TH
They could opt out on both channels at the same time time, but they would have to show the same opt-outs on both channels. I'm only mentioning it because they actually did that several years ago to simulcast regional news on both SVT2 and SVT24.
The main Swedish channels are carrying regional opt-outs in HD now; for SVT1 HD, SVT2 HD and TV4 HD that has apparently been the case since May 2012:
http://www.svt.se/omsvt/om-sandningarna/regionala-sandningar/regionalt-i-hd-kanalerna
http://tv4gruppen.se/Pressmeddelanden/2012/TV4-HD-blir-lokalt-nedbrytbar/
They have regional SIDs for all the SVT1 and SVT2 regional variations. Most of the time they point to the PIDS for the Network SVT1 and SVT2 audio and video streams, but when they opt-out on SVT1 OR SVT2 the regional SVT1/2 SIDs are re-pointed to the regional audio and video stream PIDS. This means they can opt-out on either SVT or SVT2 - but not at the same time.
However they squeeze all of the streams onto a single transponder to avoid a re-tune. And there is still a nasty transition (a grey screen for a second or so on the receiver I saw)
They don't do it for HD broadcasts. (And don't have regional news on their DVB-T2 HD variants either, and broadcast Stockholm's regional news nationally on the HD versions)
However they squeeze all of the streams onto a single transponder to avoid a re-tune. And there is still a nasty transition (a grey screen for a second or so on the receiver I saw)
They don't do it for HD broadcasts. (And don't have regional news on their DVB-T2 HD variants either, and broadcast Stockholm's regional news nationally on the HD versions)
They could opt out on both channels at the same time time, but they would have to show the same opt-outs on both channels. I'm only mentioning it because they actually did that several years ago to simulcast regional news on both SVT2 and SVT24.
The main Swedish channels are carrying regional opt-outs in HD now; for SVT1 HD, SVT2 HD and TV4 HD that has apparently been the case since May 2012:
http://www.svt.se/omsvt/om-sandningarna/regionala-sandningar/regionalt-i-hd-kanalerna
http://tv4gruppen.se/Pressmeddelanden/2012/TV4-HD-blir-lokalt-nedbrytbar/