Soft dB Opus Suite SLM 4-Ch Module - Manual (Page 44)

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8.4.1.1 Instantaneous Record Mode
The Instantaneous Record Mode records instantaneous values at a rate defined by the Instant Rate.
This record mode allows for more flexibility in post-processing, but creates much larger files.
Use this record mode is recommended for taking short measurements that require high temporal
resolution like impulsive events.
Available Data
Data Type Measure Type Record Type Freq Weighting
Global
SPL Slow
Instantaneous A, C or Z
SPL Fast
SPL Impulse
SPL Peak
Leq and SEL
1/3 Octave Spectrum
SPL Slow
Instantaneous A, C and Z
SPL Fast
SPL Impulse
Leq and SEL
FFT Spectrum Leq and SEL Instantaneous A, C and Z
Note: Only Z weighting is recorded for spectrums as frequency weighting can be applied in post-
processing.
Post-Processing Options
The available operations for this record mode on post-processing are:
• Free event masking on the time-history
• Free redefinition of averaging periods
• Calculating stats on Global SPL and 1/3 Octave SPL Spectrum
8.4.1.2 Average Record Mode
The Average Record Mode records averaged values at a rate defined by the Leq Average Time. This
record creates smaller files, but allows for less flexibility in post-processing.
This record mode is recommended for taking long measurements that do not require high temporal
resolution such as environmental noise measurements.
Available data
Data Type Measure Type Record Type Freq Weighting