Lantronix SISPM1040-xxxx-L3 Web User Guide
33856 Rev. A https://www.lantronix.com/ 326
Clock Time Properties Data Set: The clock time properties data set is defined in the IEEE 1588 Standard.
The data set is both configurable and dynamic (i.e., the parameters can be configured for a grandmaster).
In a slave clock the parameters are overwritten by the grandmasters timing properties. The parameters are not
used in the current PTP implementation. The valid values for the Time Source parameter are:
16 (0x10) ATOMIC_CLOCK
32 (0x20) GPS
48 (0x30) TERRESTRIAL_RADIO
64 (0x40) PTP
80 (0x50) NTP
96 (0x60) HAND_SET
144 (0x90) OTHER
160 (0xA0) INTERNAL_OSCILLATOR
UtcOffset: In systems whose epoch is UTC, it is the offset between TAI and UTC.
Valid: When true, the value of currentUtcOffset is valid
leap59: When true, this field indicates that last minute of the current UTC day has only 59 seconds.
leap61: When true, this field indicates that last minute of the current UTC day has 61 seconds.
Time Trac: True if the timescale and the value of currentUtcOffset are traceable to a primary reference.
Freq Trac: True if the frequency determining the timescale is traceable to a primary reference.
ptp Time Scale: True if the clock timescale of the grandmaster clock and false otherwise.
Time Source: The source of time used by the grandmaster clock.
Leap Pending: When true, there is a leap event pending at the date defined by leapDate.
Leap Date: The date for which the leap will occur at the end of its last minute. Date is represented as the number
of days after 1970-01-01 (the latter represented as 0).
Leap Type: The type of leap event (i.e., leap59 or leap61).
Servo Parameters: The Basic clock servo uses a PID regulator to calculate the current clock rate. i.e.
clockAdjustment =
OffsetFromMaster/ P constant +
Integral(OffsetFromMaster)/ I constant +
Differential OffsetFromMaster)/ D constant
Display: If true then Offset From Master, MeanPathDelay and clockAdjustment are logged on the debug terminal.
P-enable: If true the P part of the algorithm is included.
I-Enable: If true the I part of the algorithm is included.
D-enable: If true the D part of the algorithm is included.
'P' constant: [1..1000] see above.
'I' constant: [1..10000] see above.
'D' constant: [1..10000] see above.
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