User manual

136
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, Volt V, dBSPL, Watt W and dBm are selectable.
The Watt and dBm measurement result is calculated based
on a user-defined Load.
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. This value is calculated as follows:
THD+N = (Distortion+Noise) / (Signal + Distortion+Noise)
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.