BSS Audio MSR-602/604II Owner's Manual - Manual (Page 22)

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MSR-600 II Series
4.4 Dual Power
Supply Operation
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-
602 II 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 (see figure 10).
Dual Power Supply Operation
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-604 II leaves the factory.
Note that the FEED outputs are set for clip at +3dBm (mic level) only and
cannot be changed.
The OUTPUT LEVEL SELECT header blocks are clearly marked on the
main PCB and are described in Table 1
TABLE 1 OUTPUT LEVEL SELECT JUMPERS
Function Jumper No. PCB identification
Channel 1 MAIN OUT JP2 CH1 MAIN O/P
Channel 1 MON OUT JP1 CH1 MON O/P
Channel 2 MAIN OUT JP6 CH2 MAIN O/P
Channel 2 MON OUT JP5 CH2 MON O/P
Channel 3 MAIN OUT JP10 CH3 MAIN O/P
Channel 3 MON OUT JP9 CH3 MON O/P
Channel 4 MAIN OUT JP14 CH4 MAIN O/P
Channel 4 MON OUT JP13 CH4 MON O/P
Fig. 10 Dual Power
Supply Connection
4.5 Output Drive
Level Setting