Nor1207

(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

Maximum SPL with 50mV/Pa microphone:
Nor1207: 136dB
Nor1207/BNC:131dB

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

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 (re. 20 µPa): 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 registered trademark of PCB Piezotronics.

Frequency response for Nor1207:

Self noise:

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).