Grass Valley iTX System v.2.6 - Manual (Page 161)

Configuring channels
Restart on input resolution change
With Restart on input resolution change selected, you can use the live input to the Output
Server to automatically change the display resolution of the channel at planned times of the
day.
If the iTX Player detects a change in the display resolution of the video signal connected to this
input, it informs TXPlay; this updates the setting for the resolution in the Output Server
configuration and triggers the Output Server to restart; the Output Server then restarts the iTX
Player, so that this plays out content at the new resolution.
You should ensure Restart on input resolution change is not selected if you do not want
changes in the resolution of the input signal to affect the channel configuration in this way.
Reference
In the Reference box, you specify the source of the timing reference signal that is supplied to
the SDI video card in the Output Server machine.
Cache Throttle in Mb/s
The Output Server controls the caching speed when it copies a media file from a Media Store to
the Output Server cache. It sets this speed to the highest value that does not affect playout.
To reduce the load on the network, it may be necessary to reduce the maximum caching speed
the Output Server is allowed to set. You specify the caching-speed limit in the Cache Throttle in
Mb/s box.
Note:
• The default setting is 100Mb/s. It is recommended that you do not enter a value lower
than 40Mb/s to maintain stability.
SCTE 104 Signal – for sequence control
The video signal to the SDI video card in the Output Server machine may contain SCTE 104
messages (also known as digital cue tones). iTX can detect such messages and respond to them.
In doing so, it may start the playout of a sequence that is on hold in a schedule or end a
sequence iTX is playing.
If you want iTX to respond to SCTE 104 messages, you need to select the SCTE 104 Signal
option. You then need to enter, in the Seq Start SCTE 104 Op Code box, the message code that
causes iTX to start the playout of a sequence; and, in the Seq End SCTE 104 Op Code box, the
message code that causes iTX to end the playout of a sequence. Message codes may be any
number between 0 and 255.
iTX responds to these codes after a delay which you set under the Engineering tab of the
Output Server window. (You may set the delay to be zero.) More details , page 255.
Some SCTE 104 messages may require an immediate response from iTX (i.e. without any preset
delay). You need to enter the codes for these messages in the Immediate Seq Start SCTE 104
Op Code and Immediate Seq End SCTE 104 Op Code boxes.
March 2015 System Administrator Guide Page 161 of 404