PCB Test & Measurement Seite 50

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PCB PIEZOTRONICS INC 716 684 0001 Fax 716 685 3886 For Additional Specification Information Visit www pcb com 48 Externally Polarized 200V Precision Condenser Microphone Cartridges Model Number 2520 2540 2559 2541 2560 2570 2575 Diameter 1 4 inch 1 2 inch 1 2 inch 1 2 inch 1 2 inch 1 inch 1 inch Response Free Field Free Field Random Incidence Free Field Random Incidence Free Field Random Incidence Open Circuit Sensitivity 4 mV Pa 14 5 mV Pa 12 9 mV Pa 44 5 mV Pa 45 2 mV Pa 48 mV Pa 45 mV Pa Frequency Range 2 dB 4 to 80k Hz 4 to 40k Hz 4 to 25k Hz 3 15 to 20k Hz 2 6 to 10k Hz 2 6 to 20k Hz 2 6 to 8000 Hz Dynamic Range 3 Distortion Limit 1 164 dB 160 dB 160 dB 146 dB 146 dB 146 dB 146 dB Dynamic Range Cartridge Thermal Noise 1 30 dBA 20 dBA 160 dB 15 dBA 15 dBA 10 dBA 10 dBA Temperature Range 40 to 302 F 40 to 150 C 40 to 302 ºF 40 to 150 ºC 40 to 302 F 40 to 150 C 40 to 302 ºF 40 to 150 ºC 40 to 302 ºF 40 to 150 ºC 40 to 302 ºF 40 to 150 ºC 40 to 302 ºF 40 to 150 ºC Note 1 re 20 µPa Externally Polarized 200V Condenser Microphones Highlights Operates from 200V power Large assortment of sizes and models IEC Type 1 compliant models Interchangeable with existing competitive models Externally polarized microphones utilize a 200V power supply Original models were popular due to their low noise characteristics but technological advances over the years have allowed the standard 0V designs to meet or even exceed the low noise floor system specifications of the 200V units Externally polarized microphones have the capability of going to a higher 302 ºF 150 ºC temperature than its prepolarized 248 ºF 120 ºC counterpart However since these microphones require a preamplifier it is the preamplifer specification that is the limiting factor in the operating temperature capability and the system must be viewed in total Externally polarized microphones require a separate 200V power supply and 7 pin cabling which tends to make the system cost per channel much greater even though the microphone itself is cost effective when compared to the prepolarized models For additional product specifications visit www larsondavis com 3 T Mcatalog 2011 Seite 33 48 A4 F G500 21 04 11 09 28 Seite 48