EVS XT[2] User Manual

Issue
10.03.B
XT Series DISK RECORDER
–
Version 10.03 - Hardware Technical Reference
EVS Broadcast Equipment SA
–
July 2010
36
2.8.5 XNET PERFORMANCES & 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 video server where the clips are stored. If the EVS video server “owning”
the clips is doing multiple playbacks at the same time, freezes can occur on
the remote EVS video 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 or 540Mbps, 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 XNet.
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 video 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.

EVS XT[2] Specifications

General

Brand	EVS
Model	XT[2]
Category	Server
Language	English