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ManualsBrandsAMX ManualsComputer equipmentDESIGN XPRESS-PROFESSIONAL V 1.1 - PROGRAMMER GUIDE
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Web-Based Configuration Pages
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IS-SPX-1000 & IS-SPX-1300 Inspired Signage XPress Players
NTP Statistics
The NTP Statistics page logs all contact with the NTP servers currently being accessed or monitored.
FIG. 29 Administration - Date/Time - NTP Statistics
Administration - Date/Time - NTP Statistics
NTP Statistics: This section logs all contact with the NTP servers currently being accessed or monitored. If this option
has been chosen. Click the Refresh button to update the statistics.The following informations are
displayed:
Server IP: Displays the IP address of the Network sources.
Stratum: A static measure representing the number of servers up to a reference time server (usually
an atomic clock).
Status:
• peer - The server used for the time synchronization.
• candidate - A server whose time is consistent with the player and may be used in case the peer
is no longer available.
• reject - The server is not used, because its stratum is too low or it has been configured as
"Monitor only" in the Time Sources.
• outlier - The server is too different from the peer to be used for synchronization.
• initializing - Appears during transition phase or when it cannot be reached.
Reach - How often the server has been reached as a percentage within the last 8 attempts; it
should be as close as possible to 100%.
Time offset: The time difference in milliseconds between the player time and the NTP server time.
Delay: The time delay in milliseconds between the moment the player has send the request and got
the answer from the NTP server; it should be as small as possible.
Dispersion: When repeatedly reading the time, the time offset may vary almost randomly and the
difference (second derivation) of these time offsets is called jitter or dispersion. Note that a small
value is needed for synchronized content.
Poll interval: The time interval between requests towards the NTP server. It will start with the
minimum value and gradually increase up to the maximum value; for internal NTP servers (min,
max) = (16s, 256s) and for public ones (min, max) = (64s, 1024s).
After the NTP statistics, the information regarding the local clock calibration is displayed. The
correction is displayed in ppm (part per million); for instance 1ppm would mean that the internal clock
will drift with 32 seconds in a year.