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Some computers can provide
adapter or external converter) rather than the more common RS-232. RS-422
communication has differential "transmits-and-receives" and is generally better
suited for long distances than is RS-232 communication. RS-422 is not compatible
with RS-232—connecting one to the other could damage the equipment at either end.
If you wish to control the projector with a computer and/or other controlling device
(such as the Two-Way Controller) having RS-422 capability, connect
communication cables between the computer (or other device) and either (or both) of
the projector serial ports labeled
located near the upper right corner of the projector's front control panel (see Figure
2.25). Use an
port only if your equipment has RS-422 capability—always
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first consult the documentation supplied with your equipment.
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You may wish to use one or more external Marquee Signal Switchers or a third party
switcher in order to significantly increase the number of sources you can select. If
you are using a Marquee Signal Switcher, connect the switcher's RGB output to
serial communications (often through a plug-in
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—these 6-pin XLR connector ports are
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