Model 5401A User Guide
Issue 4, August 2021
Studio Technologies, Inc.
Page 9
Model 5401A
DANTE LEADER CLOCK
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 5401A’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 5401A.
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 5401A. If, for example, the Sync Input 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 5401A 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 5401A management resources. An internal web
server function supports the Model 5401A’s manage-
ment port’s webpages. These webpages are used for
configuration, monitoring, and maintenance of Model
5401A operation. Refer to Figure 2 for an overview
of the Model 5401A’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, SMgmt,
or ReMgmt. If configured for either the
Switched or Redundant mode the management web-
pages are accessed by way of the management Eth-
ernet port. When configured for the SMgmt
mode the management webpages are accessed by
way of either the primary or secondary Ethernet port.
When configured for the ReMgmt 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 5401A 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 5401A’s enclosure. The Ethernet
interfaces support auto MDI/MDI-X so that crossover
cables are not required. Refer to Appendix B, located
Dante Controller Network
Model 5401A Ethernet Port
Switch Configuration
Pri
Sec
Mgmt
Switched
Dante
Management
Redundant
Dante Primary
Dante Secondary
Management
SMgmt
Dante and Management
Disabled
ReMgmt
Dante Primary and Management
Dante Secondary
Disabled
Figure 2. Model 5401A Ethernet Port Configuration and Operation
