This week 6 of the 12 games are being carried by the PAC-12 (5 national and 1 regional). The other six are also broadcast. Next week 6 of the 12 are again on the PAC-12, but only one is national and the other five are on the regional networks. So depending on the set up, it is possible to miss six of the twelve games carried by the PAC-12 even with an agreement. To me, this is why the BTN format of having alternate channels available for concurrent live broadcasts is the preferred way to go.