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Anleitung Zusammenfassung
The wide and flat frequency response of the CTM 77 provides natural transparent sound quality. The cardioid pickup pattern minimizes annoying feedback (when used close to sound reinforcement speakers and monitors) and reduces the pickup of unwanted off-axis sounds. A transformerless electronic design provides optimum low frequency response and low distortion. An effective internal multistage pop filter minimizes wind and breath noise. The locking on/off switch provides excellent flexibility of use. The CTM 77 has a Flex-Form™ hardened steel grille screen that dramatically resists deformation while greatly reducing any risk of adverse performance caused by a bent or dented ball screen. This unique ability to retain its original shape assures that the CTM 77 will maintain its attractive appearance. The CTM 77 features the exclusive (I.N.R.-3™) Impact Noise Rejection system. Our proprietary rubber shock mount isolates the transducer from the barrel, thus dramatically reducing cable, stand and handling noise. The need for any external shock mounting device is virtually eliminated. The low-frequency response of the CTM 77 may be enhanced by increasing or decreasing the distance from the sound source. This phenomenon is technically known as “proximity effect”. Nominal or “flat” response is generated at a distance of 24 inches or more. However, as the distance to the sound source decreases, the bass sensitivity increases, providing a solid, robust character. The CTM 77 is supplied complete with a zippered vinyl protective pouch and a snap-in microphone swivel-mount. CAD Quality All Astatic CTM 77 microphones are audio tested and inspected prior to shipment. Our absolute commitment to quality insures that Astatic microphones remain the Best Value in today's competitive industry. Operation and Maintenance The Astatic CTM 77 is one of the finest instrumental and recording microphones available. Although it is extremely durable, it should be stored in the zippered pouch provided to protect it from dust and dirt when not in use. If the front screen becomes soiled by dirt or residue, it may be cleaned using the following procedure. Unscrew the front screen assembly and remove the inside foam windscreen. Wash the foam windscreen using a mild detergent, and let dry thoroughly. Follow the same method for the grille screen. To clean the mike housing, use a cloth dampened with isopropyl alcohol. Specifications Generating Element: Electret condenser (Phantom Powered) Polar Pattern: Unidirectional (Cardioid) Frequency Response: 50 Hz - 18 kHz Output Level: Open Circuit Voltage: -55 dB (0 dB = 1 volt per microbar) Impedance: 500 ohms Dynamic Range: 110 dB Equivalent Noise Level: Less than 22 dB, A weighted Maximum SPL: 132 dB (1% THD, open circuit) Powering: Supply Voltage: 9 - 52 Vdc, positive pins 2 & 3 reverse polarity protected Current Required: Less than 5 mA over operating voltage range Phasing Positive pressure on diaphragm generates a positive voltage on pin ...