Glm.se™ Control Network - Genelec SE Operating Manual

GLM.SE™ Control Network
Network Interface Device with Genelec Soundcard
The Network Interface serves as the communicator between the SE7261A on the control network and
the computer. Attach the Network Interface to a USB port. The device driver is installed automatically. The
Genelec Soundcard is automatically enabled only when AutoCal is run.
The USB cable runs from the computer to the Network Interface. Once the Network Interface is connected
to the computer flashing lights on the interface indicate that the network is active. If no communication
lights are flashing, check that the control network cable and the USB cable are securely attached and the
GLM.SE™ software is running.
The GLM.SE™ network runs on a CAT5 cable. These are the same cables that are used for Ethernet.
Instead of using Ethernet for communication with the SE7261A, Genelec uses a proprietary protocol
defining the method of communication between the SE7261A and the Network Interface that connects to
the USB port on the computer.
There are several important reasons why a USB interface is used instead of, for example, the Ethernet.
This keeps the network running at all times, even if the computer crashes. The Network Interface acts
as the master controller on the network, and communicates to all aspects of the SE7261A, even if the
computer is rebooting.
The Genelec network uses a proprietary communication protocol to ensure integrity of communication to
and from the SE7261A. The Network Interface is used as a translator between the Genelec control network
and any computer hardware using it. This ensures that loudspeaker control traffic remains insulated and
secured from any public networks. This is necessary because of the possibility of congestion on public
networks (loudspeaker control messages do not get through), and in order to limit the range of access
(outsiders on a public network could possibly control the loudspeakers).
The USB interface is ubiquitous in the computer world. A USB cable run is normally limited to 5 m (15
ft.), but this is not a problem. The computer network cable from the Network Interface can extend to any
practical distance needed. If the Network Interface cannot be placed close the computer the USB cable
can be extended with actively buffered cables up to 25 meters (75 ft.) in length.
Note
If the Network Interface is disconnected or the computer is powered down, the GLM.SE™ software will no
longer control the SE7261A. In that event, the system maintains its current settings until the subwoofer is
powered down or the "STORED" dip switch on the SE7261A is moved.
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