Studio Dante 5402 User manual

50703-0821, Issue 4
Copyright © 2021 by Studio Technologies, Inc., all rights reserved
studio-tech.com
User Guide
Issue 4. August 2021
This User Guide is applicable for serial numbers
M5402-00151 and later with Main MCU Firmware 1.01 and later
and Dante Firmware version 1.2.0 and later
Model 5402
Dante® Leader Clock
with GNSS Synchronization

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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
Table of Contents
Revision History ...................................................................................................................... 4
Introduction ............................................................................................................................. 5
Installation ............................................................................................................................... 8
Dante Configuration ................................................................................................................12
Model 5402 Configuration .......................................................................................................14
Operation ................................................................................................................................33
Technical Notes .......................................................................................................................43
Specifications ..........................................................................................................................48
Appendix A–Compatible Sync Input Sources .........................................................................50
Appendix B–Network Configuration Examples .......................................................................51
Appendix C–Dante Controller Network Default Configuration Values .....................................54
Appendix D–Front-Panel Menu Structure ...............................................................................55
Appendix E–Model 5402 Default Configuration Values ..........................................................56
Appendix F–PTPv2 (IEEE® 1588-2008) Default Characteristics ...........................................57
Appendix G–Accessing the Unit when User Name and/or Password are Not Known ............58

Issue 4, August 2021 Model 5402 User Guide
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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
Revision History
Issue 4, August 2021:
• Documents change of Dante Controller default configuration setting. (Was Switched, changed to
Switched+Mgmt.).
Issue 3, August 2021:
• Revises format of document. Incorporates menu page screen captures in-line with text and removes related
appendix.
Issue 2, July 2021:
• Documents support for 176.4 and 192 kHz sample rates.
• Miscellaneous corrections and clarifications.
Issue 1, May 2021:
• Initial release.

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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
Introduction
The Model 5402 Dante Leader Clock with GNSS
Synchronization provides precise timing signals for
applications that utilize the Dante audio-over-IP (AoIP)
media networking technology. The unit implements a
high-performance IEEE® 1588 precision time protocol
(PTP) server, compatible with the requirements of
Dante and capable of simultaneously supporting the
timing needs of up to hundreds of Dante-compatible
devices. As expected, the Model 5402 provides the
PTPv1 (IEEE 1588-2002) compatibility that’s required
by Dante. In addition, the unit supports PTPv2 (IEEE
1588-2008) for AES67 applications. The unit includes
an integrated GNSS (satellite) receiver to allow a
precise timing reference to be acquired from the
four major constellations: GPS, Galileo, BeiDou, and
GLONASS. A multi-band GNSS antenna is included
with each Model 5402.
In addition, a sync input connection allows the Model
5402’s internal oscillator to be synchronized with a
variety of external timing and reference signals. A
word clock output provides a general-purpose timing
reference for use by external devices.
The Model 5402 integrates with the Dante Domain
Manager™ (DDM) software application. With DDM,
support for ST 2110 and AES67 can take place along-
side Dante audio. And with multiple Model 5402 units
all utilizing GNSS-based timing, studios across town
or even around the globe can share audio.
As an additional resource, the Model 5402 generates
eight sine wave audio tones on Dante transmitter
(output) channels. These can be useful during audio
and data network installation, maintenance, and
operation.
The Model 5402 is suitable for use in fixed and
mobile broadcast facilities, post-production studios,
Figure 1. Model 5402 Dante Leader Clock with GNSS Synchronization front and back views
commercial and educational theater environments,
and entertainment applications. Only power, a GNSS
antenna, and one, two, or three Ethernet network
connections are required for full operation. Using
Dante’s inherent capabilities two Model 5402 units
can serve in primary and backup Leader clock roles
for redundant operation.
The unit’s three Gigabit Ethernet (GigE) network
interfaces can be configured for use in a range of
network implementations. For high-reliability audio
applications two of the interfaces can support redun-
dant Dante operation while the third can be used for
accessing the management webpages.
An integrated web server allows fast and flexible
monitoring and configuration of the unit’s networking,
clocking, and Dante performance. Front-panel LED
indicators, an LCD display, and pushbutton switches
provide users with direct access to key operating
parameters.
The Model 5402 can be powered by 100-240 V,
50/60 Hz mains or a source of 12 volts DC. Both can
be simultaneously connected to provide redundant
operation. The lightweight enclosure mounts in one
space (1U) of a 19-inch equipment rack. Industry-
standard connectors are used for Ethernet, GNSS
antenna, DC power, and AC mains interconnections.
Updating the Model 5402’s operating software can be
easily performed using a USB flash drive.
Applications
Applications for the Model 5402 include broadcast
and post-production facilities, college and university
audio networks, arenas, stadiums, corporate installa-
tions, and virtually any application where substantial
numbers of Dante-compatible devices are utilized.
The Model 5402 will serve as a stable and consistent
Leader clock for the entire Dante “network.” And, as

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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
expected, the Model 5402 is compatible with all Dante
devices, no matter what their function or whom their
manufacturer. Applications that utilize devices com-
patible with AES67 will also benefit from the Model
5402’s resources. With its ability to “lock” to a satellite-
based time standard, multiple Model 5402 units can
be deployed literally “around the world” and maintain
synchronized PTP performance.
Why a Dedicated Dante Leader Clock?
With Dante ubiquitous in fixed and mobile facilities of
all sizes and types, the need arose for a cost-effective,
purpose-designed, dedicated Leader clock. While an
inherent strength of Dante networking is its carefully
implemented use of the IEEE 1588 standard to ensure
that all connected devices maintain a common timing
reference, the actual performance can vary widely
depending on the specific Dante devices in use and
the overall number of devices on a network. There
are many Dante-compatible devices that can provide
adequate basic performance as a Leader clock, but
with the Model 5402 networked audio systems get the
benefits of a high-performance Primary Leader Clock,
along with additional unique capabilities. The unit’s
feature set, along with the associated internal hard-
ware and software, was designed to provide optimum
performance, flexibility, and system integrity.
Timing Sources
The Model 5402 can provide excellent Leader clock
performance using a timing reference that is based
on signals provided by one or more GNSS (satellite)
constellations. This will ensure accuracy and stability
that exceeds the capability of standard Dante devices
by at least an order of magnitude. A configuration
choice is provided in a Model 5402 webpage to allow
a failover source of timing to be selected should a
valid GNSS signal become unavailable.
The Model 5402 will also provide strong Leader clock
performance using its temperature-stabilized internal
oscillator. While its standalone performance is excel-
lent, it can also be “locked” to a variety of external
signals for integration into facilities that already in-
clude a central or main timing reference. Compatible
signals include word clock, video reference, and 10
MHz. Word clock is a square wave signal that is often
used as a timing reference in audio-only facilities.
Video reference (“sync”) signals are found in most
broadcast and post-production facilities. The Model
5402 supports the most-common video format/rate
combinations including “black burst,” bi- and tri-level
HD, and several that are specifically intended for
4K applications. Industrial and commercial facilities
often utilize a source of 10 MHz sine wave as a tim-
ing reference.
GNSS Support
The Model 5402’s internal time base can be syn-
chronized to signals received from satellite-based
timing systems. Most often referred to as “GPS,”
satellite-based time and position data is more properly
identified as being received from a GNSS (Global
Navigation Satellite System). GPS (Global Position-
ing System) is just one set of satellites that can pro-
vide GNSS data. For maximum flexibility the Model
5402 contains an integral receiver that is compatible
with the four major worldwide GNSS constellations:
GPS (USA), Galileo (Europe), BeiDou (China), and
GLONASS (Russia). In addition, the unit allows aug-
mentation support for GPS as provided by QZSS
(Japan). Configuration choices allow which constel-
lations will be utilized by the Model 5402. This can
range from one to all four constellations. Using these
capabilities, the Model 5402 can achieve single-digit
nanosecond timing accuracy. Multiple, geographi-
cally disbursed sites (“network nodes”) can each use
a Model 5402 to easily achieve a coordinated timing
reference.
For general-purpose use the Model 5402’s GNSS
receiver will also report, by way of the front-panel
display and/or the management webpages, the cur-
rent date and time of day, as well as longitude and
latitude parameters. In addition, the number of satel-
lites currently “fixed” (locked) and the receiver input
power can also be observed.
Figure 2. An active, multi-band, high-precision
antenna is included with each Model 5402

