User manual RANE MIC 1 DATASHEET

[. . . ] Professional Audio Products Data Sheet MIC 1 CONDENSER MICROPHONE General Description The Rane MIC 1 Condenser Microphone is a professional quality back-electret condenser microphone with an omnidirectional pickup pattern. Originally designed specifically for use with Rane's real-time equalizers and analyzers, it may be used with any real-time analyzer to measure room response and/or sound pressure levels. [. . . ] (See Application Information section for details). The MIC 1 is supplied with the RA 27 Realtime Analyzer and the RE 27 Realtime Equalizer. When ordering separately, please contact the Parts Department and specify part number 410-008. Features and Specifications Parameter Microphone Type Frequency Response Polar Pattern Impedance Sensitivity Maximum SPL Signal-To-Noise Ratio Phasing Power . . . . . . . . . . Voltage Range . . . . . . . . . . Rated Voltage . . . . . . . . . . Sensitivity Loss . . . . . . . . . . Current Demand . . . . . . . . . . Battery Cable Case Storage Temperature Operating Temperature Relative Humidity Specification Back-Electret Condenser 20 to 16, 000 Omnidirectional 1. 8k -64 (0. 63 mV @ 74dB SPL) 140 58 (re 94dB SPL) Non-inverting Limit 1 5% 3 Units dB Ohms dBV dB dB Conditions/Comments 6mm capsule +2dB at 20kHz With 2. 2k Ohms Load re 0dB=1V/µbar, 1kHz 1µbar = 74dB SPL 1kHz 1kHz, A-weighted Positive pressure on diaphragm equals positive output voltage Absolute Min & Max Ratings Min 1. 5 to 10 2. 0 10% -3dB @ 1. 5VDC 0. 5 Max 9 VDC Alkaline (Type 1604A) or (2) 1. 5 VDC Alkaline (Size AA) Attached; 40 ft (12. 2m) Long 6" x 9" (15. 2cm x 22. 9cm) -20 to 60 -18 to 50 0 to 95 VDC VDC mA oC oC % At 2. 0 VDC 1000 hrs (typ) continuous 4000 hrs (typ) continuous 1 cond. shielded; ¼" TS phone Zippered Heavy Black Vinyl -4 to 140 oF 0 to 122 oF Operating or Storage MIC 1 CONDENSER MICROPHONE Electrical Diagram Professional Audio Products Data Sheet Optional Battery Power Supply Application Information The MIC 1 is a back-electret condenser microphone. The "back-electret" is an improved version of the standard electret condenser design where the polarization charge voltage, or electret bias, is applied to the rear backplate. This provides increased mechanical strength, improved resistance to environmental effects, and better sensitivity and stability of the charge. Since the electret is permanently charged (we think 30 years qualifies as permanent) it does not need the high voltage powering common to standard condenser designs--a major benefit. This benefit is reduced, however, by the electret requiring an impedance converter (built-in JFET) which does need low voltage powering. So, as always, you just can't quite win. Details of the simple power supply appear in the Electrical Diagram. As shown, the recommended standard operating voltage is +2 VDC supplied through a 2. 2k ohms resistor. Usually the 2 volts is zener regulated to a higher voltage and resistively divided down. Regulation and tolerances are not critical; however, the supply should be as noise free as possible. While 2 volts is recommended, the MIC 1 runs equally well up to 10 volts. [. . . ] W. , Mukilteo WA 98275-5098 TEL (206)-355-6000 FAX (206)-347-7757 WEB http://www. rane. com Printed in the U. S. A. on Recycled Paper All features & specifications subject to change without notice 520-169 JUN96 [. . . ]