Catalog excerpts
Product Data Applications • Microphone arrays • Automotive • General purpose The Nor1207 is a low cost, general-purpose ICP®-preamplier for 1/2” working standard prepolarized condenser microphones, designed for the most demanding use. It features a new design technology that increase the dynamic range to a value normally featured by traditional powered preampliers only. It is the rst pattern evaluated ICP® preamplier on the market, ensuring a high quality of the measurement in every environmental condition as specied in the class 1 requirements given in IEC-61672. Nor1207 apply a male TNC-connector for connection to cable or instrument, while Nor1207/BNC comes with a BNC female connector.
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Technical specication (Data given with 3mA supply current) The preamplier has to be supplied by a constant current in the range 3 – 20 mA. The output voltage will be a xed DC (about 10 volt) plus the AC-coupled input voltage. Output AC-voltage swing is minimum +/-5 volt if not limited by the voltage for the current source. Dynamic range: > 120dB Input impedance: 20 Gohm, 2,5 pF (typical) for Nor1207/BNC 20 Gohm, 18 pF (typical) for Nor1207 Frequency response ± 0,1 dB: (10 Hz – 20 kHz) Typical attenuation with microphone Nor1228 (18pF) due to capacitive loading: 1 dB for Nor1207/BNC 6 dB for...
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