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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
An active, multi-band, high-precision antenna is in-
cluded with each Model 5402. The compact antenna
is weather-resistant and includes a 5-meter (16.3 foot)
cable with attached SMA plug. The antenna can be
secured to the selected location using two machine
screws or affixed magnetically to a metallic surface.
Its performance is very good and many applications
will find this antenna to be sufficient. But it’s expected
that alternate, installer-provided antennas may also be
utilized to meet the specific needs of various applica-
tions. This may involve supporting longer interface
cables, using different mounting methods, or providing
more-advanced weather-resistant properties.
Word Clock Output
The Model 5402 generates a precise word clock
output signal that can be used as a timing reference
for related equipment. It’s specifically intended for
“locking” digital audio devices in applications that use
the Model 5402 to provide timing reference signals
for the associated Dante equipment. In this way, all
devices in an installation will share a common timing
reference.
The word clock output rate can be 44.1, 48, 88.2,
96, 176.4, or 192 kHz. The underlying timing source
for the word clock output is derived from the Model
5402’s main timing source. This will typically be one
or more of the supported GNSS constellations. The
main timing source is divided and processed by the
Model 5402’s logic circuitry to create the highly stable
word clock output. This ensures that the word clock
output is synchronized with the unit’s PTPv1 and
PTPv2 server functionality.
Audio Tone Generator
The Model 5402 generates eight sine wave audio
tones intended for general-purpose use. These audio
tones are provided by the Model 5402 in the form of
Dante transmitter (output) channels. They can be
connected, using the Dante Controller application, to
Dante receivers (inputs) on related equipment. The
flexibility of being able to interconnect signals (create
Dante “subscriptions”) between all Dante devices on
a network allows the audio tones to be used for a
variety of purposes. Configuration choices allow the
frequency and level of each sine wave tone to be
optimized for use in specific applications.
Leader Clock Support for Dante Networks
A core part of the technology underlying Dante audio-
over-IP networking ensures that all connected devices
follow a common timing reference. This is accom-
plished using the IEEE 1588-2002 (PTPv1) and 1588-
2008 (PTPv2) precision time protocols. Any connected
Dante device can be used as a Leader clock; there is
no requirement that a dedicated Leader clock device
be utilized to realize adequate functionality. However,
the actual performance can vary widely depending on
the specific Dante devices available and the overall
number of Dante devices on a network.
Many Dante devices utilize the 2- or 4-channel
Ultimo™ ULT or UXT integrated circuits to implement
Dante connectivity. While Ultimo devices will fully sup-
port Dante audio transport, they are not well suited to
serve as a Leader clock. Ultimo’s PTP performance
is limited and does not have the ability to synchro-
nize with an external timing reference. Other Dante
devices may use the Brooklyn II module or Broadway
integrated circuit to support Dante connectivity. In
some cases, these devices can provide good basic
performance as a Leader clock.
However, problems and limitations may arise when
these devices are called upon to perform “double
duty,” serving in both a primary function (such as
analog-to-Dante interfacing or audio signal process-
ing) as well as acting as a Leader clock. This is un-
derstandable as the main purpose of these devices
is to serve functions other than acting as a primary
synchronization reference. Specialized features, such
as allowing a GNSS-derived time base are rarely, if
ever, supported. PTP performance can degrade when
the computing power of a device is intended primarily
for handling and manipulating digital audio signals.
This can lead to the required PTP resources being
in short supply when the number of Dante devices
that need timing messages moves into the hundreds.
Also, firmware updates, cabling changes, and other
maintenance tasks typically associated with a general-
purpose Dante device would impact the Leader clock
functionality for an entire installation.
The Model 5402 was specifically designed to support
a Dante-based audio or video system’s Leader clock
requirement. By utilizing GNSS, multiple Model 5402
units can be installed at independent locations while

