Studio Technologies 5205 Manuel utilisateur
Copyright © 2021 by Studio Technologies, Inc., all rights reserved
studio-tech.com
50280-0821, Issue 3
User Guide
Issue 3, August 2021
This User Guide is applicable for serial numbers
M5205-00151 and later with application firmware 2.2
Model 5205
Mic/Line to Dante® Interface
This page intentionally left blank.
Model 5205 User Guide Issue 3, August 2021
Studio Technologies, Inc. Page 3
Model 5205
Mic/Line to Dante Interface
Table of Contents
Revision History ........................................................... 4
Introduction ................................................................... 5
Getting Started ............................................................. 7
Connections ................................................................. 8
Dante Configuration ..................................................... 9
Operation ...................................................................... 9
Technical Notes ............................................................ 12
Specifications ............................................................... 16
Issue 3, August 2021 Model 5205 User Guide
Page 4 Studio Technologies, Inc.
Model 5205
Mic/Line to Dante Interface
Revision History
Issue 3, August 2021:
• Documents that the P48 status LED will no longer necessarily be blue in color.
Issue 2, August 2017:
• Documents that the unit now supports the STcontroller software application.
Issue 1, August 2015:
• Initial release.
Model 5205 User Guide Issue 3, August 2021
Studio Technologies, Inc. Page 5
Model 5205
Mic/Line to Dante Interface
Introduction
The Model 5205 Mic/Line to Dante In-
terface is a general-purpose audio de-
vice that supports applications utilizing
the Dante® Audio-over-Ethernet media
networking technology. Two analog mi-
crophone or line-level audio signals can
be connected to the Model 5205. They
are amplified as required and then con-
verted to digital audio channels on an
associated Dante connection. With the
inherent interoperability of Dante, the
Model 5205 can be used with other Studio
Technologies Dante-enabled products or
a multitude of devices from many other
manufacturers.
Microphone or line-level balanced analog
audio signals are connected using two
3-pin XLR connectors. The gain of the
associated preamplifier circuitry can be
selected for 0, 20, 30, 40, 50, or 60 dB.
P48 phantom power is provided to support
condenser microphones. LEDs display
the status of the gain and phantom power
functions. Multi-step LED meters provide
confirmation of the level of the two Dante
transmitter (output) audio channels.
The gain of the preamplifiers and on/off
status of the P48 phantom power sources
can be selected locally using the pushbut-
ton switches. They can also be monitored
and selected remotely using the STcon-
troller application.
The audio quality of the Model 5205’s
two audio channels is excellent, with low
distortion, low noise, and high headroom.
Careful circuit design and rugged com-
ponents ensure long, reliable operation.
A wide range of applications can be sup-
ported, including TV, radio, and streaming
broadcast events, corporate and govern-
ment AV installations, and post-production
facilities.
The Model 5205 requires an Ethernet
connection to supply both the data inter-
face as well as Power-over-Ethernet (PoE)
power. This requires an Ethernet connec-
tion from a PoE-enabled Ethernet switch.
Alternately, the Model 5205 can be pow-
ered by an external midspan PoE power
injector.
Applications
The Model 5205 is perfect for use in
conjunction with a variety of fixed and por-
table audio applications where one or two
analog audio signals need to join a Dante
“network.” The unit’s high-performance
audio circuitry allows virtually any source
Figure 1. Model 5205 Mic/Line to Dante Interface front and rear views
Issue 3, August 2021 Model 5205 User Guide
Page 6 Studio Technologies, Inc.
Model 5205
Mic/Line to Dante Interface
to be handled correctly. Essentially all
condenser, dynamic, or ribbon micro-
phones are compatible, as are most bal-
anced and unbalanced analog line-level
sources. The simple user controls, along
with an extensive set of status indicators,
help to ensure optimum performance is
maintained. With the unit’s compact size
and PoE powering, it’s simple to deploy
multiple units to integrate a distributed set
of sources into a Dante application. For
permanent applications there’s no reason
why a Model 5205 can’t reside within an
equipment rack or be mounted, using op-
tional brackets, underneath a table or on-
air studio set. In a conference room setting
the unit can be permanently connected
to a PoE-enabled Ethernet port, ready to
accept a signal source from various user-
provided devices.
