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BSS Audio MSR-604ii Operation & User’s Manual

BSS Audio MSR-604ii Manual Online:

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BSS Audio MSR-604ii User Manual
BSS Audio MSR-604ii User Guide
BSS Audio MSR-604ii Online Manual

Text of BSS Audio MSR-604ii User Guide:

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 1 V 1.4 JMK 4 th December 1997 MSR-604ii User Manual This equipment has been tested and found to comply with the following European and international Standards for Electromagnetic Compatibility and Electrical Safety: Radiated Emissions (EU): EN55013 (1990) Associated Equipment RF Immunity (EU): EN50082/1 (1992)RF Immunity, Fast Transients ESD Mains Disturbance (EU): EN61000/3/2 (1995) Electrical Safety (EU): EN60065 (1993) IMPORTANT SAFETY INFORMATION DO NOT

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 2 Contents 1 Introduction 3 1.1 MSR-604ii Mic/line signal splitter 3 1.2 MSR-602ii Power supply 4 2 Unpacking 5 3 Connections and control descriptions 5 3.1 AC Power connections and control settings 5 3.2 Voltage setting 7 3.3 Safety earthing 7 3.4 AC Power fusing 7 3.5 DC Power connections 7 3.6 Audio connections 7 4 MSR-602ii Controls 9 5 MSR-604ii Controls 10 6 System implementation and use 11 6.1 Racking 11 6.2 Grounding 12 6.3 Channel coding 13 6.4 Dual power supply operation 13 6.5 Output drive level setting 13 6.6 Multiple output distribution amplifier configuration 14 7 Compatibility with Pre-MkII systems 1

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 3 1 Introduction It is not uncommon within a sound system which uses microphones as a source of program, for that microphone to be connected to the input of a number of different processing facilities. An example of this would be in sound reinforcement work where a stage microphone is required to drive the main ‘front of house’ mixing console, the stage monitoring mixing console, a mobile recording studio and quite possibly an outside broadcast recording vehicle. It is also common within such a system for the microphone to be connected to considerable lengths of shielded cable

  • BSS Audio MSR-604ii User Manual version v1.4 Page 4 activated from the front of house mixing console by switching the desks phantom supply. This remote attenuator allows the engineer to preserve the channel headroom directly from the console in the event that an input is overdriven. Each channel also provides a separate phantom powering selector switch providing an

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 5 2 Unpacking As part of our system of quality control, this product is carefully inspected before packing to ensure flawless appearance. After unpacking the units, please inspect for any physical damage and retain the shipping carton and all relevant packing materials, should the unit require repacking. In the event that damage has occurred, immediately notify your dealer, so that a written claim to cover damages can be initiated. Because this equipment is connected between

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 6 The wire which is coloured brown must be connected to the terminal which marked with the letter ‘L’ or coloured red. Those units that are supplied to the North American market will have an integral moulded 3 pin connector which is provided to satisfy required safety standards. 3.2 Voltage setting The mains voltage selector switch provides simple, external adjustment for operation on all international AC power standards. At each switch position there is an ac

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 7 Transient suppressor replacement at the rear of this manual for the removal and replacement procedure. 3.5 DC Power connections DC connection between the MSR-604ii units and the MSR-602ii power supply is by the integral multicore cable with 9 pin D connectors. Note that the MSR-602ii power supply must always be located above the MSR-604ii units. (NB - this is opposite to the way early MSR-604s were racked.) Having the power supply at the top gives superior hum performance, and also places the HEADROOM meter and headphone amplifier in the most convenient position where they will not be obscured by c

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 8 For consistent remote attenuator switching and microphone screening, it is important that the pin 1 earth connection is maintained. (See section 6.5; Output drive level setting for configuring the output drive level.) Mon out - rear panel: This is electronically balanced, non floating, and should be connected to the stage monitor mixing console or ancillary console which is being operated within the same grounding system. This output

  • BSS Audio MSR-604ii User Manual version v1.4 Page 9 4 MSR-602ii Controls System ground This switch, located on the rear panel, is the main grounding point for all the MSR- 604ii units connected to the system. The switch will connect the electronic/signal ground to chassis earth when in the ‘EARTHED’ position. The switch will disconnect th

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 10 5 MSR-604ii Controls Phantom On/off The MSR-602ii power supply provides each MSR-604ii with 48v DC for phantom powering capacitor microphones. This is selected by operating the individual channel switch and it is connected across the ‘input’ connector in the standard phantom powering manner. Typical current availability is 10mA per channel for a 40 channel system. Phantom power is indicated by a front panel LED. It should be noted that phantom powering is interlocked to the LINE/MIC switch so that when LINE input is selected phantom power and the LED indicator are disa

