NTi Audio XL2 Sound Level Meter - Manual (Page 88)

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Polarity
4 Balance Indicator
Indication of the audio signal balance between pin 2 and 3
on the XLR input for input signals > -34 dBu.
The input signal is balanced.
The signal is unbalanced. The level of pin 2 is
higher than pin 3.
The signal is unbalanced. The level of pin 3 is
higher than pin 2.
5 Relative Level Indicator
The grey area shows the measured signal energy within
the individual frequency bands. The bands with the biggest
energy have the most effect on the actual displayed POSI-
TIVE / NEGATIVE polarity result.
6 Polarity Indication
+ Polarity of frequency band is positive. The polarity re-
sult is in the upper display area; the + area.
- Polarity of frequency band is negative. The polarity
result is in the lower display area; the - area.
7 X-Axis
Seven octave bands with center frequencies from
125 Hz to 8 kHz. SUB displays the polarity of Sub-woofers;
frequency range < 100 Hz.
8 Negative Polarity Area
Measurement results area with negative polarity (-). The
black line in the middle of relative level indicator
5 displays
the measured polarity of the individual frequency band. The
dashed line indicates the lower limit of the measurement
result area.
9 Uncertain Polarity Area ???
Polarity results for frequency bands in this area are uncer-
tain. Therefore the polarity result ??? is displayed.
10 Positive Polarity Area
Measurement results area with positive polarity (+). The
black line in the middle of relative level indicator
5 displays
the measured polarity of the individual frequency band. The
dashed line indicates the upper limit of the measurement
result area.