Model: MTS200 (1U)
Doc. Ref. no. : m08/om/201
Issue no. : 03
User’s Manual
Page 144 of 195
Page 144 of 195
Figure 11-10 NTP Time distributions in Hierarchical Arrangement
As shown in figure 11.3,
mas
TER
T-Sync
receives time form GPS Satellites. According to NTP protocol,
GPS satellites are considered to be operating at stratum level 0 as most accurate time source. As the
devices passes down to other levels of network architecture, stratum level increases by 1.
mas
TER
T-
Sync
MTS200 model operates at stratum level 1 which is considered next accurate time source to GPS
Satellites. Other NTP clients stratum level increases by 1 as NTP devices goes downwards in network
layers. Stratum level can be upto maximum 14 to be considered as valid NTP time source.
NTP client accuracy also depends on the hierarchical arrangement of NTP servers and NTP clients in
network because the stratum value increases by 1 at every hierarchical stage in network and as stratum
value increase
s, the accuracy of NTP client decreases depending on the type of NTP server‟s clock
accuracy in hierarchy, processing capabilities of multiple NTP requests and transmission delays.
FUNCTIONALITY
If the stratum level of
mas
TER
T-Sync
Model MTS200 device is configured
at 15 under Unlock conditions, no NTP client will synchronize its time with
NTP server output as level 15 is the last limit of stratum as per NTP
standard.
Stratum of
mas
TER
T-Sync
MTS200 under Unlock conditions should be
such that last NTP client in hierarchical arrangement should be at stratum
level 15 so that can be continuously synchronized with its superior level
NTP source device.
INFORMATION
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.