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sharing a common timing reference. The unit’s gen-
eration of audio tones and implementation of the word
clock output utilize hardware circuitry that is separate
from that associated with its PTP functionality. As
such, this secondary functionality will not interfere
with PTP operation. Unlike general-purpose Dante
devices, once mounted in an equipment rack and
the required interconnections made, the Model 5402
will perform its tasks without risk of interruption due
to conflicting resource demands.
Flexible Networking Capability
Using the Dante Controller application program, the
Model 5402’s three Ethernet ports can be selected to
operate in one of four modes: Switched, Redundant,
Switched+Mgmt, and Redundant+Mgmt. This should
allow virtually any desired networking implementation
to be easily achieved.
By using the Switched or Redundant network modes,
separate network connections will be maintained for
Dante audio and management purposes.
In the Switched mode a single Ethernet connection
to either of the Model 5402’s two Dante Ethernet
ports will provide Dante Leader clock functionality.
The remaining Dante Ethernet port will provide Dante
network “loop-through” capability and can be used to
interface with another piece of Ethernet-connected
equipment. The management Ethernet port will be
used to access the Model 5402’s monitoring and
configuration webpages.
In the Redundant mode two independent Ethernet
connections are made to the Model 5402’s two Dante
Ethernet ports, enabling Dante’s redundant network-
ing capability. Again, the management Ethernet port
will be used to access the Model 5402’s monitoring
and configuration webpages.
In the Switched+Mgmt mode a single Ethernet con-
nection is used for both Dante Leader clock function-
ality as well as providing access to the Model 5402’s
management webpages. The remaining Dante Ether-
net port will provide network “loop-through” capability
and can be used to interface with another piece of
Ethernet-connected equipment.
In the Redundant+Mgmt mode two independent Eth-
ernet connections can be made to the Model 5402’s
two Dante Ethernet ports. This will enable Leader
clock capability for redundant Dante applications.
Access to the Model 5402’s management webpages
will be made by way of the Ethernet connection made
to the Dante primary Ethernet port.
Operating Power
The Model 5402 allows an AC mains source of 100-
240 V, 50/60 Hz to be directly connected. It can also
be DC powered using a 10-18 volt source that is con-
nected via a broadcast-standard 4-pin XLR connector.
If both AC and DC power sources are connected the
unit will be powered by the AC mains supply. Only if
the AC mains source fails will appreciable power be
drawn from the DC source. This allows a source of
DC, typically an external power supply, to serve in a
backup capacity. With this arrangement normal opera-
tion can continue even if AC mains power is lost.
Future Capabilities
The Model 5402 was designed so that its capabilities
can be enhanced in the future. A USB receptacle,
located on the unit’s back panel, allows the three firm-
ware files (embedded software) to be updated using
a USB flash drive. The Model 5402’s Dante firmware
can be updated using one of the unit’s Ethernet con-
nections, helping to ensure that the Dante capabilities
remain up to date. All software files and configuration
parameters are stored in non-volatile memory.
Installation
In this section the Model 5402 will be mounted in one
space (1U) of an equipment rack. In most cases, a
GNSS (satellite) antenna will be connected. It’s also
possible that an synchronization source will be con-
nected to the sync input BNC jack. If needed, a con-
nection may be made to the word clock output BNC
jack on the back panel. One or more Ethernet data
connections will be made. AC mains and/or DC power
will be connected to the Model 5402.
The interface cable associated with the included
GNSS antenna will be connected to the SMA jack on
the back panel of the Model 5402. Using a coaxial
cable terminated with a BNC plug, an external source
of synchronization may be connected to the sync input
BNC jack. A word clock output is provided by way of a
BNC jack and may be utilized by one or more pieces
of equipment. Up to three Ethernet data connections
will be made to the Model 5402 using standard RJ45
patch cables.

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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
AC mains power can be connected to the Model 5402
by means of a detachable cord that is compatible with
the unit’s 3-pin IEC 320 C14 inlet connector. Some
applications may warrant connection to a source of
nominal 12 volts DC which can be made by way of
a 4-pin XLR connector. A DC source can be used to
power the Model 5402 as well as serving as a backup
power source should AC mains not be present.
What’s Included
The shipping carton contains a Model 5402 Dante
Leader Clock, a GNSS antenna, and instructions on
how to obtain an electronic copy of this guide. Also
included in the shipping carton is a North-American-
standard AC mains cord. For destinations outside of
North America the local reseller or distributor should
provide an appropriate AC mains cord.
Mounting the Model 5402
The Model 5402 Dante Leader Clock requires one
space (1U) in a standard 19-inch (48.3 cm) equipment
rack. Secure the unit into the designated equipment
rack using two mounting screws per side. As the
Model 5402 does not contain a fan or other noise-
producing source it can be located within a room or
other structure where audio monitoring is going to
take place. But the priority when selecting a location
is to ensure that the cable associated with the GNSS
antenna can reach the SMA jack on the Model 5402’s
back panel. In addition, some or all of the connections
involving the sync input BNC jack, the word clock
output BNC jack, the Ethernet interface RJ45 jacks,
and the AC mains and/or DC power connectors may
be utilized.
The included GNSS antenna has an integral 5-meter
(16.3 foot) nominal cable terminated with an SMA
plug. It’s possible that an extension cable or alter-
nate antenna will be utilized which could expand
the mounting location choices. Twisted-pair (UTC)
Ethernet has a 100-meter (325-foot) interconnection
cable limitation. But that can be overcome by using
fiber-optic interconnections between the Model 5402
and the Ethernet switch or switches in the one or more
associated local-area-networks (LANs).
Connecting the GNSS Antenna
A multiband GNSS antenna is included with each
Model 5402. This is not just a common low-cost
single-band generic “GPS” antenna. This antenna,
Studio Technologies’ order code ANT-GNSS-01, is a
premium-quality device that will support reception of
all the satellite constellations that can be received by
the Model 5402. The antenna must be located where
an unobstructed “view” of the sky is available. The
top of the antenna should face up so as to be within
line-of-sight of overhead satellites. In most cases, an
outdoor location will be optimal but selecting an indoor
location that has minimal RF blockage can also be
effectively used. The antenna is suitable for outdoor
use and has an IP67 rating. This prevents dust from
entering the unit. It also provides moisture protection,
but the antenna should not be left submerged in water.
It’s possible that the antenna will work from inside
a building, such as next to a window or beneath a
skylight, but with reduced performance.
The antenna has an integral magnet such that it can
self-affix to a ferrous surface. It also has two mounting
holes, 68 millimeters apart center-to-center, that are
optimized for use with M4 or number 8 screws. The
antenna includes a 5-meter (16.3-foot) nominal length
of miniature RG174 (50 ohm) coaxial cable terminated
with an SMA plug. The plug must be securely affixed
to the SMA jack on the Model 5402’s back panel. The
cable must not be crushed and sharp bends must be
avoided. Do not secure the cable using cable ties
such that the cable’s mechanical characteristics are
changed.
It’s possible that the antenna’s cable can be extended
using a low-loss, 50-ohm nominal coaxial cable
jumper assembly. These are commercially available
from a variety of sources. The exact characteristics
of an extension cable are difficult to define, however
minimizing signal loss is critical. Testing the Model
5402 for proper GNSS reception with the antenna and
proposed cable extender in place is really the only
certain way of ensuring acceptable operation.
The Model 5402 can support the use of other mul-
tiband GNSS antennas. Studio Technologies has
tested several other antennas and they performed
very well. Refer to the Technical Notes section of this
guide for details.
Sync Input
An external synchronization source can be connected
to the Model 5402’s sync input BNC jack. Located on
the back panel, this input allows the Model 5402’s
internal timing to be “locked” to an external reference.

