User manual SENNHEISER MKH 30

[. . . ] The capsule 01a RF condenser microphone presents, contrary to low Irequency circuits, a low impedance output. Instead 01 the high polarization voltage normally required, a high Irequency capsule needs only a high Irequency voltage 01 about 10 volts, wh ich is produced bya built-in low noise oscillator (8 MHz). the low capsule impedance leads to a high performance reliability 01 the microphones. Powering and Connection Sennheiser electronic introduced A-B powering, which was then standardised in DIN 45595. [. . . ] Powering and Connection Sennheiser electronic introduced A-B powering, which was then standardised in DIN 45595. Two wires are required to connect the microphone when this powering system is being used. The operating current is led along the same wires as the audio Irequency signal, so that the circuitry in the microphone does not have to be connected to earth. Because 01this earth Iree technique the highest possible values 01 immunity Irom noise or disturbance are achieved. the connection 01 Sennheiser condenser microphones and dynamic microphones as weil is carried out using the principle 01 voltage matching. The advantages 01this system are that neither impedance vBriations 01 the microphone output nor 01the amplilier input exercise a noticeable inlluence on the total Irequency response. The source impedance 01the Sennheiser condenser microphones with A-B powering is so low (approx. 8 Q at 1000 Hz) that an amplilier input with an impedance 01 at least 400 Q will be suitable. However, il the input impedance is smaller than 400 Q, a resistor 01 appropriate value should be placed in series with the microphone so that it "sees" at least 400 Q. The voltage division caused by this series resistor must 01 course be considered. This means that the voltage drop across the resistors is approx. In this case the microphone is simply connected to the input 01 an amplilier via a powering adapter MZA 16 T or the power supply unit MZN 161. In many cases, lor example most tape recorders, the input socket is unbalanced. in this case one pin 01the balanced microphone output has to be earthed (prelerably pin 3). When using the power supply unit MZN 16 T an unbalanced operation only is possible after a modilication 01the power supply unit. Apart lrom cases where the 7 Standard response curve with tolerances The original diagram is included with each microphone, measured from 50 . Swivel Mount MZG 415 The swivel mount gives the possibility to use the desk stand MZT 441 together with the microphone clamp MZQ 415 or the shock mount MZS 415 far the MKH 30. With %" threads and prevents recordings being disturbed by footfalt far other strong mechanical disturbances. Desk Stand MZT 100 Very stable desk stand for studio use. Features very good handling noise sUBpression. [. . . ] Desk Stand MZT 100 Very stable desk stand for studio use. Features very good handling noise sUBpression. The combination is particularly weil suited for outdoor reporting use and features easy handling and insensitivity to wind and handling noise. Power supply MZN 16 T and MZN 16 T-U For simultaneous powering of two microphones. [. . . ]