User manual
5.6.4. Starting XNet
1. When all above conditions are fulfilled, turn on the “Server” EVS video server and start
the Multicam application.
2. Turn on all “Masters” and “Clients” EVS video servers, and make sure the Multicam
application is started on all of them.
3. They should see the “Server” on the network and they will connect automatically.
Connection takes a few seconds (usually between 2 and 5 sec) for each EVS video
server.
5.6.5. XNet Performances and Troubleshooting
1. With the default settings, 10 real-time transfers can be achieved on the network with
standard definition pictures in normal conditions, and 3 real-time transfers with super
motion pictures. Copy of a clip between 2 servers on the network can be made up to 5
times faster than real time, depending on network load.
With high definition pictures, these numbers are reduced to 3-4 real-time transfers and
copy clip 2 times faster than real time.
These performances are also limited by the disk bandwidth available from the EVS
server where the clips are stored. If the EVS server “owning” the clips is doing multiple
playbacks at the same time, freezes can occur on the remote EVS server using those
clips. Priority levels have been implemented to maximize network bandwidth
efficiency: PLAY requests have a higher priority than SEARCH/BROWSE requests,
which in turn have a higher priority than COPY requests. Note that “Live” (E2E) mode
on a remote record train has the same priority level as a SEARCH/BROWSE request.
2. Note that when working at 1485Mbps, only passive SDI routing equipment may be
used. The use of active SDI equipment should be avoided, because they could cause
additional line delays and prevent the proper operation of XNet2.
3. If the start-up of the network at a specific speed does not work properly and all
machines are apparently configured properly and the Multicam is actually started on
all of them, this can be due to the fact that the selected cables to connect all EVS
servers together are not suitable or too long to operate at such a speed. You can
decrease the speed of the SDTI network on all machines and try working in this mode.
The number of simultaneous real-time transfers you can achieve is of course reduced.
4. While working at 1485 Mbps, if the connection cannot be established, please make
sure that all equipments are set to the same speed and connected to the non-relay
connectors. All equipments should be started if not connected to an XHub.
5. It is recommended to use XHub if the network speed is set to 1485 Mbps.
6. Once the network has been established, if the system acting as the network server is
disconnected or shut down, another system will automatically be assigned to act as a
new network server. The switch is automatic. The next machine to be automatically
assigned as new network server is the one with the highest serial number in the SDTI
network.
XT3 Server- Version 11.01- Hardware Technical Reference Manual
5. Hardware Installation and Cabling 55