Originally Posted by Kansas Zephyr
But they are using SDI...not composite, according to their CE.
Since KAKE uses a Grass Valley M21 for their master control switching, it can't be SDI (Serial Digital Interface), as this model is composite analog only and that device is what is used to 'key' the tickers over programming.
The signal path would have to begin with the ABC HD network video feed, which would be downconverted to SD SDI for distribution, then the SDI feed would be encoded into NTSC composite analog to pass into the M21 switcher, where the ticker is inserted with the switcher's downstream keyer.
The final output of the M21 master control switcher then gets decoded from NTSC composite analog back to SD SDI, then upconverted to 720p HD to finally leave the station either OTA or through direct fiber optic link to Cox and AT&T UVerse.
Simple solution - IMO: replace the outdated composite analog switcher with a HD capable switcher and no more of this up and down conversion nonsense.
Reality: KAKE trying to program five separate zones (Wichita, Garden City, Colby, Salina and Great Bend/Russell/Hays) in HD with limited funding from their corporate parent, Gray TV!!