Mic/Line Inputs
Two microphone or line-level analog
audio signals can be connected to the
Model 5205’s 3-pin female XLR connec-
tors. The preamplifier gain of each chan-
nel can be independently adjusted from
among six settings: 0 (line), 20, 30, 40,
50, or 60 dB. To support condenser micro-
phones P48 phantom power can be inde-
pendently selected as required for each
channel. LEDs are provided to display the
configuration of the gain and P48 phantom
power functions.
Six pushbutton switches, located on the
Model 5205’s front panel, allow local
selection of the preamplifier gain and P48
phantom power on/off status. The STcon-
troller application allows personal comput-
er users to both view and change the gain
of the preamplifiers and the on/off status of
the P48 phantom power sources.
Audio Quality
The Model 5205’s audio performance is
very good. The low-noise, wide dynamic-
range preamplifier circuitry ensures that
input audio quality is preserved. The outputs
of the preamplifiers are routed to high-per-
formance analog-to-digital conversion (ADC)
sections that support sampling rate of 44.1,
48, 88.2, and 96 kHz with a bit depth of 24.
A precision voltage-reference integrated
circuit supports the ADC circuitry in perform-
ing accurate signal conversion. The audio
signals, now in the digital domain, are con-
nected to the Dante interface section where
they are packetized and prepared for trans-
port over Ethernet. The P48 phantom power
source is extremely low noise, providing
microphone power while causing little signal
degradation. This is important for demand-
ing applications.
The mic/line inputs were carefully designed
for use in permanent, as well as portable
and field, applications. Extensive filtering
minimizes the chance that radio frequency
(RF) energy will interfere with the audio
input signals. Other components were in-
cluded to specifically address ESD (“static”)
situations, helping to ensure long-term
reliable operation.
Metering
Two 8-step LED meters provide a real-time
level indication of the two Dante transmitter
(output) channels. Scaled in dBFS (decibels
referenced to full scale digital) the meters
offer a direct view of the audio signal levels
as they are transported via Dante in the
digital domain. This is important as optimal
audio performance requires transporting
signals at their proper levels — without an
accurate indication this can be difficult to
achieve.
Model 5205 User Guide Issue 3, August 2021
Studio Technologies, Inc. Page 7
Model 5205
Mic/Line to Dante Interface
Ethernet Data and PoE
The Model 5205 connects to an Ethernet
data network using a standard 100 Mb/s
twisted-pair Ethernet interface. The physi-
cal interconnection is made by way of a
Neutrik® etherCON RJ45 connector. While
compatible with standard RJ45 plugs,
etherCON allows a ruggedized and locking
interconnection for harsh or high-reliability
environments. An LED displays the status
of the network connection.
The Model 5205’s operating power is
provided by way of the Ethernet interface
using the 802.3af Power-over-Ethernet
(PoE) standard. This allows fast and ef-
ficient interconnection with the associated
data network. To support PoE power man-
agement, the Model 5205’s PoE interface
reports to the power sourcing equipment
(PSE) that it’s a class 2 (low power) de-
vice. An LED is provided to indicate when
power is being supplied to the Model 5205.
If a PoE-enabled Ethernet port can’t be
provided by the associated Ethernet switch
a low-cost PoE midspan power injector
can be utilized.
Dante Audio-over-Ethernet
Audio data is sent from the Model 5205
using the Dante Audio-over-Ethernet
media networking technology. As a Dante-
compliant device, the Model 5205’s two
transmit audio channels can be assigned
to other devices using the Dante Control-
ler software application. The bit depth is
24 and sample rates of 44.1, 48, 88.2, and
96 kHz are supported. Two bi-color LEDs
provide an indication of the Dante connec-
tion status.
Future Capabilities and
Firmware Updating
The Model 5205 was designed so that
its capabilities and performance can be
enhanced in the future. A USB connector,
located on the unit’s back panel, allows the
application firmware (embedded software)
to be updated using a USB flash drive.
To implement the Dante interface the
Model 5205 uses Audinate’s Ultimo™
integrated circuit. The firmware in this
integrated circuit can be updated via the
Ethernet connection, helping to ensure that
its capabilities remain up to date.
Getting Started
What’s Included
Included in the shipping carton are a
Model 5205 Interface and a printed copy
of this guide. As a device that is Power-
over-Ethernet (PoE) powered, no external
power source is provided. Should a PoE
midspan power injector be required it must
be purchased separately.
