Shure SM80 دليل المستخدم

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THE SOUND OF THE PROFESSIONALS@ PROFESSIONAL PRODUCTS
GENERAL
The Shure Model SM80 is a high-quality, omnidirec-
tional condenser microphone designed for the most
demanding professional applications in studio record-
ing, broadcasting and sound reinforcement. It is
especially suitable for applications requiring extremely
wide frequency response, low noise and distortion
characteristics, very low RF susceptibility, and reliable
operation over a wide range of temperature and humid-
ity extremes. T

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Output Impedance Case Steel construction with metallic vinyl paint finish and Rated at 150 ohms (85 ohms actual) stainless steel screen Recommended minimum load impedance: 800 ohms (May be used with loads as low as 150 ohms with Dimensions reduced clipping level) See Figure 3 Output Level (at 1,000 Hz) Open Circuit Voltage . . . . . . . . . . . . . . . . . . . . . . . . -65 dB (0.56 mV) (0 dB = 1 volt per microbar) Power Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -

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ohms, but a reduction in output clipping level will result. loading (3300 ohms in the Shure PS1A Power Supply) to the microphones. RESISTOR R VALUES FIGURE 7 ISOLATION NETWORK better to assure close matching, although the absolute FIGURE 4 value is not critical. Note that the two-resistor phantom PS1A POWER SUPPLY power supply (Figure 5) presents a load equal to 4R, Connect the microphone cable to the SM80 and the paralleled with the mixer input impedance, to the SM80. power supply MICROPHONE co

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that this circuit can on/y be used with balanced, floating input. A resistive attenuator can be inserted in the microphone line ahead of the mixer to minimize this. (ungrounded), transformer-coupled input mixers such as the Shure M67 or SE30. The resistors should be 1% The Shure Model A15AS Attenuator (15, 20 or 25 dB switch selectable) is specially designed for use with tolerance or better to assure close matching. With new batteries, this supply will operate an SM80 for approx- condenser micro

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BLOCK DIAGRAM FIGURE 10 frequency response switch and a lockable 10 dB at- SERVICING tenuator pad. TROUBLESHOOTING The overall dimensions shall be 212 mm (8-11/32 in.) Due to the high packing density and circuit com- in length by 23.5 mm (15/16 in.) in diameter. The handle plexity of the SM80, only basic servicing is recom- diameter shall be 20.1 mm (25/32 in.). The weight shall mended. The following steps should be taken if be 230 grams (8 oz). problems arise. The microphone shall be capable of