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Nor1203 1/2″ insert voltage preamplifier
Nor1203 1/2″ insert voltage preamplifier is designed for calibration purposes using the insert voltage technique.
The insert voltage technique is used for determine the open circuit voltage of a microphone cartridge.
It is delivered with an integral LEMO style connector.
Overview
The key components that determines the accuracy of a sound level meter is the measurement microphone and its associated preamplifier. The effectiveness of these components in converting the acoustic signal into an electrical analogue set the maximum accuracy that can be achieved by the ensuing signal processing. Norsonic have a carefully balanced range of measurement microphones to suite a range of applications that complement modern instrumentation yet maintain traditional values.
We offer a broad range of 1/2″ and 1/4″ microphone preamplifiers.
- Broad frequency response
- Low noise
- High input impedance
- Low output impedance for driving long microphones cable without any loss in performance.
- High dynamic range
Specifications
Frequency range: 2Hz to 200kHz ±0.2dB
Input impedance: 20 Gohms, 0.2pF
Output impedance: 55 ohms @ 1kHz, CS: 20pF
Noise, A-weighted, CS 20pF: <3µV
Noise linear, CS 20pF: <6µV
Gain, typical: -0.15dB
Temperature, operation: -40 to +60°C
Temperature, storage: -40 to +85°C
Humidity, operation and storage: 0 to 95% RH
Current consumption (120V or ±60V): 2.5 mA
Current consumption (28V or ±15V): 0.7 mA
Dimensions:
Length: 77.5mm
Diameter: 12.7mm
Weight: 33g
CE classification, EMC: EN 50081-1, EN 50082-1
CE classification, safety: EN 61010-1, 1993 portable equipment pollution category 2 Hz to 1MHz ±0.5dB
