We do this through Athletic LIVE. It has worked great for meets ranging from small middle school races to the Big East Championship.
There's a lot that goes into the initial setup, but once you have dedicated split computers (and people to work at the splits) it's super smooth! Very cool to do it all through the cloud.
Here's the Big East broadcast that has split data appear as they run over the mats (don't judge the black bar on the left side! We just built the results display!)
Happy to answer specific questions about the setup and what goes into this.
Jesse