Norsonic - Model Nor1207 -1/2” Inch ICP Microphone Preamplifier
The Nor1207 is a low cost, general-purpose ICP-preamplifier 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 preamplifiers only. It is the first pattern evaluated ICP® preamplifier on the market, ensuring a high quality of the measurement in every environmental condition as specified 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.
The preamplifier has to be supplied by a constant current in the range 3 – 20 mA. The output voltage will be a fixed 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 and 6 dB for Nor1207
- No signal DC out: 10 ± 2 volt
- Output impedance: 35 ohm typical
- Length incl. microphone Nor1228: 96 mm
- Diameter: Nor1207/BNC: 14,5 mm
- Nor1207: 16 mm
- Weight incl. microphone Nor1228: 50 g
- Power consumption: 30 mW (dependent on supplied current)
- EMC classification: As for sound level meter Nor131
- Temperature for specified operation: -10°C to +50°C
- Temperature for storing: -30°C to +70°C
- Humidity for storing and operation: 0 – 90% RH
- Microphone heating: No extra heating available