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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
In most cases, utilizing the sync input won’t be neces-
sary as the unit’s GNSS receiver will typically provide
an equal or better timing reference.
Signals that are compatible with the Model 5402’s
sync input include word clock, bi-level video, tri-level
video, and 10 MHz sine wave. A configuration setting
in the Sync Input webpage defines what type of signal
is going to be connected. Another setting defines if a
termination impedance is applied to the sync input.
Refer to the Specifications section of this guide for
the general characteristics required of acceptable
external sync signals.
A connected word clock signal must be a square
wave with a rate that matches the Dante sample rate
as defined in the Dante Controller application. The
rate can be 44.1, 48, 88.2, 96, 176.4, or 192 kHz. If
termination has been enabled for the sync input when
it has been configured for word clock an impedance
of 75 ohms will be applied.
A source of bi-level or tri-level video can also be con-
nected to the sync input. Circuitry within the Model
5402 will decode many of the common video rates and
formats, allowing them to serve as a timing reference.
Refer to Appendix A, located at the end of this guide,
for a list of compatible rates and formats. If the sync
input is configured for video and termination has been
enabled an impedance of 75 ohms will be applied.
A source of 10 MHz sine wave can be connected to
the Model 5402’s sync input. This type of signal is
commonly used as a timing reference in industrial
and instrumentation applications. An impedance of
50 ohms will be applied to the sync input if termina-
tion has been enabled and the source is selected for
10 MHz.
Word Clock Output
A word clock output signal is provided for use by other
devices that want to be “timed” from the Model 5402.
Available by way of a BNC jack located on the back
panel, the square wave output has a frequency that
matches the unit’s configured Dante sample rate.
Choices are 44.1, 48, 88.2, 96, 176.4, and 192 kHz.
The exact frequency of the word clock output is based
on the timing reference that has been selected for the
Model 5402. If, for example, GNSS was selected as
the unit’s timing reference, then the word clock output
would be “locked” to it.
The source impedance of the word clock signal is
75 ohms and its unterminated output level is 5 volts
peak-to-peak (Vpp). When externally terminated with
a 75 ohm load the word clock output level will drop
to 2.5 Vpp.
Ethernet Connections
The Model 5402 provides three Gigabit Ethernet
(GigE) ports for flexibility and compatibility with
many networking implementations. Two ports are
provided for interconnections with one or two local
area networks (LANs) associated with Dante audio-
over-IP networking schemes. They are labeled as
PRI (primary) and SEC (secondary). The third Ether-
net port, labeled MGMT, can be used to access the
Model 5402 management resources. An internal web
server function supports the Model 5402’s manage-
ment port’s webpages. These webpages are used for
configuration, monitoring, and maintenance of Model
5402 operation. Refer to Figure 3 for an overview of
the Model 5402’s three Ethernet ports and how they
can operate.
Using the Dante Controller application, the three
Ethernet ports can be configured to operate in one of
four modes: Switched, Redundant, Switched+Mgmt,
or Redundant+Mgmt. If configured for either the
Switched or Redundant mode the management web-
pages are accessed by way of the management Eth-
Dante Controller Network Model 5402 Ethernet Port
Switch Configuration Pri Sec Mgmt
Switched Dante Management
Redundant Dante Primary Dante Secondary Management
Switched+Mgmt Dante and Management Disabled
Redundant+Mgmt Dante Primary and Management Dante Secondary Disabled
Figure 3. Model 5402 Ethernet Port Configuration and Operation

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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
ernet port. When configured for the Switched+Mgmt
mode the management webpages are accessed by
way of either the primary or secondary Ethernet port.
When configured for the Redundant+Mgmt mode the
management webpages are accessed using an Ether-
net connection made to the primary Ethernet port.
By providing three Ethernet ports and four configura-
tion modes, the Model 5402 allows support for virtu-
ally all facilities, including those that utilize separate
networks for Dante audio transport and equipment
management. In this way, “production” networks that
support transport of audio signals by way of a single
LAN (Switched mode) or two LANs (Redundant mode)
can be separate from an engineering network that
is used by technical personnel for configuring and
maintaining a facility or “plant.”
Connections to the three Ethernet interfaces are made
by way of standard RJ45 jacks that are located on the
back of the Model 5402’s enclosure. The Ethernet
interfaces support auto MDI/MDI-X so that crossover
cables are not required. Refer to Appendix B, located
at the end of this guide, for examples of how the Model
5402’s three Ethernet interfaces might be utilized. It’s
difficult to conceive of a network environment that the
unit wouldn’t be able to effectively support.
Dante Port Connections
At least one 1000BASE-T (GigE) Ethernet connection
is required for Model 5402 Dante operation. It should
be connected to the primary RJ45 jack. A second
1000BASE-T (GigE) connection can be made to the
secondary RJ45 jack if Redundant Dante is desired.
For this functionality to be active the Model 5402’s
network configuration must be set for the Redundant
or Redundant+Mgmt mode within the Dante Control-
ler software application. While technically 100BASE-
TX (100 Mb/s) Ethernet can also be used for these
Dante connections, it is not optimal. Additionally, it’s
important to note that 10BASE-T (10 Mb/s) Ethernet
connections are not sufficient.
When configured in Dante Controller for the Switched
or Switched+Mgmt modes the Model 5402’s Dante
secondary Ethernet connection can also be used as
a “loop through” port such as would be provided by
an Ethernet switch. Using the Dante secondary port in
this manner for applications other than troubleshoot-
ing or “looping” to access the Model 5402’s manage-
ment port is not recommended. It will function reliably
but “daisy chaining” Ethernet signals can limit flexibility
and present a failure point; it’s optimal if each Dante
Ethernet interface connects directly to a separate port
on an Ethernet switch.
Management Port Connection
If required by the needs of an application, the manage-
ment webpages can be accessed using an Ethernet
signal connected to the Model 5402’s management
Ethernet port. This requires that the network mode in
Dante Controller be configured for Switched or Redun-
dant. It’s recommended that a 1000BASE-T (GigE)
connection be made but a 100BASE-TX (100 Mb/s)
connection is sufficient. (GigE will provide the best
performance and it’s assumed that all contemporary
applications will support it.)
Access to the Model 5402’s management web-
pages can also be obtained using the same network
connection or connections that are being used for
Dante audio. This requires that the network mode
in Dante Controller be configured for Switched+Mgmt
or Redundant+Mgmt. Appendix B provides example
of how these network scenarios can easily be
implemented.
Connecting Power
The Model 5402 requires a source of AC mains or
nominal 12 volts DC for operation. Either source can
be connected with the same result. Both can also be
simultaneously connected if a redundant (backup)
power scheme is desired.
Connecting AC Mains Power
The Model 5402 can operate directly from AC mains
power of 100 to 240 volts, 50/60 Hz, 5 watts maxi-
mum. As a “universal mains input” device there are no
switches to set or jumpers to install. A 3-pin IEC 320
C14 inlet connector on the back panel mates with a
detachable mains cord set.
All units are supplied from the factory with an
AC mains cord that has a North-American (NEMA
5-15L) standard plug on one end and an IEC 320 C13
connector on the other end. Units intended for use in
other destinations require that an appropriate mains
cord be obtained. The wire colors in the mains cord
should conform to the internationally recognized color
code and be terminated accordingly:

