Grass Valley K2 System Guide v.7.2 - Manual (Page 29)

07 April 2010 K2 System Guide 29
Loop through, E to E, and feeds
• Outputs are timed to the reference and if no reference is present, the output runs
free.
• If the input video rate does not equal the output video rate (asynchronous) then
video tearing or jumping can occur when input/output synch is critical, such as in
the following:
• K2 TimeDelay
• SD-00 or Summit E-to-E (LoopThru) mode
• HD-00 Loopback
Loop through (K2 Summit Production Client, K2 Solo Media Server, or SD-00 K2
Media Client)
The Player/Recorder application has a “E-to-E (LoopThru) mode” selection on the
Control menu. This mode applies when the channel is under local AppCenter control
as well as when it is under remote control, for all protocols.
This “E-to-E (LoopThru) mode” feature allows you to monitor the video that is being
recorded. The video is routed back essentially untouched. Any audio or timecode that
is on the input video stream is still there on the loop through output. The K2 Summit/
Solo, or SD-00 K2 Media Client, and the loop through videos must be locked to a
video reference for the loop through feature to work properly. This “E-to-E
(LoopThru) mode” feature should not be confused with true E to E, such as that on
the SDA-00 K2 Media Client. True E to E is not supported on theK2 Summit/Solo or
SD-00 K2 Media Client.
When “E-to-E (LoopThru) mode” is not selected, the channel behaves as follows:
• “PB” is displayed on the channel pane, next to the Timecode Source indicator.
• When no clip is loaded, black plays out.
• When a record operation stops, Recorder becomes Player and the clip remains in
the Player. The clip’s last frame plays out.
When “E-to-E (LoopThru) mode” is selected, the channel behaves as follows:
• “EE” is displayed on the channel pane, next to the Timecode Source indicator.
• When no clip is loaded, the signal that is currently present at the channel input
plays out.
• When a record operation stops, Recorder stays Recorder and the clip remains in the
Recorder. The signal that is currently present at the channel input plays out.