Specifications
Synchronized Content
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AMX InspiredSignage XPress Programming Guide
Synchronization
In order to be able to display content on multiple displays, the clocks of the IS-SPX-1000 must be
synchronized. The synchronization is done using the Network Time Protocol (NTP).
Synchronizing devices
The NTP protocol uses one or more NTP servers to be able to control the precision of the internal clock. Using
the NTP protocol it is possible to reach a precision as good as 1 millisecond. This is more than sufficient to
synchronize a video on multiple screens.
The IS-SPX-1000 comes pre-configured with some public NTP servers, which are fine to regulate local date
and time, but with the following limitations:
Time precision around 200 milliseconds.
The firewall needs to let NTP traffic through (UDP port 123).
Synchronized content playback across several screens requires higher precision and reliability.
When using the IS-SPX-1000 in a multiscreen display scenario, the time precision between the IS-SPX-1000
must be increased. Increasing the time precision may be done with one of these four options:
Configure a local or ISP provided NTP server
Use a third party hardware plug & play server
Use a software based NTP server on a PC
Use one IS-SPX-1000 as NTP server for the other IS-SPX-1000.
Configure NTP through the HTTP interface
Open your IS-SPX-1000’s Browser-Based Configuration Pages and choose the Date/Time tab on the left
(FIG. 59) clicking on the Time Sources tab.
Once you are on the Date/Time configuration page, do the following:
1. Make sure the NTP Server button is selected.
2. Insert the address of your NTP server(s). Leave the Monitor only options unchecked. This option is
needed only for advanced configurations.
3. Leave the “Pause device and startup” to “0 s”. If your IS-SPX-1000 is using a local NTP server, you can
increase this value to ensure that your device will boot after your server, in case of power loss or other
circumstances.
4. Click on Apply to enable the new configuration
After you have configured all your devices with your local NTP server(s), they are ready to play synchronized
content.
FIG. 59 Administration - Date/Time page