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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
Connection Wire Color
Neutral (N) Light Blue
Line (L) Brown
Earth/Ground (E) Green/Yellow
Because the Model 5402 does not contain a power
on/off switch it will begin operation as soon as AC
mains power is connected.
Safety Warning: The Model 5402 does not contain
an AC mains disconnect switch. As such, the AC
mains cord plug serves as the disconnection de-
vice. Safety considerations require that the plug
and associated inlet be easily accessible to allow
rapid disconnection of AC mains power should it
prove necessary.
Connecting DC Power
The Model 5402 can also operate from a source of
10 to 18 volts DC. The current required from a 12
volts DC source is 0.5 ampere (500 milliamperes)
maximum. A 4-pin male XLR connector, located on the
unit’s back panel, is used to connect the source of DC.
Prepare a mating connector (female) so that pin 1 is
DC– and pin 4 is DC+. Pins 2 and 3 are not used and
should remain unconnected. This connector type and
pinout have become a broadcast DC power standard
and should be familiar to many technical personnel.
Because the Model 5402 contains no power on/off
switch it will begin operation as soon as a DC power
source is connected.
As previously mentioned, both an AC mains source
and a DC source can be connected at the same time.
If this is the implementation then the AC mains source
will always power the Model 5402 with the DC source
serving as a “hot standby.” Only if the AC source fails
will the unit draw power from the DC source. This will
occur automatically with no interruption of Model 5402
operation. In this “standby” mode (when an AC mains
source is connected) the Model 5402 draws less than
110 microamperes (uA) from a 12 volts DC input.
Dante Configuration
For audio and timing to correctly pass from the
Model 5402 requires that several Dante-related para-
meters be configured. These configuration settings
are stored in non-volatile memory within the Model
5402’s Dante network interface circuitry. Configura-
tion will typically be done with the Dante Controller
software application, available for download free of
charge at audinate.com. Versions of Dante Controller
are available to support several operating systems.
Refer to Appendix C for a list of the Model 5402’s
Dante Controller default configuration.
The Model 5402’s Dante interface is compatible with
the Dante Domain Manager (DDM) software applica-
tion. Refer to DDM documentation, also available from
Audinate, for details on which Model 5402 and related
parameters may have to be configured.
Audio Routing
The Model 5402’s eight Dante transmitter (output)
channels can be assigned to the desired Dante re-
ceiver (input) channels on associated equipment. This
will route the eight channels associated with the tone
generator function. Within Dante Controller a “sub-
scription” is the term used for routing a transmitter flow
(a group of up to four output channels) to a receiver
flow (a group of up to four input channels).
The Model 5402 uses a Brooklyn II module to imple-
ment its Dante functionality. The number of transmitter
flows associated with this module is 32 and, as such,
typically no flow limitation should occur. These flows
can either be unicast, multicast, or a combination of
the two. Note, however, that when AES67 mode is
enabled in Dante Controller the Dante transmitter
(output) channels will only function in multicast; uni-
cast is not supported.
Unit and Channel Names
The Model 5402 has a default Dante device name of
ST-M5402- along with a unique suffix. The suffix iden-
tifies the specific Model 5402 that is being configured.
The suffix’s actual alpha and/or numeric characters
relate to the MAC address of the unit’s Brooklyn II
module. The eight Dante transmitter (output) channels
associated with the tone outputs have default names
of Tone 1 through Tone 8. Using Dante Controller,
the device and channel names can be revised as
appropriate for a specific application.
Device Configuration
The Model 5402 supports audio sample rates of 44.1,
48, 88.2, 96, 176.4, and 192 kHz with no pull-up/down
options available. The digital audio data is in the form
of 24-bit pulse-code modulation (PCM 24) samples.
Clocking- and latency-related parameters can be
adjusted if required in Dante Controller but the default
values are typically correct.

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Network Configuration – Dante
As has been covered previously in this guide, the
Model 5402 allows connection of one, two, or three
Ethernet signals using standard RJ45 jacks which
are located on the back panel. In many applications
two of the jacks will be used for Dante audio and the
third for connecting to a network designated for device
management purposes. It’s also possible to access
the Model 5402’s management webpages using the
Dante Ethernet ports. The Model 5402’s Dante ports
are labeled PRI and SEC indicating that they are typi-
cally used for the primary and secondary connections.
The third Ethernet port is labeled MGMT, indicating
that it is intended for use accessing the management
webpages. How these three Ethernet ports function
can be selected in the Network Config – Switch Con-
figuration section of Dante Controller. The choices
are Switched, Redundant, Switched+Mgmt, and
Redundant+Mgmt.
If Switched is selected then the Model 5402 can es-
tablish one Dante audio connection with an Ethernet
network. It doesn’t matter which RJ45 jack is utilized,
although for clarity this would typically be the primary
jack. The secondary RJ45 jack can be used to inter-
connect with another piece of networked equipment.
The management Ethernet port will be used to access
the management webpages.
If the Model 5402’s Dante network is configured for
Switched ensure that only one of the two Dante RJ45
jacks on the back panel is connected to the LAN as-
sociated with the Dante network. If both of the Model
5402’s Dante RJ45 jacks are routed to ports on the
same LAN this will typically “crash” the network!
(Although some of the latest/most-advanced Ethernet
switches will automatically detect and prevent such a
“network bridging” issue from occurring.)
If Switched+Mgmt is selected the same issues as
discussed in the previous two paragraphs would
again apply. The only difference is that the manage-
ment webpages would be accessed using the same
Dante Ethernet port that is being used to access the
Dante network. The management Ethernet port will
be disabled.
If Redundant is selected then Dante’s Redundant
networking capability will be enabled. In this case,
separate Ethernet LAN connections should be made
to the Dante primary and Dante secondary RJ45
jacks. Again, the Model 5402’s separate management
Ethernet port will be used to access the management
webpages.
If Redundant+Mgmt is selected in Dante Control-
ler then the network connection made to the Dante
primary Ethernet port will also be used to access the
management web-pages. The Model 5402’s separate
management port will be disabled.
IP Addresses
When a Model 5402 has been configured for either the
Switched or Switched+Mgmt network mode a single
Dante IP address will be associated with the network
connection that is made to either the Dante primary
or the Dante secondary RJ45 jack. If the network
configuration has been selected for Redundant or
Redundant+Mgmt then separate IP addresses and
related network parameters will be assigned to the
Dante primary and Dante secondary Ethernet ports.
No matter what network mode has been selected the
Model 5402 will always have a separate management
IP address.
Typically, the Model 5402’s Dante IP address or
addresses and related network parameters will be
determined automatically using DHCP or, if that’s not
available, the link-local network protocol. If desired,
the Dante Controller application does allow Dante
IP addresses and related network parameters to be
manually set to a fixed (static) configuration. While
this is a more-involved process than simply letting
DHCP or link-local “do their thing,” if fixed addressing
is necessary then this capability is available.
Note that if the Model 5402’s network configuration
has been set for Redundant or Redundant+Mgmt then
the Dante primary and Dante secondary IP addresses
and related parameters can be independently config-
ured. This allows both Dante interfaces to be config-
ured automatically, both interfaces to be configured
manually, or one interface to be configured automati-
cally and the other to be configured manually.
By default, the Model 5402’s management IP address
and related network parameters will be determined
automatically using DHCP or link-local. A configuration
option, accessible using the front-panel display and
associated buttons or the management webpages,
allows manual control of the management IP address,
subnet mask, and gateway address values.

