DXD8/PTP User Manual (rev 2.15)
Page 17
11. Positional change from an External PTP Grandmaster
When the DXD is referenced to an external PTP Grandmaster and a disruption or an error causes a positional change in
the PTP Grandmaster, the DXD will respond differently based on how it has been set by the operator.
11.1 JUMP TO RELOCK
One of the parameters in menu 1.2 is the PTP Jump Threshold.
When the time difference detected between the external PTP GM and the DXD System Time is above the PTP Jump
Threshold value, the DXD will jump to the new time and relock through the normal lock procedure. This will cause
disruptions on the output signals but will be the fastest way to be locked with the external PTP GM.
The Jump Threshold can be adjusted in menu 1.2 from 5 msec to 15 sec, or set to ‘Never’ (default value is 5
msec)..
Keep in mind that, with a 15 seconds Jump Threshold, it could take the DXD-8 a long time to slew back in sync. During
that time, the lock status will indicate HOLD / PTP SYNC (see ch. 11 above).
