After doing some more reading about the Ceton TV tuner cards, I discovered the Ceton company went out of business a few years ago. Their website lingers on the web for some unknown reason. It turns out the InfiniTV 4 PCI card I bought is one of many with defective on-board storage so I am unable to update the firmware to the best version. I’m really hoping that it works reasonably well. The new HD Homerun Prime 6 is the tuner I really want, but it’s not out yet. They say it’s coming in 2019, hopefully sooner rather than later. I’ll pre-order it if I can. With that tuner I’ll be able to switch to using Emby’s built-in tuner support rather than the NextPVR plugin.