AVT MAGIC TH6 POTS, Руководство по аппаратному и программному обеспечению

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PAGE 49
O p e r a t i o n v i a W i n d o w s P C S o f t w a r e
FIG. 29 CONFIGURATION AGC
Via the button
Set AGC on/off for all lines
you can switch on respectively
switch off the
AGC
for all lines.
• An
Expander
tones down the caller signal automatically, if its level falls
below a certain threshold value. The aim is to completely filter out back-
ground noises of callers who are not currently speaking.
To activate the
Expander
select the desired line with your mouse. To
switch off the
Expander
select
Off
. To switch it on select
On
.
Via the button
Set Expander on/off for all lines
you can switch on respec-
tively switch off the
Expander
for all lines.
Automatic Gain Control Settings (AGC)/Expander
The correct functioning of the
AGC
can be optimised via several parameters.
•
Threshold
: The
AGC
does not start before the signal exceeds the threshold
value set here. The default setting is
-45 dBFs
.
•
Level
: The level set here corresponds to the average desired level. Please
consider sufficient head room. The default setting is
-24 dBFs
.
•
Speed
: Depending on the desired speed of the level adjustment (
Slow,
Medium
or
Fast
) you can adjust the setting of the AGC speed. The faster
the AGC must work the more noticeable are the inconsistencies. If the se-
lected speed is too slow, the caller signal is too low or too loud on average.
The default setting is
Medium
.
• With the use of the key
Default Settings
the AGC will be switched off and
the
Expander
will be activated.
Volume Control
Under
Volume Control
you can select the
Default Value
for the volume con-
trol within the range of
-16 ... +16 dB
.
Voice Disguise
With the Voice Disguise dropdown lists it is possible to adjust the style of the
Voice Disguise funtion. You can choose if the caller voice is pitched up or
pitched down and set the
Ratio
from
1 (low)
to
4 (high)
. Voice Disguise can
be activated under
Operation Settings
→
Mode & Audio Line
(see CHAP-
TER 5.6.4.1.1, Page 44).