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 11 Because the attenuator slightly degrades the noise and common mode performance of the unit it is recommended that the system is set up and calibrated without the remote attenuator activated, and that it is reserved for emergency use as described above. The remote attenuator function cannot be disabled, so the engineer should observe the same caution with the desk phantom switch as he would if a phantom powered microphone were directly connected to the desk input. CAUTION! Use of the desk ph

  • BSS Audio MSR-604ii User Manual version v1.4 Page 12 b) Contact your BSS agent to obtain a mu-metal shield which may be affixed to the top cover plate of the MSR-602ii. c) Reduce the number of units in the system. (The stray magnetic field is proportional to the current demanded from the PSU.) In all cases, the MSR-602ii and the MSR-604iis MUST be fully supported along t

  • BSS Audio MSR-604ii, 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 ea

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 14 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 TABLE 2 - OUTPUT LEVEL SELECT HE

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 15 connected to its own output section. The default jumper positions are identified on the PCB by a white block printed adjacent to the relevant jumper pins. The signal labelled EXBUS-OUT passes via the LOOP OUT connector to the EXBUS-IN terminal in the LOOP IN connector on the adjacent unit, allowing a D.A. channel to span more than one MSR-604ii unit. It will be apparent from the above example that the permutations of D.A. blocks that can be configured within a system is limited only by the number of MSR-604iis that are connected in the rack. The limiting facto

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 16 Rack installation The new units should be mounted at the top of the rack, away from the MSR-602 power supply. If more than one MSR-604ii is being installed, the LOOP IN/LOOP OUT connectors are ‘daisy’ chained’ together as described in section 3.5; DC Power connections. Finally the pair of adapter leads are used to insert the MkII units into the systems power circuit. 7.2 Installing Pre-MkII MSR-604iis in a new system Ea

  • BSS Audio MSR-604ii User Manual version v1.4 Page 17 8 Appendix A 8.1 Circuit description The DC supply regulator circuits (not shown) are common to all channels. The rails to each channel are protected by fusible resistors so that in the event of a short circuit fault in one channel the other three are not affected. The input signal passes via RFI filters to the MIC/LINE switc

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 18 9 Service section 9.1 Transient suppressor replacement The primary of the mains transformer within the MSR-602ii is protected against high voltage spike interference by two voltage dependent resistors. These provide a short circuit to voltage peaks in excess of their maximum rating. Should the MSR-602ii be inadvertently connected to 3 phase line/line voltages, or to 240V when selected to 120V, or any other incorrect voltage, these suppre

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 19 10 Warranty Information When sold to an end user by BSS Audio or a BSS Audio Authorised Reseller, this unit is warranted by the seller to the purchaser against defects in workmanship and the materials used in its manufacture for a period of one year from the date of sale. Faults arising from misuse, unauthorised modifications or accidents are not covered under this warranty. No other warranty is expressed or implied. If the unit is faulty it should be sent to th

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 20 11 Specifications MSR-604ii Channels Four: Independent or internally interconnected Inputs XLR-3F Electronically balanced (Transformers optional) Microphone Line Impedance 2kΩ 10kΩ Max. input level +13dBu +33dBu CMRR >90dB @ 1kHz >75dB 50Hz to 10kHz Phantom Power 48VDC via panel switch and LED indicator Outputs Main (FOH) & Mon XLR-3M, Electronically balanced (Transformers optional) Max level (internally preset) +3dBm +13dBm +23dBu Impedance <23Ω <71Ω <100Ω Max load 200Ω 600Ω 600Ω Feeds Two, XLR-3M, Transformer ba

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 21 Frequency Response <+/-0.5dB 20Hz to 20kHz Noise (E.I.N.) (20Hz to 20kHz) -10dB gain <-114dBu 0dB gain <-121dBu 10dB gain <-124dBu 20dB gain <-125dBu 30dB gain <-126dBu Distortion (T.H.D) <0.01% 20Hz to 20kHz @ 10dB below clip Level Metering & Monitoring Channel Clip LED @ 1dB below clip Headroom meter on MSR-602ii PSU Six point LED meter 0,-1,-3,-6,-12,-26dB Via Listen switch (momentary) Headphone monitor on MSR-602ii PSU Via Listen switch (momentary) Stereo/Mono 1/4in Jack socke

  • BSS Audio MSR-604ii, BSS Audio MSR-604ii User Manual version v1.4 Page 22 DC Outputs +27V unregulated @ 4A max: low ripple -27V unregulated @ 4A max: low ripple +48V +/-5% regulated @ 500mA max Rear panel fuses F5A(+27V) F5A(-27V) F500mA(+48V) Connectors 9 pin ‘D’ female Loop out 9 pin ‘D’ male Loop return System Ground Lift Rear panel slide switch Indicators 3 LEDs, post fuse, on +27V, -27V and +48V outputs Headroom Meter Via Listen bus and MSR-604ii Listen switch (momentary) Six point LED meter

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