Version 3 november 2004 4 channel 1:4 active unity gain mic splitter operation manual.
Ms424 2.
Ms424 3 contents 1. Introduction 3 2. Technical specifications 4 3. Installation 4 3.1 inspection and un-packing 5 3.2 operating environment 5 3.3 ce standards 5 3.4 power requirements 5 3.5 external connections 6 3.6 signal levels 7 4. Warranty 8 5. Description of controls 9 6. Options 10 configura...
Ms424 4 1. Introduction the ms424 is a 4 channel 1 into 4 unity gain active microphone splitter in a compact 1u self powered case. The ms424 is designed for applications where multiple feeds are required from one set of microphones without the signal degradation experienced with most passive splitti...
Ms424 5 2. Technical specifications 2.1 electrical frequency response:: 20 hz to 20 khz, +0, -0.5 db input impedance:: 2 kΩ maximum input level: 0 dbu (+20 dbu with pad) equivalent input noise (ein): better than -121 dbu output source impedance: less than 50 Ω output load impedance: 150 Ω to infinit...
Ms424 6 3. Installation 3.1 inspection and unpacking the ms424 has been carefully packed at our factory in a carton designed to withstand handling in transit. Should the unit appear to have been damaged in transit, notify your dealer immediately and do not discard any of the packing. The carton shou...
Ms424 7 the rating of the rear panel fuse is as follows 230v 115v t100ma t200ma both are slow blow type please note: if the fuse requires changing at any time please ensure the correct type is fitted. An incorrect fuse could cause damage to the unit and may constitute a fire hazard. The detachable i...
Ms424 8 capacitor to chassis ground. This configuration prevents ground loop hum and ensures a low impedance path for rf (radio interference) away from the audio. Although the inputs are designed for 'balanced' signals either pin 2 or 3 can be connected to pin 1 for unbalanced operation. All outputs...
Ms424 9 4. Warranty your ms424 has been manufactured to a high standard using quality components. If correctly installed and operated the unit should give years of problem free operation. However in the event of a defect in material or workmanship causing failure of the unit within one year of the d...
Ms424 10 5. Description of controls phantom switch switches +48v from the internal power supply to the input connector on the rear panel. To prevent the chance of damage to any external pieces of equipment, do not use the +48v power option with unbalanced input sources i.E. Those where pins 1 & 3 or...
Ms424 11 output 2 connector transformer balanced and isolated output. 6. Options 6.1 configuration each channel of the ms424 consists an input stage and an output stage. These are connected internally by jumper links which allow the ms424 to be configured for the following options - option configura...
Ms424 12 the channel input stage is connected directly to it's associated output stage. This provides 1 input to 4 output splitting and is the factory default setting. Master the channel input and output stage are connected to the internal bus. The input signal is thus distributed to other output st...
Ms424 13 block diagram of the ms424 showing the channel and bus option jumpers. Channel input to output 1 link switching not shown - see diagram on following page. Only one input stage at a time should be connected to the internal bus (master mode) 6.3 internal bus jumpers there are also two jumpers...
Ms424 14 6.4 transformer balanced inputs transformer balanced inputs can be fitted to provide galvanic isolation between inputs and outputs. Although normally a factory build option, transformers can be retro fitted by an audient service centre..
Ms424 15 7.0 applications the ms424 is primarily designed to be used in theatres, fixed installations or touring companies who require split feeds of the same signal. The active design of the ms424 ensures that there is not loading or signal loss and as each output is independent a fault on one will...
