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Installation ~ Networking Units
14
Technical Services Group ~ 1-800-283-5936 (USA) ~ 1-801-974-3760
A system is defined as one or more AP units that communicate to perform
mixing functions. A system can consist of one unit in master-single mode or
several units that work together with one master-linked unit and multiple slave
units. Systems can be G-Linked together for easy reconfiguration, as shown in
Figure 2.5. The physical location on the G-Link network determines which system
individual units belong to. In Figure 2.5, for example, AP400 device 4 has been
designated as master-linked. The units located below this unit on the G-Link
network constitute System 3, while units above it belong to different systems. The
entire network could be easily reconfigured into one system by changing the mixer
mode on Devices 3 and 4 to slave units which would then refer to the only master-
linked unit on the system: AP400 device 0.
To set mixer mode
1. Press the System button. Scroll through the menu until you see Mixer Mode.
2. Press Enter, then scroll through the three options.
3. Press Enter at the appropriate option to select it.
4. Repeat this process for all AP units in the G-Link network.
EC reference
When multiple AP400 units are linked together and will use only one output channel
to drive the speaker system, this output must be defined as the acoustic source which
will be used by all of the linked AP400s. In other words, the output which the
master unit will use as the EC reference must be identified to the slave units via the
G-Link. See page 28 for details on echo cancellation setup for multiple units.
Errors
If the units are not connected correctly, you might experience a synchronization
error. Meter LED “+12” will flash red and Meter LEDs “0”, “-4”, and “-30” flash
green on affected slave units. The error is the result of one of two problems:
incorrect master/slave configuration or a broken G-Link connection.
If it is a master/slave configuration error, LEDs will flash on a unit that is
designated as a slave unit but does not have a master unit. To correct the problem,
make certain that Mixer Mode for the master unit is set to Master-Linked and not
to Master-Single.
If the error is in the G-Link connection, LEDs flash on the units that are not
physically connected to master unit. To correct the problem, check for broken
connections and reconnect the G-Links.
Figure 2.5. Multiple AP systems