Manual

Issue 2, July 2021 Model 5401A User Guide
Page 10 Studio Technologies, Inc.
A source of bi-level or tri-level video can
also be connected to the sync input. Circuit-
ry within the Model 5401A will decode many
of the common video rates and formats, al-
lowing 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 con
-
nected to the Model 5401A’s sync input.
This type of signal is commonly used as
a timing reference in industrial and instru-
mentation applications. An impedance of 50
ohms will be applied to the sync input if ter-
mination 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 refer-
ence, 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 Giga-
bit Ethernet (GigE) ports for flexibility and
compatibility with many networking imple-
mentations. 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 (sec-
ondary). The third Ethernet port, labeled
MGMT, can be used to access the Model
5401A management resources. An internal
web server function supports the Model
5401A’s management port’s webpages.
These webpages are used for configura-
tion, monitoring, and maintenance of Model
5401A operation. Refer to Figure 2 for an
overview of the Model 5401A’s three Ether-
net ports and how they can operate.
Using the Dante Controller application,
the three Ethernet ports can be config-
ured to operate in one of four modes:
Switched, Redundant, Switched+Mgmt, or
Redundant+Mgmt. If configured for either
the Switched or Redundant modes the
management webpages are accessed by
way of the management Ethernet port.
When configured for the Switched+Mgmt
mode the management webpages are
accessed by way of either the primary or
secondary Ethernet ports. When configured
for the Redundant+Mgmt mode the man-
agement webpages are accessed using an
Ethernet connection made to the primary
Ethernet port.
By providing three Ethernet ports and four
configuration modes, the Model 5401A al-
lows support for virtually all facilities, includ-
ing those that utilize separate networks for
Dante audio transport and equipment man-
agement. 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 sepa-
rate from an engineering network that is
used by technical personnel for configuring
and maintaining a facility or “plant.”