Brainstorm Electronics DXD/GPS, Руководство по эксплуатации

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Page 6 DXD/PTP/GPS User Manual (rev 2.10)
4.2 PTP - CLOCK / GRANDMASTER (MENU 5.2)
This menu lets you set the following fields for the Grandmaster PTP port.
• Domain : 0 to 127; default = 0
•
Priority 1 : 0 to 255
•
Priority 2 : 0 to 255
Priorities are used in the BMCA to select the grandmaster - lower values have a higher priority (see 12.5 for more
information on the Grandmaster selection).
4.3 PORT CONTROLS (MENU 5.3)
•
Profile : Different profiles are supported by the DXD-8:
-
PTP - Default PTP profile
-
AES 67
-
ST2059
•Profile Port Timing Action:
Among other things, IEEE1588 profiles define the range and default values of all configurable attributes. This is
very useful as selecting a specific profile on several networks would set all the parameters to the default values
and allow for a quick set up.
This menu gives you the option to set the timing values to the profile default values.
4.4 PORT TIMING (MENU 5.4)
•
Announce Interval : -3 to 4 (1/8sec - 16sec)
Sets the rate at which the master will send Announce messages.
Per IEEE 1588 this value should be uniform throughout a domain.
• Announce Receipt Timeout : 2 to 10 announce intervals
Sets the number of Announce messages that can be missed before it is assumed the master is no longer present and the
process of selecting a new one begins. Per IEEE 1588 this value should be uniform throughout a domain.
•
Sync Interval : -7 to 1 (1/128sec - 2sec)
Sets the rate at which the master will send Sync messages
•
Min Delay Req Interval: 1 to 32 the number of Sync Interval
Sets the minimum time interval between 2 adjacent Delay Requests. This field shows a quantity of sync intervals:
“n sync intervals”, where n = 1,2,4,8,16,32 (when n=1 it will say “1 sync interval”).
This change does *not* apply to the peer-to-peer “MIN PDELAY REQ INTERVAL”.