Model: MTS200 (1U)
Doc. Ref. no. : - m08/om/201
Issue no.: 03
Page 117 of 195
User’s Manual
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.
Figure 11-2 NTP frame format
Below are the list of some of all NTP packet parameters which are functionally significant with respect to
NTP server.
Mode:
3-
bit integer representing the mode with value “4”, means that this device act as NTP server
device and can provide time output for synchronization to NTP client devices but will never be
synchronized by clients.
Peer clock stratum:
8-
bit integer representing the stratum with value “1”, which means that
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act as primary reference source. Stratum value will be fixed at 1 during device Lock conditions.
However, it can be configured between 2 to 15 (via telnet/SSH/keypad/Webserver/serial console terminal)
which will only be applicable during device Unlock conditions.
Clock precision:
This is an eight-bit signed integer indicating the precision of the local clock, in seconds
to the nearest power of two.
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MTS200 is having its internal clock precision of 1 us (1
microseconds = 0.000001s).
Reference Clock identifier:
This is a 32-bit code identifying the particular reference clock. As
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Model MTS200
is stratum 1 primary reference source, it‟s reference identifier is designated as
“GPS”.
Transmit Timestamp:
Time of the server when the NTP response left for the NTP client, in NTP
timestamp format. NTP timestamps are represented as a 64-bit unsigned fixed-point number, in seconds
relative to 0h on 1 January 1900 in terms of UTC. The integer part is in the first 32 bits and the fraction
part in the last 32 bits.
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Model MTS200 provides time format in seconds and fractional
timestamp with a millisecond resolution.
FUNCTIONALITY
If the stratum level of
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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
