NTi Audio XL2 Sound Level Meter - Manual (Page 10)

10
Overview
1/12 Oct + Tol: • The limit button lights up green for results
within tolerance and red for out of tolerance results.
5 Pause
Pauses the current measurement. Press the pause button
or the start/stop button to continue the measure-
ment. The data logging is continued in the function SLMe-
ter/RTA during the pause period and listed in the log file.
6 Start/Stop
Starts and stops a measurement.
7 Enter
Confirms a selection.
8 Rotary Wheel
Selects the required measurement function or the individu-
al measurement parameter.
9 ESC
Terminates an entry, returns to the top menu level or closes
an open window.
Hold the speaker button • down and adjust the level
of the speaker and headphone outputs with the rotary
wheel . Digital gain control prevents gain increases be-
yond a level that will cause signal clipping. The maximum
gain setting depends on the connected input signal.
The headphone output provides a linear output signal
•
using the SLMeter function (for input levels of approx.
-30 dBu and higher, which equals at M2230: 85 dBA,
M2211: 92 dBA utilizing a pink noise test signal).
3 Power & Backlight
The power button switches the instrument on. The XL2 is
immediately ready for operation. Holding down the power
button
for one second switches the XL2 off. Additionally,
a brief press of the power button toggles the backlight
during operation.
4 Limit
SLMeter: • The limit button lights up green, yellow or red
according to the settings in the Limit page. Press the
limit button
to access the Limit page. For more details
visit the chapter Sound Level Meter: Limits.
FFT + Tol:
• The limit button lights up green for results
within tolerance and red for out-of-tolerance results.
Polarity:
• The limit button lights up green at positive polar-
ity and red at negative polarity.