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AES67 Configuration – AES67 Mode
Dante Controller allows a Model 5402 to be configured
for AES67 operation. This requires the AES67 mode to
be set for Enabled. As previously noted in this guide,
if AES67 mode is enabled then PTPv2 will be utilized
and the Dante transmitter (output) channels will use
multicast. The sample rate will be fixed at 48 kHz.
Preferred Clock Source
By the very nature of its intended application, the
Model 5402 will normally serve as the Leader Clock
for all Dante-enabled devices. The unit has the abil-
ity to communicate with the Dante network, selecting
itself as the Preferred Leader and causing the Enabled
Sync to External function to be enabled. The status
of these two parameters can be observed using the
Clock Status function in Dante Controller.
Settings accessible using the Model 5402’s man-
agement webpages allow extensive changes to the
clock configuration. These are provided for use when
troubleshooting or addressing special applications. In
most cases, the Model 5402’s default settings would
be appropriate and should be utilized.
Model 5402 Configuration
Many Model 5402 Dante Leader Clock operating pa-
rameters can be configured using the management
system’s webpages that are provided by way of one of
the unit’s Ethernet ports. The specific port utilized for
management will depend on the network configuration
that is selected using the Dante Controller application.
A standard web browser is all that is required to utilize
the menu webpages.
Several key network configuration parameters can
also be viewed and revised using the Model 5402’s
front-panel graphics display and associated pushbut-
ton switches. Refer to Appendix D for details on which
parameters can be revised in this manner.
Management IP Address
It’s easy to identify the Model 5402’s management
IP address by way of the front-panel display. If the
screen saver function is active, as it will be in most
situations, one of the six pages that will automatically
display will show the current management IP address.
As such, a user can simply observe the sequencing
menu pages and watch for the one that displays the
current management IP address. If it’s desired that the
current management IP address be continuously dis-
played then the Enter pushbutton switch on the front
panel should be pressed. This will stop the screen
saver function and cause the current management IP
address to display. It will also allow the various menu
pages to be accessed using the up, down, left, and
right pushbutton switches. Simultaneously pressing
the left and right arrow buttons will cause the screen
saver mode to begin again. The screen saver mode
will also automatically start two minutes after the last
press of any of the front-panel pushbutton switches.
How the management Ethernet port obtains its IP
address will depend on the management interface
configuration setting. The default method is automatic
so the Model 5402’s management port will first try to
obtain an IP address using DHCP. If that is not suc-
cessful an IP address will be assigned using the link-
local protocol. An address of 169.254.x.x will indicate
that an IPv4 address was established using link-local.
The Model 5402 may also have been configured to
use a manual (fixed or static) IP address. The front-
panel display and associated pushbuttons, or the
Model 5402’s management webpages, can be used
to review and/or make changes to the management
IP address and related parameters.
Accessing the Management Webpages
To access the Model 5402’s home webpage, type
the unit’s management IP address into a browser’s
search bar. (It’s possible that some browsers may
require including the text http:// followed by the IP
address.) Of course, the computer associated with
the browser must be on the same LAN and subnet
as the Model 5402.

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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
Home Menu
Once the Model 5402 menu system has been accessed the Home webpage will appear. It provides seven
display-only fields along with a link to the Login menu webpage. The fields are similar to those provided in the
Main menu configuration webpage. The current clock source field will display which timing source is actively
being utilized by the Model 5402. The GNSS status field will indicate the current condition of the Model 5402’s
GNSS (satellite) receiver. The Sync Input status field displays the current operating condition of the sync input
whose BNC jack is located on the unit’s back panel. The four Dante sync status fields will display the role that
the Model 5402 is actively playing as PTPv1 and PTPv2 timing resources for the devices connected to the
associated network or networks. Details about these fields are provided in the Main menu paragraphs found
later in this section.

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DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
Login Menu
From the Home webpage click on the Login tab to access the Login menu webpage. Entry of a valid user name
and password is required to access the additional configuration menus. The Model 5402 doesn’t incorporate
a sophisticated security implementation. The user name and password, as well as the underlying software, is
intended to keep “honest” people from making unauthorized changes to the configuration of the Model 5402.
It is not intended as a rigorous security system.
Should the applicable user name and/or password be misplaced, refer to the Technical Notes section and/or
Appendix G of this guide for a recovery method.
User Name: Enter the Model 5402’s user name into
this field. It is case sensitive. The default user name
is guest. If both the default user name and the default
password are active then the user name will display
in this field.
Password: Enter the Model 5402’s password into
this field. It is case sensitive. The default password is
guest. If both the default user name and the default
password are active then the password will display
in this field.
Log In Button: Click on the Log In button to submit
the entered user name and password. If the correct
entries have been made the Main menu webpage
will display. If an incorrect user name and/or pass-
word is entered then a login failed message will be
displayed.

