In order to produce streams that are compatible with SMPTE ST 2110-20, ST 2110-22, ST 2110-30 and ST 2110-40, the app server(s) must be locked to a valid source of PTP.
An extensive range of controls are provided via the app server's Advanced → PTP menu.
For now, it is useful to know that:
- Each App Server acts as a PTP slave only. This means that a PTP master clock source must be installed somewhere on the network, either by configuring another streaming node or installing a separate grandmaster device.
- The PTP master should be capable of taking an incoming sync signal and generating PTP clock. You can read more about the PTP implementation in the Lawo IP Networking Guide.
- At any moment in time, there can be only one PTP master operating on the network. If a device is set to master-slave mode, then the current mode is determined by the PTP priorities set within the device itself and all other streaming nodes.
The PTP Configuration settings (for an App Server) are where you can set and adjust mandatory PTP parameters, including domain, announce and sync intervals, delay request intervals, and unicast mode.
Options like TAI offset and hybrid mode can also be enabled or adjusted, ensuring precise synchronization for your system.
All available settings are explained fully in Advanced -> PTP.