Manual

Issue 2, July 2021 Model 5401A User Guide
Page 40 Studio Technologies, Inc.
button switches to select the desired action.
The choices are to cancel or to confirm.
Press the Enter pushbutton switch to select
the highlighted action.
After performing a system reboot (restart),
20 to 60 seconds may be required for the
Model 5401A’s operation to fully restore.
During this time period the management
Ethernet port will briefly disconnect and
then reconnect.
Screen Saver
A “screen saver” mode will automatically
activate two minutes after the last press of a
front-panel pushbutton switch. When active,
the screen saver mode will cause a continu-
ous sequence of five menu pages to acti-
vate. Each menu page will be present for
about three seconds before the next menu
page will display.
When the screen saver mode is active
pressing the Enter pushbutton switch on
the front panel will cause it to stop and the
current management IP address menu page
to immediate display. To cause the screen
saver mode to immediately start simultane-
ously press the left and right arrow pushbut-
ton switches on the front panel.
There are five menu pages that will display
when the screen saver mode is active.
Details regarding the information provided
in menu pages 2-5 were documented in
previously sections of this guide. The menu
pages consist of:
1. The Studio Technologies’ company logo
graphic.
2. The product name (Model 5401A) and
the Dante device name.
3. The Dante sync status.
4. The current clock source.
5. The current management IP address.
Technical Notes
PTPv1, PTPv2, and AES67
For clock synchronization “native” Dante
utilizes version 1 of the Precision Time
Protocol (PTPv1). Technically, the appli-
cable standard is IEEE 1588-2002, which is
what the Model 5401A supports for applica-
tions that utilize both single and redundant
Dante. When operating in the Redundant
or Redundant+Mgmt network modes, inde-
pendent PTPv1 server functionality is sup-
ported, one instance provided for the Dante
primary port and a second instance provid-
ed for the Dante secondary port.
Applications that utilize AES67 require PTP
version 2 (PTPv2) as covered under the
standard IEEE 1588-2008. (And following
details as specified in the SMPTE ST2059-2
profile.) The Model 5401A will provide sup-
port for PTPv2 if the AES67 mode has been
enabled in the Dante Controller application.
This is in addition to PTPv1 support; both
can function simultaneously. When AES67
mode has been enabled and Redundant
or Redundant+Mgmt mode is selected,
then both the Model 5401A’s Dante primary
and Dante secondary Ethernet interfaces
will provide independent PTPv2 server
functionality. (And to highlight, this is in
addition to PTPv1 functionality.)
In Dante-related AES67 applications the
Model 5401A can provide good PTPv2 func
-
tionality. But the Model 5401A can’t serve
as a general-purpose PTPv2 grandmaster
clock. Limitations in Dante’s AES67 imple-
mentation restricts Studio Technologies’
ability to adjust PTPv2 operating parame-
ters, something that some applications may
require. Refer to Appendix G, located at the
end of the guide, for details on the default
PTPv2 implementation that the Model
5401A provides.