Model: MTS200 (1U)
Doc. Ref. no. : - m08/om/201
Issue no.: 03
Page 145 of 195
User’s Manual
It is recommended that NTP output in network should be used only when
once device is Lock after being power UP. If device was in Power OFF
condition for very long duration, RTC battery may get discharged and RTC
time will reset to its default time. (Please check the applicable battery
backup period mentioned in RTC section).
Note:
I.P. address of two NTP ports in GPS should not be same if both NTP ports are to be used in
same network domain.
Among all applicable NTP parameters in NTP packet format, only stratum value can be modified
for Unlock condition only. If NTP output stratum value is configured as 15, all NTP clients in
network will continue to ignore NTP output as valid time source.
As NTP protocol is based on UDP transmission protocol (as UDP is a connectionless protocol as
there is no acknowledgment for failed packet delivery), NTP requests from NTP clients to NTP
servers and NTP responses from NTP servers to NTP clients can be delayed at irregular intervals
or rarely discarded if there too much Ethernet packets load/congestion in network.
It is recommended that NTP output in network should be used only when once device is Lock
after being power UP. If device was in Power OFF condition for very long duration, RTC battery
may get discharged and RTC time will reset to its default time. (Please check the applicable
battery backup period mentioned in RTC section).
If unit was Lock for once after being Power UP, it will retain accurate NTP output in holdover
conditions (according to its local clock ppm accuracy).
NTP Client time accuracy depends on multiple factors such as Client local clock frequency ppm,
network load and congestion, type of clock synchronization algorithm in NTP Client devices other
than Unix/Linux PC, hierarchical arrangement of NTP servers and NTP clients in network and
mas
TER
T-Sync
Model MTS200 NTP Clock output accuracy during holdover conditions (when
device is Unlock as per ppm of internal clock crystal) etc.