Mounting Options
There is no provision for directly mounting
one or more Model 5205 units in an equip-
ment rack. However, the overall height of
the unit was carefully selected so that it
could be placed without interference on a
single space (1U) rack shelf. The Model
5205’s enclosure width allows up to four
units to be placed side-by-side on a 1U
shelf that’s mounted in a standard 19-inch
equipment rack. Hook-and-loop (“Velcro”)
tape can be used to secure the Model
5205 units to the shelf.
Issue 3, August 2021 Model 5205 User Guide
Page 8 Studio Technologies, Inc.
Model 5205
Mic/Line to Dante Interface
A set of mounting brackets is available to
allow a Model 5205 to be attached to the
underside of a desk, table, broadcast set,
or other flat surface. Contact Studio Tech-
nologies for details.
Connections
In this section signal interconnections
will be made using the connectors located
on the back panel of the Model 5205.
An Ethernet data connection with Power-
over-Ethernet (PoE) capability will be
made using either a standard RJ45 patch
cable or an etherCON protected RJ45
plug. Microphone or line-level signal
sources will be connected using two cable-
mounted 3-pin male XLR connectors.
Ethernet Connection
A 100BASE-TX Ethernet connection that
supports Power-over-Ethernet (PoE) is
required for Model 5205 operation. This
one connection will provide both the Ether-
net data interface and power for the Model
5205’s circuitry. A 10BASE-T connection is
not sufficient and a 1000BASE-T (“GigE”)
connection is not supported unless it can
automatically “fall back” to 100BASE-TX
operation. For PoE-supporting Ethernet
switch power management the Model
5205 will enumerate itself as a PoE class 2
device.
The Ethernet connection is made by way
of a Neutrik etherCON protected RJ45
connector that is located on the back panel
of the Model 5205. This allows connection
by way of a cable-mounted etherCON
plug or a standard RJ45 plug. The Model
5205’s Ethernet interface supports auto
MDI/MDI-X so that most cabling implemen-
tations will be correctly supported without
requiring a “cross-over” or “reversing”
cable.
Ethernet Port without PoE
As previously discussed in this guide, the
Model 5205 was designed such that the
Ethernet connection will provide both data
and Power-over-Ethernet (PoE) power.
There may be situations where the associ-
ated Ethernet switch does not provide
PoE power. In these cases an external
PoE midspan power injector can be used.
As long as the midspan power injector
is 802.3af-compatible it should function
correctly. Midspan units are available
from a variety of sources, including Studio
Technologies.
Mic/Line Inputs
The two mic/line inputs are intended for
connection with balanced microphone or
line-level analog audio signal sources.
Typically these sources will be associated
with professional audio equipment such
as dynamic, condenser, or ribbon micro-
phones, audio consoles, video storage and
playback systems, wireless microphone
receivers, and audio testing equipment.
The Model 5205 provides two 3-pin female
XLR connectors for interfacing analog au-
dio signals with the mic/line inputs. For bal-
anced signals pin 2 should be connected
to signal + (high) and pin 3 should be sig-
nal – (low). Pin 1 should be connected to
the shield of the interconnecting cable.
Unbalanced signals can also be connect-
ed. In most cases signal + (high) should
be connected to pin 2 and common/shield
should be connected to both pins 1 and 3
Model 5205 User Guide Issue 3, August 2021
Studio Technologies, Inc. Page 9
Model 5205
Mic/Line to Dante Interface
of the 3-pin male XLR mating connector.
If this connection arrangement results in
hum or noise it may be effective to try con-
necting signal + (high) to pin 2 and signal
common/shield only to pin 3.
Dante
Configuration
Several Model 5205’s Dante-related param-
eters can be configured. These configura-
tion settings will be stored in non-volatile
memory within the Model 5205’s circuitry.
Configuration will typically be done with the
Dante Controller software application which
is available for download free of charge at
audinate.com. Versions of Dante Controller
are available to support Windows® and
macOS® operating systems. The Model
5205 uses the Ultimo 2-input/2-output inte-
grated circuit to implement the Dante archi-
tecture. However, only the two transmitter
(output) channels are utilized. This dictates
which parameters can be configured and
what choices are available.
The two transmitter channels associated
with the Model 5205’s Dante interface
must be assigned to the desired receiver
channels. Within Dante Controller a “sub-
scription” is the term used for routing a
transmitter flow (a group of output chan-
nels) to a receiver flow (a group of input
channels). The number of transmitter flows
associated with an Ultimo integrated circuit
is limited to two. These can either be uni-
cast, multicast, or a combination of the two.
