SDR has completely changed the landscape. I'm the developer for the digital television component of GNU Radio. There are transmitters for ATSC, DVB-T, DVB-T2, DVB-S, DVB-S2 and cable QAM. Here's a video of DVB-S2 being transmitted with a LimeSDR.

https://www.youtube.com/watch?v=Ed7iy0gVywo