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 increases 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.
(Data given with 3mA supply current)
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|
Typical equivalent noise (level with a microphone with sensitivity 50mV/Pa and 18pF capacitance re. 20 µPa, e.g. Nor1228): 2 µV A-weighted (12 dB, Max 15 dB); 2,2 µV C-weighted (13 dB).
|Max length of cable (100pF/m) with a microphone with sensitivity 50mV/Pa and 18pF capacitance (E.g. Nor1228):||Below 137 dB (re. 20 µPa): 30 m|
Below 130 dB: 100 m
Below 120 dB (re. 20 µPa): 300 m
|Connector type:||Two versions available. Nor1207 with TNC connector and Nor1207/BNC with BNC jack.|
ICP® is a registred trademark of PCB Piezotronics
|No extra heating available|