NTi Audio XL2 Sound Level Meter - Manual (Page 66)

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FFT Analysis + Tolerance
3 Y-Scale setting
Select the Y-Axis with the rotary wheel • and confirm
with enter .
Select the zoom factor between
• 20, 10, 5, 2.5 dB/div
and confirm with enter .
Scroll up and down with the rotary wheel
• to select the
Y-axis range.
Confirm with enter
• .
4 Measurement Result
Displays the actual and averaged measurement results.
5 Input Range
The XL2 Analyzer provides three input ranges to accom-
modate the wide range of input signals. The individual rang-
es are based on the microphone sensitivity setting in the
calibration menu of the XL2. For example at a sensitivity
S=20mV/Pa the input ranges are
Lower range: 10 - 110 dBSPL •
Middle range: 30 - 130 dBSPL •
Upper range: 50 - 150 dBSPL •
Select the lowest possible input range according to the
maximum level expected during the measurement; e.g., if
the sound pressure will be always below 110 dBSPL, then
select the lowest input range 10 - 110 dBSPL.
Manage
captures Allows to rename captures, clear re-
corded captures, save captures to SD-
Card for export from the XL2 or load
captures from SD-Card for import to
the XL2.
Start tolerance
mode Starts the tolerance mode for passed/
failed measurements comparing the
actual measurement results against a
tolerance band.
2 Measurement Result
Actual level result of the indicated frequency band. The cur-
sor readout displays the center frequency and the level of
the band indicated by the arrow.
Upper parameter displayed as line.
Lower parameter displayed as bargraph.