Manual

Model 5401A User Guide Issue 2, July 2021
Studio Technologies, Inc. Page 9
Installation
In this section the Model 5401A will be
mounted in one space (1U) of an equipment
rack. In many cases, an external synchroni-
zation 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 connections 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 compatible with the unit’s 3-pin IEC
320 C14 inlet connector. Some applications
may warrant connection to a source of nomi-
nal 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 serving 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 shipping carton is a
North-American-standard AC mains cord.
For destinations outside of North America
the local reseller or distributor should pro-
vide an appropriate AC mains cord.
Mounting the Model 5401A
The Model 5401A Dante Leader Clock re-
quires 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 Mod-
el 5401A does not contain a fan or other
noise-producing source it can be located
within a room or other structure where au-
dio 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 limi-
tation. 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 internal tim-
ing 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 ap-
plied to the sync input. Refer to the Specifi-
cations section of this guide for the general
characteristics required of acceptable exter-
nal 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 termina-
tion has been enabled for the sync input
when it has been configured for word clock
an impedance of 75 ohms will be applied.