AVT MAGIC THipPro Lite, Configuration Manual

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Define the signal processing parameters on the
SIGNAL PROCESSING page.
▪
LINE SETTINGS:
▪
AUTOMATIC GAIN CONTROL: The AGC controls the
amplifier which processes the audio signal of the
caller. Enable the AGC to maintain a certain audio
level despite variations in the caller’s voice or
differences between callers. The AGC parameters
can be modified under AUTOMATIC GAIN CONTROL
SETTINGS (AGC) / EXPANDER.
The user can enable or disable the AGC for each call
individually by clicking on the level meter on the
main panel of the PC software.
▪ EXPANDER: There are expander filters for all
telephone channel inputs and outputs. The
expanders are always on. They lower the level of
quiet audio signals even more to reduce noise. The
threshold under AUTOMATIC GAIN CONTROL
SETTINGS (AGC) / EXPANDER is used for AGC and
the expander for received audio signals. The
threshold for transmitted audio signals is -52 dBFS.
▪
AUTOMATIC GAIN CONTROL SETTINGS (AGC) /
EXPANDER: Define the filter parameters for AGC
and expander.
▪
THRESHOLD: The AGC is only applied to audio
signals above this level. The expander is only
applied to audio signals below this level.
▪
LEVEL: Define the target level for the AGC. The AGC
tries to maintain this level for the audio signal from
the caller. By default the amplifier has a range of
32 dB. Which means it can lower the signal by 16 dB
and amplify the signal by 16 dB. If the target level is
set higher than -20 dBFS the range of 32 dB
remains but splits differently. The higher the target
level the more amplification is possible at the cost
of lowered possible attenuation.
▪
SPEED: Define how fast the AGC should adjust to
changes in the audio signal coming from the caller.
(SLOW, MEDIUM, FAST, VERY FAST)
Signal Processing (2)
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