5 MX8750 INSTALLATION AND OPERATION
5.1 Configuration and Signal Processing
All configuration and signal processing parameters are accessible and controlled using EAW’s MXWare
software program. The program provides an easy user interface to access all MX8750 functions except
Power on/off, Device ID (identification) and Data Select. These functions can only be controlled using the
hardware switches on the MX8750.
WARNING: Using incorrect or improper parameters with a loudspeaker can result in damage to the
loudspeaker. Be sure the settings you make do not exceed the capabilities of the drivers in the
loudspeaker system you are controlling.
5.2 Front Panel Controls / Indicators / Connector
5.2.1 Power LED
The POWER LED indicates that the unit is powered and turned on. The power switch is located on the
rear panel.
5.2.2 Input Headroom Indicator
The INPUT headroom indicator is a six-segment peak-responding bar graph that indicates the signal level
from -20 dBu to clipping. The headroom indicator monitors the input to the A/D converter, after the input level
control. Ideally, you want the highest peak level to illuminate the +12 dBu segment, but not the CLIP segment.
You can set the level lower than this, but understand that you are reducing the signal-to-noise ratio.
5.2.3 Mute Switches
Each output channel has a MUTE switch and a mute LED. The MUTE switch mutes that output and the
MUTE LED glows red when that output has been muted. The mutes can be activated using either the
hardware switches on the front panel or using the mute functions in the MXWare program.
5.2.4 Signal Indicators
Each output channel has a sig LED. This LED glows green for any signal at that output. If the output
level exceeds the limiting threshold, it glows red at the limit threshold. Note: the sig LEDs will indicate
this threshold even when the limiters are bypassed. Occasional flashing red is OK. However, if the sig
LED is rapidly flashing red or is a steady red a large percentage of the time, the input signal to the loud-
speaker is exceeding the loudspeaker’s capability and the volume level should be reduced.
5.2.5 RS232 connector
The DB9-F connector is for connection to a COM port on a computer running EAW’s MXWare program.
When two or more MX8750s are linked together, only one processor is connected to the computer. This
connector is wired in parallel with the RS232 connector on the rear panel.
5.2.6 Device ID
This set of 4 dip switches is used to set a unique identification number when linking several MX8750s
together. See Section 5.5 for details.
5.3 Rear Panel Controls and Connectors
5.3.1 Balanced Inputs
Each of the two XLR-F connectors is a transformerless balanced input designed to accept line level signals.
Page 6
(4 Seiten)
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