video sources, each with Red, Green and Blue (RGB)
outputs (Sync on Green).
NOTE
In the following description, "R", "G", "B" refers to three different switchers required for the RGB
implementation.
1. Interconnect three, same model switchers of the VS-1211 family via their RS-485 ports ("A" to "A", "B" to
"B", etc.).
2. On all the units except one, set the Dipswitch "Reply" option to OFF.
3. Set all the switchers to the same Machine number (Dipswitch).
4. If RS-232 control is required, connect the PC via the null modem adapter to the unit in which the "Reply"
option is set to ON (the system may also be controlled via RS-485).
5. To synchronize the machines (for vertical interval switching) to input#1 of the G unit, daisy-chain from
G's input #1 to the ext. sync input of R and continue to the ext. sync input of B (using "T" connectors).
Place the following jumpers in their alternate positions: J22 and J20 in the G unit and J21 in the R unit.
Also, ensure that the following jumpers are in their factory default positions: J34 in all the units; J20 in the
R and the B units; and J21 in the B unit. To synchronize using an external sync signal, configure R and B
as described above, but this time daisy chaining from G's ext. sync. Connect the external sync to G and set
G's jumper J20 and J22 to their factory default positions and J21 to its alternate position.
6. Now connect the R, G and B outputs of camera #1 to input #1 on each of the switchers respectively, those
of camera #2 to input #2 on each of the switchers respectively, and continue until all five camera R, G and
B outputs have been connected to the appropriate switcher inputs, in the same order. Let us call them
switchers R, G and B.
7. Connect the single outputs of switchers R, G and B to the R, G and B inputs, respectively, of a professional
acceptor, such as a monitor or VCR.
8. Turn the power ON and select the input number to be switched to the acceptor.
12.7 Controlling Several Independent Switchers Via a Single PC Port
1. Assign unique machine numbers to each switcher.
2. Connect via the null modem cable from the PC to the "Master" machine.
3. Interconnect the switchers via their RS-485 ports ("A" to "A", "B" to "B", etc.).
13.
TAKING CARE OF YOUR SWITCHER
Do not locate your switcher in an environment where it is susceptible to dust or moisture. These may damage
the electronics, and cause erratic operation or failure. Do not locate your switcher where temperature and
humidity may be excessive. Do not clean your switcher with abrasives or strong cleaners. Doing so may remove
or damage the finish, or may allow moisture to build up. Take care not to allow dust or particles to build up
inside unused or open connectors.
14.
TROUBLESHOOTING
NOTES:
1. Please note that if the output signal is disturbed or interrupted by very strong external electromagnetic interference, it
should return and stabilize when such interference ends. If not, turn the power switch off and on again to reset the machine.
2. If the recommended actions still do not result in satisfactory operation, please consult your KRAMER Dealer.