NTi Audio XL2 Sound Level Meter - Manual (Page 132)

132
Audio Analyzer
1 Filter
Z-Weighting Frequency Z-weighting with flat frequen-
cy response from 20 Hz to 22 kHz. De-
fault measurement setting.
A-Weighting Frequency A-weighting according
IEC 61672 for low noise levels.
C-Weighting Frequency C-weighting according
IEC 61672 for high noise levels.
HP 100Hz Highpass 100 Hz, -200 dB/dec.,
maximally flat magnitude filter,
e.g. -60 dB @ 50 Hz
HP 400Hz Highpass 400 Hz, -120 dB/dec., maxi-
mally flat magnitude filter, attenuates
50/60Hz components of test signal
HP 19k Highpass 19 kHz; e.g., to measure a
20 kHz pilot tone level of a public address
system without disturbing the public.
22.4 - 22.4k Bandpass filter 22.4 Hz - 22.4 kHz (IEC
468-4)
2 Level RMS
Measures the absolute level of the input signal. The unit’s
dBu, dBV, V and dBSPL are selectable.
3 THD+N
Measures the total harmonic distortion and noise of the
input signal. The distortion measurement, expressed in dB,
linear or in %, is conducted within the bandwidth 10 Hz -
20 kHz.
4 Frequency in Hz
The XL2 automatically extracts and measures the frequen-
cy of the fundamental signal. The XL2 frequency counter
technology even reads the frequency correctly for heavily
distorted signals.
5 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 at pin 2 is
higher than at pin 3.
The signal is unbalanced. The level at pin 3 is
higher than at pin 2.