Issue 3, August 2021
Model 5402 User Guide
Page 16
Studio Technologies, Inc.
Model 5402
DANTE LEADER CLOCK WITH GNSS SYNCHRONIZATION
Main Menu
Once the correct user name and password have been submitted the Main menu webpage will be displayed. This menu
provides the ability to select three important operating parameters as well as displaying eight key real-time conditions. In
addition, the menu system allows direct access to other menu webpages.
Main Clock Source:
This is a configurable field with four
choices: Internal, GNSS, Sync Input, and Dante.
This setting determines which source will be the main
(normal) timing source that is used by the Model 5402’s
circuitry as its own “Leader” timing reference. This is the
clock source that will be used by the Model 5402’s PTPv1
and PTPv2 servers that are critical to the Model 5402’s
support of related Dante devices. When Internal is selected
the Model 5402’s temperature-stabilized, high-performance
crystal oscillator is utilized. This will provide excellent tim-
ing accuracy and consistent long-term performance. This
source is far superior to that provided by other standard
Dante devices. This is the correct choice if GNSS is not go-
ing to be utilized or a high-quality external reference signal
is not going to be connected to the sync input.
When GNSS is selected the timing reference that is derived
from the selected satellite constellation or constellations
will be used. This would be, assuming that a solid GNSS
“lock” can be established, the most accurate and consistent
timing source. It’s expected that GNSS will be selected in
most Model 5402 applications.
When Sync Input is selected the Model 5402’s sync input
function will be utilized. Using a BNC jack, located on the
Model 5402’s back panel, an external source of word clock,
video reference, or 10 MHz sine wave can be connected.
Circuitry within the Model 5402 will “lock” (synchronize)
the internal timing signals to the externally provided refer-
ence signal.
Selecting Dante will instruct the Model 5402 to use the clock
signal provided by its Dante interface circuitry as its refer-
ence timing source. The Dante interface circuitry will either
use its internal crystal oscillator or synchronize to another
Dante device on the associated network. The actual clock
source used by the Model 5402’s Dante interface will de-
pend on a setting in the Dante Controller application.
The Model 5402 includes the choice of Dante as the main
clock source only for trouble-shooting or other factory-
directed activities. It’s not expected that this selection will
ever be used during normal Model 5402 operation. By
selecting Dante the excellent timing performance that can
be provided by the GNSS receiver, the sync input, or the
internal oscillator would not be utilized.
Failover Clock Source:
This is a configurable field with
two choices: Internal and Dante.
This configuration choice selects which timing source will be
used should the Model 5402’s selected main clock source
