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Each projector can be assigned a unique 3-digit projector number (for example, 001).
These numbers are necessary when you are working with multiple linked projectors,
enabling you to direct commands to a certain projector rather than always
broadcasting to the entire network. For complete information on how to assign
projector numbers, see 3.7, Adjusting System Parameters and Advanced Controls.
NOTE: To loop a single incoming video source through to another projector or
display device on a network, see Video Loop Through in 2.4, Source Connections.
At manufacture every keypad is assigned "A" as its default protocol, which is simply
a collection of settings that determine how the keypad operates. Once assigned, this
protocol remains in effect until it is changed—that is, the keypad will operate as it
currently does until you change its protocol.
Protocols are most useful for multiple-projector applications. For example, you might
want to change a keypad protocol if you are working with two projectors and two
remote keypads in the same room and need to control each projector independently
(Figure 2.29). When Keypad A has a different protocol than Keypad B, each keypad
communicates only with the projector having a matching protocol. Or, if you have a
network of two or more projectors connected together via RS-232 serial ports, you
may want only certain projectors to respond to a wired keypad, thus you can use
different protocols to limit responses.
NOTE: Matching the protocol on the projector to that of a keypad is done through a
setting in the Communications menu. See 3.7, Adjusting System Parameters and
Advanced Controls for further information on how to change the projector's infrared
sensor (rear and front) protocol.
A protocol for either type of remote keypad — IR or wired — can be changed
through software commands entered on the keypad. A new protocol set through
software commands remains in effect until the keypad batteries are removed and
replaced (if an IR remote), or until the keypad is unplugged (if a wired remote). A
remote can also be changed manually —you can "hard-wire" new jumper settings
inside the keypad so that they remain in effect until you change the hard-wiring. Note
that a hard-wired protocol can be temporarily overridden by the software protocol
change, effective until the keypad is unplugged and plugged in again (if a wired
remote) or until a battery is removed (if an IR remote).
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