Importing generic floating point data

I am trying to import synthetic SAR data into the S1TBX. It is a floating point matrix of 4096 x 4096 pixels. I am apparently successful as I walk through the import --> SAR formats --> Generic Binary–> some input parameters come next that make sense, but then nothing happens. Nothing imported, nothing displayed, etc. Does anyone have any experience with this process? I ultimately am hoping to create metadata and an image file that I can run as synthetic S1 data through one of the S1TBX algorithms. Thanks for any tips!

can you please describe yoru data a bit more?
Where does it come from? What is the file type? Does it have a header?