User manual SENNHEISER MKH 816 TU-3

[. . . ] The source impedance 01the Senn heiser condenser microphones with A-B powering is so low (approx. 8 Q at 1000 Hz) that an amplilier input with an impedance 01at least 400 Q will be suitable. However, il the Input impedance is smaller than 400 Q, a reslstor 01 appropriate value should be placed in se ries with the microphone so that it "sees" aleast 400 Q. [. . . ] When apressure signal strikes the capsule Irom the lront pin 2 01the XLR-connector goes positive with relerence to pin 3. Connection to balanced microphone inputs In this case the microphone is simply connected to the input 01 an amplilier via a battery adapter MZA 16 TU or the power supply unit MZN 14 TU. Connection to unbalanced microphone inputs For connection to unbalanced inputs contact 3 01the connecting cable between the powering unit and microphone has to be grounded. Note: With the MZN 16 TU this is only possible after the unit has been modilied. Apart Irom cases where the microphone is being used lor prolesslonal studio purposes, thls IS not critical, as the large output voltage 01the mlcrophone combined with its low output impedance provi des a large signal to noise ratio. Care should be taken, however, that no multiple ground circults are lormed when the microphones are mounted on tripods etc. Connection to microphone inputs with high sensitivity II the unit being used has a very high Input sensitivlty, i. When it IS normally intended lor use with dynamic microphones, it can be necessary to reduce the output voltage Irom the microphone by means 01 a voltage divider, which should be built into the microphone cable at the mlcrophone input. By this means the large signal on the microphone cable is maintained up to Just belore the microphone Input, which results in a Increased signal to noise ratio. Connection to mixers and sound recording equipment with powering facilities II an approprlate voltage source is available the condenser microphone can be powered directly. the voltage should be 12 volts :t 2 volt. It should be so stabilised and filtered, that the unweighted noise voltage is less than 5 {lV and that the weighted noise components are less than 2 {lv. the current consumption 01the microphone is approximately 6 mA. According to the DIN standard the resistors should be 2 x 180 Q. [. . . ] The advantages 01this system are that neither impedance variations 01the microphone output nor 01the amplilier input exercise a noticeable inlluence on the total Irequency Equlvalent sound pressure level accordlng to CCIR 468-1 curve A . The combination is particularly weil suited for outdoor reportlng use and features easy handling and high Insensitivity to wind and handling noise. 1777) Filted at both ends with XLRconnectors. [. . . ]