Solidyne 462dsp, User Manual

Page: 6 / 38

Page 6 broadcast digital processor -
SOLIDYNE 462
dsp
1.2 Brief diagram for gene ral connect ions
1.
If your computer does not have
serial port; you can use a
RS232 to
USB
adapter to connect the 462dsp
on a USB port.
In units with option RDS, you need to
connect a computer to the processor
for
RDS programming. This
connection can be not permanent (in
case that a fixed text is transmitted; it
is stored into RDS memory).
2.
When the processor connects to
the console using the digital inputs,
it’s convenient to make the analogical
connection too. In case of fault in the
digital signal, 462dsp changes to the
analogical inputs automatically.
3.
In this example a RF connection
was used to transport the MPX signal
from the processor to the transmitter,
which assumes installed in a build far
from the studies.
In other configurations, the processor
locates in the transmitting plant and a
digital link is used to send the audio
(multiple sends can be used for
backup).
In this case, the remote control of
462dsp can be implemented through
a data channel of the link that allows
sending RS-232 data.
1.3 Understanding the main screen
Next you will see an overview on the 462dsp main
screen. Later each processing stages and its
settings screens are fully analyzed.
When the unit starts up; a boot screen appears
showing the current version of the operating
system. Once started, the unit presents the main
screen, which is described briefly at next as
introduction to the 462dsp graphical environment.
The progressive bars show the action of several
processor stages. The name of the current
program and state of inputs and outputs also
appears on this screen. From left to right you find:
The
input VU meters
(L & R). Below the vu-
meters an overload
“OVL”
warning can appear,
which turns on 8dB before the “digital clipping”
level (@ +18dBm). This warning turns off last 5
seconds if the “clipping” condition disappears.
The following bar shows the action of AGC
(Automatic Gain Control) that fits the input gain so
that the signal arrives at the processing stages
with constant level. In others words; if the signal
from the console arrives with low level (or very
high), the processor automatically compensate its
input gain so that the output level is uniform. This
is a gated AGC. If the input signal falls abruptly,