BSS Audio
MSR-604ii User Manual version v1.4
Page 13
This disconnection would be implemented either in the connector, or at the
monitor console multiway connector wiring point.
Other systems of earthing can be implemented, such as using the stage earth as the
main star point, in which case the system ground switch would be set to
‘grounded’, or to use the stage monitor console as the main star point.
In any system it is important to remember:
a) Choose one star point for all grounding.
b) Ensure all microphone screening is permanently held to this ground.
c) Ensure that the two main earthing systems, namely stage and front of house, do
not accidentally short together.
d) Avoid sending signal currents along cable screens.
If these simple guide lines are followed, then implementation of the MSR-600
system will be completed without any troublesome earthing faults, and full safety
will be implicit within the design.
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.3 Channel coding
In a system with more that one MSR-604ii unit, identifying which channel of which
MSR is the actual system channel will become necessary, and the small pre-
numbered self-adhesive labels supplied with the MSR-604ii can be used for this
purpose.
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.4 Dual power supply operation
fitting of these labels to the MSR-604ii front panel.
The power supply of the MSR-600 system performs a vital role within the sound
system and although designed to exacting standards for ultimate reliability, some
systems will require a back-up which would automatically take over on failure of
the main supply.
This is implemented within the MSR-600 system such that any two MSR-602ii units
can be directly connected together. Both units are switched on at all times, and
power sharing ensures that the system will continue to operate should either unit
fail.
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.5 Output drive level setting
Each MAIN output and MON output can be individually set to drive at mic or line
level. A third setting which may be described as ‘Hot mic level’ is also available in
order to provide a headroom structure which is compatible with previous versions
of the MSR-604.
All outputs are set to mic level when the MSR-604ii leaves the factory. Note that
the FEED outputs are set for clip at +3dBm (mic level) only and cannot be changed.
