Datasheet

Studio Technologies, Inc. Model 5402 Dante Leader Clock with GNSS Synchronization, Issue 5, Page 4
clock. This is understandable as the main purpose of these
devices is to serve functions other than acting as a primary
synchronization reference. Specialized features, such as allow
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ing 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 manipulat-
ing 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 main
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tenance 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 sharing a common timing refer
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ence. The unit’s generation of audio tones and implementa
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tion 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 interconnec
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tions 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 networking 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 connection
is used for both Dante Leader clock functionality as well as
providing access to the Model 5402’s management webpages.
The remaining Dante Ethernet 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 Ethernet
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 connected 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 operation
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 firmware 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 connections, helping to ensure that the Dante capa
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bilities remain up to date. All software files and configuration
parameters are stored in non-volatile memory.