Larson Davis 831C-FFT, Reference Manual

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SoundAdvisor Model 831C A-9
A.2.1 Model PRM831 Specifications
Table A.7
Frequency Response With respect to the response at 1 kHz with 1 Volt
rms input and 12 pF equivalent microphone, the
frequency response is as follows:
8 Hz to 16 Hz +0.1, -0.2 dB
16 Hz to 100 kHz +0.1, -0.1 dB
Lower -3 dB limit < 1.5 Hz
Attenuation 0.1 dB (typical)
Input Impedance 10 G Ohm // 0.16 pF
Output Impedance 50 Ohm
Maximum Output 28 Vpp 143 dB peak for microphones with 50 mV/
Pa sensitivity
Maximum Output Current 12 mA peak
DistortionHarmonics <-70 dBC with 8 Volt rms output at 1 kHz
Output Slew Rate 2 V/µS (typical)
Electronic Noise with 12 pF equivalent microphone
1.8 µV typical A-weighted (2.4 µV max)
4.3 µV typical Flat 20 Hz to 20 kHz (5.0 µV max)
Power Supply Voltage 15 to 36 Volts
DC Output Level ~1/2 power supply voltage
Power Supply Current 1.9 mA typical
Temperature Sensitivity <±0.05 dB from -40° to +80° C (14° to +176 °F)
Humidity Sensitivity <±0.05 dB from 0 to 90% RH, non-condensing at
50° C (122 °F)
Dimensions 12.7 mm diameter x 73 mm length (0.50" diameter
x 2.88" length)
Microphone Thread 11.7 mm - 60 UNS (0.4606 - 60 UNS)
Cable Driving Capability (<0.1 dB error) Model 831 SLM: 10 V rms output signal, full scale
• To 50 kHz with 10’ (3 m) cable
• To 25 kHz with 200’ (61 m) cable
• To 20 kHz with 328’ (100 m) cable
• To 18 kHz with 400’ (122 m) cable
• To 15 kHz with 500’ (152 m) cable
• To 6.3 kHz with 1000’ (305 m) cable
Model 831: 3 V rms signal, 10.5 dB below full scale
• To 80 kHz with 200’ (61 m) cable
• To 63 kHz with 328’ (100 m) cable
• To 50 kHz with 500’ (152 m) cable
To 10 kHz with 1000’ (305 m) cable