HUNT VALLEY, MD.: Sinclair Broadcast Group said it secured an extension of its retransmission agreement with Dish Network. Sinclair (NASDAQ: SBGI) said under deal terms, Dish would continue to carry the signals of SBGI owned and/or operated stations, and those for which it provides programming or sales. The agreement also provides Dish with certain rights to carry local content produced by Sinclair via video-on-demand.