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Main Menu
Once the correct user name and password have been submitted the Main menu webpage will be displayed.
This menu provides the ability to select three important operating parameters as well as displaying eight key
real-time conditions. In addition, the menu system allows direct access to other menu webpages.
Main Clock Source: This is a configurable field
with four choices: Internal, GNSS, Sync Input, and
Dante.
This setting determines which source will be the main
(normal) timing source that is used by the Model
5402’s circuitry as its own “Leader” timing reference.
This is the clock source that will be used by the Model
5402’s PTPv1 and PTPv2 servers that are critical to
the Model 5402’s support of related Dante devices.
When Internal is selected the Model 5402’s tempera-
ture-stabilized, high-performance crystal oscillator is
utilized. This will provide excellent timing accuracy
and consistent long-term performance. This source
is far superior to that provided by other standard
Dante devices. This is the correct choice if GNSS
is not going to be utilized or a high-quality external
reference signal is not going to be connected to the
sync input.
When GNSS is selected the timing reference that is
derived from the selected satellite constellation or
constellations will be used. This would be, assum-
ing that a solid GNSS “lock” can be established, the
most accurate and consistent timing source. It’s ex-
pected that GNSS will be selected in most Model 5402
applications.
When Sync Input is selected the Model 5402’s sync in-
put function will be utilized. Using a BNC jack, located
on the Model 5402’s back panel, an external source
of word clock, video reference, or 10 MHz sine wave
can be connected. Circuitry within the Model 5402 will
“lock” (synchronize) the internal timing signals to the
externally provided reference signal.
Selecting Dante will instruct the Model 5402 to use the
clock signal provided by its Dante interface circuitry
as its reference timing source. The Dante interface
circuitry will either use its internal crystal oscillator or
synchronize to another Dante device on the associ-
ated network. The actual clock source used by the
Model 5402’s Dante interface will depend on a setting
in the Dante Controller application.
The Model 5402 includes the choice of Dante as the
main clock source only for trouble-shooting or other
factory-directed activities. It’s not expected that this

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selection will ever be used during normal Model 5402
operation. By selecting Dante the excellent timing
performance that can be provided by the GNSS re-
ceiver, the sync input, or the internal oscillator would
not be utilized.
Failover Clock Source: This is a configurable field
with two choices: Internal and Dante.
This configuration choice selects which timing source
will be used should the Model 5402’s selected main
clock source become unavailable. Specifically, the
failover source will be used if a GNSS lock can’t be
obtained or a valid sync source is not connected to
the sync input. If Internal is selected then the unit’s
crystal oscillator will be utilized as the Leader clock
source should a valid GNSS or sync input signal not
be available. If Dante is selected then the failover
source will be the timing signal derived from the Model
5402’s Dante interface.
From a performance standpoint it’s preferable to
select Internal. This ensures that the best clock perfor-
mance can be obtained should the failover condition
be active. However, selecting Dante would allow an
interesting, albeit obscure, alerting feature to become
active. In the Dante Controller application, a device
such as the Model 5402 that has been selected as
the Preferred Leader with an external source allowed
will have an error condition occur if the Model 5402’s
Dante interface doesn’t detect an external reference
being applied. Losing the external reference is what
the Model 5402’s circuitry will do should failover be
activated and Dante selected as the failover source.
In this way, a Dante network user could be alerted
to a clocking issue should the Model 5402 lose its
important GNSS or external sync input source.
However, having an error condition reported in the
Dante Controller application is probably not terribly
important. The Dante SYNC LED, located on the
Model 5402’s front panel, will also offer a clear indica-
tion of a loss of a valid GNSS or external sync input
signal. This LED will typically slowly flash green when
the Model 5402 is functioning correctly as the Leader
clock for the Dante network. However, should the unit
be configured to use GNSS or an external sync input
signal and a valid one is not present, the SYNC LED
will flash orange to indicate this loss of lock and that
the failover source is in use. In addition, the display
will provide a text indication of this condition.
Force Preferred Leader: This is a configurable field
with two choices: Disabled and Enabled.
This function impacts how the Model 5402 will control
a Dante network’s selection of which device is going
to serve as the Leader clock. As the main reason for
the Model 5402’s existence is to serve as a Leader
clock, in most applications the unit should be serving
in that role. By forcing the Model 5402 to be a Pre-
ferred Leader clock it helps to ensure optimal Dante
network operation. By enabling this configuration,
users of the Dante Controller application will not be
able to accidentally disable the Model 5402 as a Pre-
ferred Leader. One can observe exactly what is meant
by the term Force Preferred Leader by unchecking the
Model 5402’s Preferred Leader check box in Dante
Controller. After a short interval the box will automati-
cally return to the enabled (checked) state.
How the Model 5402 handles forcing the Dante net-
work to be a Preferred Leader clock and, if applicable,
automatically supporting an external clock input is not
trivial. This ability to control Dante network opera-
tion is part of the unit’s “secret sauce.” If the Model
5402’s clock source is configured for Dante then the
Model 5402 will force off (uncheck) the Enable Sync
to External selection in Dante Controller. If the Model
5402’s main clock source is configured for Internal,
GNSS, or Sync Input then the Model 5402 will force
on (check) the Enable Sync to External configuration
in Dante Controller. This will apply as long as this spe-
cific Model 5402 is acting as Primary Leader, Leader,
or AES67 Leader.
Submit: A Submit button is located below the Force
Preferred Leader field. For any changes made to the
three configurable fields on the Main menu webpage
to be saved and acted upon the Submit button must
be pressed.
Current Clock Source: This is a display-only field
with choices of Internal, Internal (Failover Active),
GNSS, Sync Input, Dante, and Dante (Failover
Active).
The text Failover Active will display in red as a warn-
ing of an abnormal condition that warrants interven-
tion. The current clock source field can also display
--- which indicates a major hardware error and would
warrant contacting the factory.

