Decklink Mini Recorder Viewer Software

I recently installed a Decklink mini recorder PCIe card into one of our servers. The main use for this was to be able to remote in and view a feed from our router or multiview since this is a cable headend. Is there any free software besides Blackmagic Desktop Video that will allow me to simply view the HD-SDI signal coming in full screen? Desktop Video works ok but I can't seem to make the preview screen any bigger or full screen it.

I just need some basic software that when launched opens up the signal coming in and just allows me to view it. I don't need recording.

It's over kill but OBS will do what you want.