Solidyne 462dsp, User Manual

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Page 14
SOLIDYNE 462
dsp - broadcast digital processor
Once into main menu; turn the JOG until select
the desired option. The selected option is marked
by
a little arrow
that appears
below the icons
.
Touch briefly the JOG to confirm the selection.
WARNING
Remember that being in the main screen, turning the
JOG or touching it briefly, you accede to the mode
‘program selection’. In this mode; turning the JOG you
explore the 462’s programs. In order to leave the
‘programs selection’ mode, press and hold the JOG. In
order to accede to the main menu press and hold
again.
If being in the main menu or any settings screen
changes not occur during 10 minutes, the unit returns
to the main screen, discarding the changes.
3.2.1 INPUT SETUP
a)
Here you define the
audio level
and
type of
input
. The operation on this screen follows the
concept of the previous ones: to select an option
(“Input selection” or “Input level”) turn the JOG and
touch briefly to confirm. Now turn the JOG again
to change the value of the chosen option. Touch
briefly to confirm.
Selecting this option the following screen will
appear:
INPUT SELECTION
Analog:
Select this option when the processor
is connected ONLY through the analogical input.
Digital only:
Choose this option when the unit
is connected ONLY through AES/3. Also the
analogical inputs can be connected, as back up,
but they will be used only in case that the carrier
of signal AES/3 interrupts. In this case, the
equipment exchanges automatically to the
analogical inputs, being in that mode until the
digital signal is reestablished.
Auto Search:
(default) It uses the AES/3 digital
inputs in case of finding a source of digital signal.
Otherwise, uses the analogical inputs. In case of
finding only silence or a total lost of digital AES/3,
the unit switches to the analogical inputs. This
type of faults in signal AES/3 is characteristic
when “a digital data link falls”. As signal AES/3 is
regenerated in the receiver, the digital streaming
follows present, but without content of audio
(channels muted).
Reestablishing the signal in Auto Search
mode:
After losing AES/3, or in absence AES
signal, or absence of audio in this digital signal,
the equipment switches automatically to the
analogical mode. The reestablishment to the
digital mode happens in immediately in case
signal AES/3 is had completely lost. Since when
recognizing a valued digital carrier, the processor
quickly returns to use the digital audio like source
of incoming signal. In case the digital signal exists,
but the same one contains silence, the processor
operates as follows: At intervals of 5 minutes the
processor interrupts briefly (1 sec) the audio on
the left channel, connecting in its place the digital
signal of the left channel; verifying soon if the
digital signal were reestablished. If it continues in
absolute silence, then it reestablishes the
analogical signal. This process is repeated time
and time again until as returns signal AES/3.
When the digital audio reappears, the processor
returns to digital mode.
While the digital signal remains absent, the audio
on the left channel is briefly muted at intervals of 5
minutes, to alarm to the engineers of the radio
(and to the operators) that the processor is
working with the analogical backup inputs. This
has been intentionally designing in this way, since
otherwise; an accurate confirmation does not exist
on problems in the signal AES/3.
A. INPUT LEVEL
Define the nominal level of the analogical input
signal. So that the AGC (automatic gain control)
operates correctly, is very important to fit this level
correctly.
This value must agree with the
nominal output
level of your console
(in the case of Solidyne
consoles this level is + 4 dBm).
NOTE: If you unknown the output level of your console, put the
console’s level at 0 VU peak and reads the level in the
462dsp’s input VU-meters.
With the adequate input level, the AGC works
around 10 to 15 dB of gain reduction. This can be