Chapter 3 Measurement
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3.9.2 Setting filter
This section describes the filter setting in the Audio Analysis function
menu.
HPF
■
Summary
Limits the bandwidth by High Pass Filter against AF input signal.
■
Options
Off Does not use High Pass Filter.
20 Hz Uses High Pass Filter with a pass band of 20 Hz.
50 Hz Uses High Pass Filter with a pass band of 50 Hz.
100 Hz Uses High Pass Filter with a pass band of 100
Hz.
300 Hz Uses High Pass Filter with a pass band of 300
Hz.
400 Hz Uses High Pass Filter with a pass band of 400
Hz.
30 kHz Uses High Pass Filter with a pass band of 30
kHz.
LPF
■
Summary
Limits the bandwidth by Low Pass Filter against AF input signal.
■
Options
Off Does not use Low Pass Filter.
3 kHz Uses Low Pass Filter with a pass band of 3 kHz.
15 kHz Uses Low Pass Filter with a pass band of 15 kHz.
20 kHz Uses Low Pass Filter with a pass band of 20 kHz.
30 kHz Uses Low Pass Filter with a pass band of 30 kHz.
50 kHz Uses Low Pass Filter with a pass band of 50 kHz.
Weighting
■
Summary
Applies weighting to AF input signal.
■
Options
Off Does not use Band Pass Filter.
CCITT Uses Band Pass Filter defined in ITU-T
P.53/O.41.
C-Message Uses Band Pass Filter defined in C-Message.
CCIR-468 Uses weighing defined in CCIR-468.
CCIR-ARM Uses weighing defined in CCIR-ARM.
A-Weighting Uses A-weighting defined in IEC 61672.