Selenio™ Network Processor
User Guide
SNP Manager Menus
© 2019 Imagine Communications Corp.
Proprietary and Confidential.
May 2019 | Page 56
PTP Locking Mode
Options are:
•
PTP Only:
System timing and frequency locking are based on ST 2059-1
signal in the IP network. Operating in this mode, due to the IP network
and ST 2059-1 tolerances, you may see a few microseconds of wander
on the SNP's SDI outputs. There is no operating impact of such wander
in a modern SDI facility, as all receivers will be able to lock and track to
such signals. However, if there is any concern then use another mode as
described below.
•
PTP with Black Assist:
This mode uses analog black reference input for
the frequency locking and PTP for the time. Network time will be
adjusted so outputs are 0 phased to analog black. If the external analog
black is not zero phase-aligned to ST 2059-1, then PTP locking status will
report unlocked. If PTP is not present, SNP can still operate in this mode
maintaining all outputs aligned to the analog black reference.
Click
Apply PTP
for the changes to take effect. If you do not click
Apply PTP
and click
Close
to navigate
away from the page, your changes will be lost.
Status
These items are displayed for informational purposes only.
PTP State
Reports the following options:
•
Locked
•
Locking
•
Unlocked
Master Present
Reports if a remote master is presently being listened to.
Master IP Address
IP address of the master being listened to.
Master Interface IP Address
IP address of the local interface of the master being listened to.
Grandmaster UUID
Universally Unique Identifier for the grandmaster.
Master Delay
The transmission latency for a message in one direction.
Master Offset
The time difference between the master and the SNP. A positive value
indicates that the SNP is ahead of the master.
UTC Time
Reports the UTC time.
