Studio Technologies Dante 5422A, Руководство пользователя

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Model 5422A User Guide Issue 3, December 2022
Studio Technologies, Inc. Page 37
Model 5422A
DANTE INTERCOM AUDIO ENGINE
Audio Switching (2-in/1-out)
The Audio Switching (2-in/1-out) operating mode allows two Dante receiver (input) audio signals to be routed to
one Dante transmitter (output) channel; only one input would be active at any one time. When the associated
high-frequency control signal is off (not active) audio input source 1 will be routed to the audio output; audio
input source 2 will not be routed to the audio output. When the associated control signal is on (active), audio
input 2 will be routed to the audio output; audio input 1 will not be routed to the audio output. The switching is
performed in a “click-free” manner, ensuring a “clean” transition as the source for the output channel transitions
between the two audio inputs.
Each Audio Switching (2-in/1-out) section uses four
Dante receiver (input) channels and four Dante trans-
mitter (output) channels. Two Dante receiver (input)
channel are used as the audio signal sources that
are routed to the Dante transmitter (output) channel.
An independent control signal, connected to a third
Dante receiver (input) channel, determines which
input is actively sent to the output. The control signal
arrives in the form of a high-frequency tone on its own
Dante receiver (input) audio channel. The state of
the control signal is based on a tone-operated (TOX)
function, technically identical to that utilized by the IFB
operating mode when selected for the TOX detection
mode. Each Audio Switching (2-in/1-out) section incor -
porates an independent tone-operated (TOX) detection
resource which provides a highly reliable means of
selecting the function’s on or off state. As expected, by
utilizing a Dante source the same signal can be used
to control one or more Audio Switching (2-in/1-out)
sections. The fourth Dante receiver (input) channel and
the second through fourth Dante transmitter (output)
channels associated with each Audio Switching (2-in/1-
out) section mode are not utilized.
The number of Audio Switching (2-in/1-out) sections
provided by a Model 5422A group depends on the
selected group size. A group size of 4 would provide
one Audio Switching (2-in/1-out) section. A group size
of 32 would provide eight independent Audio Switching
(2-in/1-out) sections. A Model 5422A-01 can provide
a maximum of eight Audio Switching (2-in/1-out) sec -
tions. A Model 5422A-02 can provide a maximum of 16.
The Audio Switching (2-in/1-out) section can be utilized
in a wide variety of audio switching functions. Each
section allows two Dante audio sources to be routed
to a single destination. As an example, this could be
useful for a broadcast application where two on-air
audio sources need to be routed, as needed, to a
broadcast center. A high-frequency audio signal would
be used to control which input is actively sent to the
output. A multi-channel source selector, whether for
monoaural, stereo, or 5.1, could easily be created. And
the same control signal would be used to activate all
the sections. In all cases, the switching action will be
“click free,” changing input routing without the addition
of any audio artifacts.