Solidyne 2600 serie, Руководство пользователя

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depends on the audio quality of the telephone
line (all communications don’t transmit the same
bandwidth) and the telephone or microphone
used at the other end. Obviously, same results
are not obtained using the small microphone of a
cellular telephone or a microphone of good quality
with a portable console. at least quality has the
transmission (smaller bandwidth) smaller will be
the action of VQR processing.
Make sure to listen to the processing in the main
monitors of the control room, to avoid an exces-
sive reinforcement of lows in the processed sig-
nal; that can take place if you are monitoring the
communication using small headphones or loud-
speakers of bad quality.
Hi band
It controls the level of high frequencies added to
the original audio coming from the telephone line.
With the fader closed the high processing deacti-
vates.
The action of this control is much more critical
that the Low Band , since an excess of highs pro-
cessing will generate an “artificial” sound; and in
extreme case “crashed high” sound can take
place, that will be annoying to the listener.
On the other hand, consider that an A.M. radio
can require more emphasis in high frequency than
a FM; to obtain a well-known improvement on the
air; therefore the control Hi Band
has an ample
rank of action .
The reconstruction level -or amount of highs
added to the signal- depends on the quality of the
transmission. This stage will be affected, mainly, if
the line has much background noise.
REMEMBER

The optimal level of work is obtained when the indicator
MID BAND lights with the signal peaks. Lower audio
levels can affect the behavior of the VQR processing.
NOISE Control (expander)
This control is used to reduce the background
noise present in the phone line. It acts only dur-
ing the
silences in the conversation, attenuating
the level of the signal to suppress the noise.
This is quick action gate reason why its effect is
imperceptible with normal levels of noise, not af-
fecting the word.
The NOISE fader acts changing the threshold
of the expander/gate. When de background
noise is under this threshold the expander/gate
works attenuating the noise.
Closing the fader the expander/gate is turned
off. When opening the fader
increases the
threshold , that is to say, the signal level below
which the expander/gate goes off. The action of
the expander/gate is showed in the display by
the NOISE CONTROL indicator.
How use this control
Increase the threshold raising the NOISE fader
until eliminating the background noise. An insuf-
ficient level will do that the noise remains, al-
though reduced. An excessive level will cause
that the audio appears “intermittent”.
Next some important tips to take in mind when
use this control:
•
If the background noise in the communication
is very high, will be always over the maximum
threshold (fader at top) with which the ex-
pander/gate will not work correctly.
•
Consider that the expander/gate releases
whenever the audio signal is below the
threshold. If the background noise is very vari-
able in level (noise from a street, for exam-
ple), it agrees not to use the NOISE CON-
TROL to avoid that during the pauses it acti-
vates and deactivates generating an intermit-
tent background sound. In these cases it is
preferred to leave the ambient noise.
•
Also can happen that the background noise is
very notorious (a strong humming or buzz)
and although the gate can attenuate it during
the pauses, the effect “appearance” and “dis-
appearance” of the noise is more annoying
than the own noise, due to a psycho-acoustic
phenomenon according to which the ear “is
accustomed” to the floor of constant noise
when concentrating the attention in the word.
According to these advice, the good criterion of
the operator will determine when it will make
use of the noise gate and in which cases it will
prefer not to use it.
3.9 Remote control
Models with Ethernet controller (option /VI) can be
managed remotely via LAN, using any web
browser on any operating system.
The console connects to a LAN from the RJ45 con-
nector labeled "IP Control", located at rear panel of
Master 2608. This connection uses a standard Eth-
ernet cable. By default the console is set to work
with DHCP. When the console connects to a
router/switch, it will assign an IP address.
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