Soft dB Opus Suite SLM 4-Ch Module - Manual (Page 21)

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6.1 Input Selection
The Concerto allows the user to perform measurements on 1 to 4 inputs simultaneously.
Click on the / button to enable or disable specific inputs.
The number of enabled inputs has an effect on the 1/3 Octave Spectrum Frequency Span:
Number of Enabled Inputs
1/3 Octave Spectrum Frequency Span
1 to 2
6.3 Hz to 20 kHz
3 to 4
20 Hz to 20 kHz
6.2 Input Type
The available input types are AC and ICP sensors.
6.3 Dynamic Range
Dynamic range of each Input is around 94 dB. Input 1 and 2 have two range settings (low or high)
while inputs 3 and 4 have a single fixed range (low).
The limits of these ranges in dB depend on the sensor sensitivity. The table below provides examples
of the linear dynamic range for sensitivities of 40 and 50 mV/Pa.
Microphone Sensitivity 40 mV/Pa 50 mV/Pa
Low Range 27 to 121 dB(A) 25 to 119 dB(A)
High Range 39 to 132 dB(A) 37 to 130 dB(A)