The Model 5205 will support audio sample
rates of 44.1, 48, 88.2, and 96 kHz with
a limited selection of pull-up/pull-down
values. The Model 5205 can serve as the
clock master for a Dante network but in
most cases it will be configured to “sync”
to another device.
The Model 5205 has a default Dante de-
vice name of ST-M5205 and a unique suf-
fix. The suffix identifies the specific Model
5205 that is being configured. The suffix’s
actual alpha and numeric characters relate
to the MAC address of the Ultimo integrat-
ed circuit. The two Dante transmitter chan-
nels have default names of Ch1 and Ch2.
Using Dante Controller the default device
name and channel names can be revised
as appropriate for the specific application.
Operation
At this point an Ethernet connection with
Power-over-Ethernet (PoE) capability
should have been made. Alternately, a
midspan power injector, in “series” with the
Ethernet connection, should have been put
into place. The Model 5205’s Dante con-
figuration settings should have been se-
lected using the Dante Controller software
application. At a minimum the two Dante
transmitter channels should have been
routed to receiver channels on an associ-
ated device. Analog signal sources should
have been connection to the two mic/line
inputs. Normal Model 5205 operation can
now begin.
Initial Operation
The Model 5205 will begin to function as
soon as a Power-over-Ethernet (PoE)
power source is connected. However, full
operation may take 20 seconds or longer
to begin. Upon initial power up the four
status LEDs located on the back panel will
begin to light. The USB LED on the back
panel and the P48, gain, and meter LEDs
Issue 3, August 2021 Model 5205 User Guide
Page 10 Studio Technologies, Inc.
Model 5205
Mic/Line to Dante Interface
on the front panel will light in a test se-
quence. After the LEDs complete their test
sequence one LED associated with the
level meter for channel 1 and one LED as-
sociated with the level meter for channel 2
will briefly light to indicate the version num-
ber of the unit’s application firmware (em-
bedded software). (Understanding how to
“read” the application firmware number will
be discussed in detail later in this guide.)
Once the entire sequence has completed
and the Dante connection has been estab-
lished full operation will begin.
Ethernet, PoE, and Dante
Status LEDs
Four status LEDs are located below the
etherCON connector on the Model 5205’s
back panel. The PoE LED will light green
to indicate that Power-over-Ethernet (PoE)
power associated with the connected Eth-
ernet signal is providing operating power
for the Model 5205. The LINK/ACT LED
will light green whenever an active connec-
tion to a 100 Mb/s Ethernet network has
been established. It will flash in response
to Ethernet data packet activity. The SYS
and SYNC LEDs display the operating sta-
tus of the Dante interface and associated
network. The SYS LED will light red upon
Model 5205 power up to indicate that the
Dante interface is not ready. After a short
interval it will light green to indicate that it
is ready to pass data with another Dante
device. The SYNC LED will light red when
the Model 5205 is not synchronized with
a Dante network. It will light solid green
when the Model 5205 is synchronized
with a Dante network and an external
clock source (timing reference) is being
received. It will slowly flash green when
the Model 5205 is part of a Dante network
and is serving as a clock master.
How to Identify a Specific
Model 5205
The Dante Controller software application
offers an identify command that can be
used to help locate a specific Model 5205.
When identify is selected for a specific
unit its meter LEDs will light in a unique
pattern. In addition, the SYS and SYNC
LEDs, located directly below the etherCON
connector on the back panel, will slowly
flash green. After a few seconds the LED
identification patterns will cease and nor-
mal Model 5205 level meter and Dante
status LED operation will again take place.
Level Meters
Two 8-step LED meters display the level
of the two Dante transmitter (output) chan-
nels. The meter steps are calibrated in
dBFS which indicates the number of dB
below the maximum possible digital
signal level. The maximum level, 0 dBFS,
is the digital audio reference level equal
to “full scale.” Full scale refers to the maxi-
mum level possible for a sine wave before
“digital clipping.” In typical applications
a signal with a nominal (normal) level of
–20 dBFS would be desirable. The five
meter steps that have a threshold of
–20 dBFS and less light with the color
green. The steps that light at –15 and
–10 dBFS are yellow in color and indicate
“hot” or above average signal levels. The
top step lights red in color when a signal
level is –5 dBFS or greater, indicating that
a potentially “clipped” (distorted due to
excessive level) signal is present.
Mic/Line Inputs
Two 3-pin female XLR connectors are
provided to interface analog audio signals
with the Model 5205’s mic/line inputs.
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