98 Bedrock SMxx operating manual © Bedrock Audio BV, 2019
99
B.4. Reference range and range adjustment
The reference range is the +20 dB range. Once a range is selected through the “settings”
module, no range adjustments take place during measurements and the SMxx acts as a sin-
gle range instrument. Adjustment of the display range within the modules themselves does
not have an impact on the measurement range, just on which range of values are displayed
in graphs on the display.
B.5. Reference range for linearity measurements
The linearity of the SMxx is to be evaluated in the range 30 - 120 dB.
B.6. Wind spheres
The wind spheres are not part of the standard configuration and need not be considered for
periodic testing. Wind sphere corrections are provided in Annex A for information purposes
only.
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