User guide

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CHAPTER 7
Using SIM 3
CAUTION: Offsets should be used cautiously. The offset values only affect
the displayed trace. Always keep track of the offsets to avoid any confusion
between the level displayed on the screen and the real level of the system.
7.7.6. Using Smoothing for Trace Comparison
Combined with Trace Offset, a 1/6 or 1/3 octave smoothing is useful when comparing
frequency response measurements. It is easier to overlay the traces when the closely spaced
frequency peaks and dips are smoothed, especially when determining the level differences
between traces. Some smoothing also makes it easier to place EQ curves over a frequency
trace using the Processor Inverted function.
CAUTION: Smoothing should be used cautiously because in many cases it
can mask problems, such as comb filtering and other narrow spectrum audio
phenomena. Go back and forth between the raw response and smoothed response
to see the effect of any changes on the actual frequency response.