User Manual

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8.4.1.1 Instantaneous Record Mode
The Instantaneous Record Mode records the instantaneous values at a relatively high rate. The SLM
record rate is defined by the SLM Instant rate while the vibration record rate depends on the
frequency resolution (Input Setup, section 6.2.7, p.24). This record mode allows for more flexibility in
post-processing, but creates large files. It is recommended for short measurements that require high
temporal resolution like impulsive events. The average data can be recompiled from the
instantaneous data.
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
The following images show the data that are available when the Instantaneous Record Mode is
selected.
Only the Z weighting of the SLM spectrums can be recorded. The other frequency weightings can be
easily applied on the recorded spectrum in post-processing.