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DXD/PTP/GPS User Manual (rev 2.10)
13. PTP Port States
When PTP MODE is selected as the reference, the REFERENCE SOURCES Status Display page indicates the PTP state of the
DXD-8. This is similar to the PTP PORTS page on the DXD-16 where all 4 ports are shown.
The different states are:
•
SLAVE
: when another unit has been selected as Grandmaster by the BMCA, the DXD-8 acts as a PTP Slave
•
GRANDMASTER
: when the BMCA chooses the DXD-8 as PTP Grandmaster.
•
MASTER
: transitional state before the Grandmaster state is confirmed by the BMCA
NOTE: as the DXD-8 has the ability to be a PTP Master or Slave, it means that, per IEEE1588, the state of the port can
change. The BMCA determines what unit becomes the Grandmaster. If the current Grandmaster disappears or looses
GPS, another Grandmaster is selected. For more on the Grandmaster selection, go to 3.5.
The PTP setting is displayed in white letters on a dark grey background. Choices are: Port on / Port off
Then the port’s PTP State is displayed as it changes, in bold letters with the following colors:
The PTP domain number of the DXD-8 is indicated to the right of the PTP state in a small blue rectangle.
If GPS is available and has been selected in the reference menu as LOCAL REF WHEN GM, it will appear on the second
section in place of the ALT REF with its current lock status right under.
- SLAVE
black letters
yellow background
- GRANDMASTER
black letters
bright green background
- MASTER
white letters
green background
