m908 User Manual, Rev. G
temperatures, and to ensure long term reliability, it is equipped with a 40mm variable speed fan.
Whether or not this fan turns on is dependent on several variables. These are: ambient
temperature, whether there is air movement around the m908, and if the m908 is mounted
directly above or below other heat generating equipment.
The variable speed fan comes on to cool the internal circuits if the main circuit board
temperature rises above 55ºC (131ºF). The fan has three speed ranges which are triggered by the
following pcb temperature thresholds:
1. Low: 55ºC (131ºF)
2. Med: 60ºC (140ºF)
3. High: 65ºC (149ºF)
If the m908 is mounted without space above and below and it is adjacent to heat generating
devices then the internal temperature can rise above 55ºC and the fan will come on.
If the m908 is being used in an area where fan noise is undesirable it is recommended that the
m908 be mounted such that it has space below and above the chassis and where the ambient
temperature does not exceed 30ºC (86ºF).
5 Operation
Out of the box the m908 comes with a many factory presets that will allow for quickly
connecting the most common input sources, cue, and speaker systems. If your installation
requires customization, then see the
and
sections of this manual.
Otherwise read this section for the basics on operating the m908.
The m908 uses a closed loop control system to ensure that the status reported on the RCU
matches the actual hardware setting in the ACU. Any changes made to the configuration of the
system are transmitted to the ACU, where they are processed and reported back to the RCU for
confirmation. The following sections detail all of the controls and features of the normal
operation mode.
5.1 Manual conventions
Throughout the Operation and Setup sections of this manual references to screen elements and
setup menu parameters will use the following formatting:
•
Hardware controls and connectors will be in ALL CAPITAL LETTERS
•
Switches with secondary functions will be (in parentheses)
•
Setup menu screen names will have the First Letter capitalized
•
Setup parameter names will be in
bold lower case
•
Setup parameter values will be <enclosed>
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