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When Internal is displayed it indicates that the Model
5402’s internal temperature-stabilized oscillator is
being used as its timing reference. When Internal
(Failover Active) is displayed an abnormal condition is
occurring. In this case, the Model 5402 has been con-
figured to use either GNSS or external sync signal as
the main clock source but a valid one is not available;
it is using its internal temperature-stabilized oscillator
as the failover timing reference. If GNSS is displayed
then the Model 5402 is using a timing signal derived
from the selected satellite constellation(s). If Sync
Input is displayed this indicates that an external timing
reference signal is connected to the sync input BNC
jack on the Model 5402’s back panel and it is being
used as the main clock source. If Dante is displayed
this indicates that the Model 5402 is using a timing
reference derived from its Dante network interface.
This is not an invalid condition but would typically only
occur in a troubleshooting situation. If Dante (Failover
Active) is displayed an abnormal condition is occur-
ring. In this case, the Model 5402 is using a timing
reference derived from its Dante network interface.
However, this is only occurring because the config-
ured main clock source is not currently available.
GNSS Status: This display-only field will show Locked
(Active), Locked (Standby), Locking, Unlocked,
Antenna Disconnected, Antenna Error, and Idle. If
Locked (Active) is displayed this indicates that the
GNSS receiver is “locked” to one or more satellites
and the GNSS receiver is supplying the unit’s tim-
ing reference. If Locked (Standby) is displayed this
indicates that the GNSS receiver is “locked,” that the
GNSS receiver is capable of serving as the unit’s
timing reference, but that it is not currently serving as
the unit’s main clock source. Locking means that the
GNSS receiver is in the process of locking (or attempt-
ing to lock) to one or more of the possible satellite
constellations. Unlocked means that the GNSS is not
currently locked to a satellite constellation.
Antenna Disconnected would indicate that a GNSS
antenna is not currently connected. The Model 5402
detects this by the absence of DC current being
supplied by the circuitry associated with the GNSS
antenna SMA jack. Antenna Error would typically
indicate that too much DC current is being supplied
by the circuitry associated with the GNSS antenna
SMA jack. This could be indicative of a short circuit in
the antenna’s SMA plug or interconnecting cable. Idle
would indicate that the GNSS receiver is not selected
to be the main or failover clock source and is not cur-
rently locked to a satellite.
Sync Input Status: This is a display-only field with
choices of Locked (Active), Locked (Standby), Un-
locked, and Idle. As a warning of an abnormal condi-
tion the text Unlocked will display in the color red.
If Locked (Active) is displayed this indicates that a
valid signal is connected to the Model 5402’s sync
input and is serving as the unit’s timing reference. If
Locked (Standby) is displayed this indicates that a
valid signal is connected to the Model 5402’s sync
input and while it is capable of serving as the unit’s
main timing reference it is not currently serving as the
main clock source.
If Unlocked is displayed it can be the result of several
conditions. It can display if a signal is connected to the
Model 5402’s sync input but is not being recognized
as a valid timing reference. This can occur for mul-
tiple reasons. The most common would be due to a
configuration mismatch, such as if a video reference
is connected while the Model 5402’s sync input is con-
figured to support a word clock source. It might also
indicate that a non-supported word clock rate or an
incompatible video reference is connected. Unlocked
could also be displayed if no signal is connected to
the sync input or if a connected signal is incorrectly
terminated, e.g., no termination applied when one is
required or if two terminations (“a double termination”)
were present.
Idle will display if the sync input has not been selected
as the Model 5402’s main clock source and a valid
source has not been connected to the sync input. It
simply indicates that the sync input circuitry is not
actively receiving an external signal.
Primary Leader Clock: A display-only field will show
the MAC (media access control) address of the Dante
network’s currently active Primary Leader Clock.
Displayed to the right of the MAC address will be an
additional piece of information about what specific
device is associated with the displayed MAC address.
If the MAC address is associated with this specific
Model 5402 then the text will show (This Device). If
the MAC address is not for this specific Model 5402
the text will show (Other Device).

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A logical question to ask would be “so what is this
Other Device?” Unfortunately, the Model 5402’s
firmware does not have the ability to know more
about a specific Primary Leader Clock other than its
MAC address. It can only determine if the MAC ad-
dress matches this specific Model 5402 or not. If the
address doesn’t match then another device has to be
serving as the Primary Leader. The Dante Controller
may provide more detailed information about a Dante
network’s clocking. And network software or hardware
tools may allow a MAC address to be associated with
a specific device.
Note that the information provided in this field can be
a bit confusing, even to the writer of this guide. But for
a network maven it can be very useful when trouble-
shooting a complex network timing issue. Reviewing
several related issues to Primary Leader Clock can
be valuable. First of all, it’s important to note that the
reference to the word primary in “Primary Leader
Clock” has nothing to do with the primary and second-
ary Ethernet interfaces! In this context Primary Leader
Clock refers to the device that all other devices in a
Dante network will follow.
In most cases, a Model 5402 will serve as the Primary
Leader Clock. But there is no requirement that it must
play this role. For example, a Model 5402 can serve
as a Leader Clock while following the timing provided
by another device that’s serving as the Primary Leader
Clock. For another example, one Model 5402 could
serve as the Primary Leader Clock while several other
Model 5402 units serve as PTP boundary clocks.
These boundary clocks would, by way of a unicast
PTP message, synchronize with the Primary Leader
Clock. The boundary clocks could then provide PTPv1
and PTPv2 functionality (using multicast) with timing
based on that derived from the Primary Leader Clock.
This method may be used to provide Dante device tim-
ing across different subnets for complex or especially
large applications. For more in-depth control of these
clocking issues the Dante Domain Manager (DDM)
software application can be very useful.
Dante Sync Status: The Model 5402 can simultane-
ously serve as a Leader clock for both Dante primary
and Dante secondary networks and is capable of
supporting both PTPv1 (IEEE 1588-2002) and PTPv2
(IEEE 1588-2008). As such the unit is capable of
acting as four independent Leader clocks: PTPv1 for
Dante primary, PTPv2 for Dante primary, PTPv1 for
Dante secondary, and PTPv2 for Dante secondary.
While the PTP processes are asymmetrical, they do
share the same internal timing reference. The Model
5402 can also act as a PTPv1 and PTPv2 clock fol-
lower but that would typically be utilized only for test
purposes. Standard and Redundant Dante (no AES67
support) uses PTPv1 and that is always enabled in
the Model 5402. AES67 utilizes PTPv2 clocking and if
support for AES67 is desired within the Dante environ-
ment it must be enabled using a configuration setting
in the Dante Controller application.
The Model 5402’s Main menu has four fields that
display the real-time sync status of the PTPv1 and
PTPv2 functions for the Dante primary and Dante
secondary interfaces. If the network configuration in
Dante Controller for this specific Model 5402 has been
selected for Switched or Switched+Mgmt the clocking
status of the Dante primary interface will be displayed.
In this situation, the Dante primary PTPv1 interface
will show Leader, Follower, Link Down, or Error (with
the latter showing in red text). If AES67 support is
enabled in Dante Controller then the same choices
will also be displayed in the primary PTPv2 field.
If AES67 support is not enabled then Disabled will
show in the primary PTPv2 field. Since Dante sec-
ondary is not enabled then the secondary PTPv1 and
secondary PTPv2 fields will show Disabled.
If the Model 5402’s network configuration has been
selected for Redundant or Redundant+Mgmt then
both the primary PTPv1 and secondary PTPv1 sync
status fields will display their respective sync status.
They will show the same choices as described above:
Leader, Follower, Link Down, or Error (with the latter
showing in red text). If AES67 support is enabled in
Dante Controller then the same choices will also be
displayed in the primary PTPv2 and secondary PTPv2
fields. If AES67 support is not enabled then Disabled
will show in both the primary PTPv2 and secondary
PTPv2 fields.
Should Leader be displayed in a specific field it would
indicates that this specific Model 5402 is acting as the
Leader clock for the Dante network and clock function
associated with that field. If Follower is displayed this
indicates that this specific Model 5402 is obtaining
its timing reference from another Dante device on