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Issue 4, August 2021 Model 5401A User Guide
Page 8 Studio Technologies, Inc.
Model 5401A
DANTE LEADER CLOCK
Future Capabilities
The Model 5401A was designed so that its capabili-
ties 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 5401A’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 5401A will be mounted in
one space (1U) of an equipment rack. In many cases,
an external synchronization source will be connected
to the sync input BNC jack. If needed, a connection
may be made to the word clock output BNC jack on
the back panel. One or more Ethernet data connec-
tions will be made. AC mains and/or DC power will
be connected to the Model 5401A.
Using a coaxial cable terminated with a BNC plug, an
external source of synchronization may be connected
to the sync input. 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 5401A using
standard RJ45 patch cables.
AC mains power can be connected to the Model
5401A by means of a detachable cord that is compat-
ible with the unit’s 3-pin IEC 320 C14 inlet connec-
tor. 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 5401A as well as serv-
ing as a backup power source should AC mains not
be present.
What’s Included
The shipping carton contains a Model 5401A Dante
Leader Clock and instructions on how to obtain an
electronic copy of this guide. Also included in the ship-
ping carton is a North-American-standard AC mains
cord. For destinations outside of North America the
local reseller or distributor should provide an appropri-
ate AC mains cord.
Mounting the Model 5401A
The Model 5401A 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 5401A 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. 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.
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 5401A and the Ethernet switch
or switches in the one or more associated local-area-
networks (LANs).
Sync Input
An external synchronization source can be connected
to the Model 5401A’s sync input BNC jack. Located on
the back panel, this input allows the Model 5401A’s in-
ternal timing to be “locked” to an external reference.
Signals that are compatible with the Model 5401A’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
5401A will decode many of the common video rates
and formats, allowing them to serve as a timing refer-
ence. Refer to Appendix A, located at the end of this