I am not sure if there is a misunderstanding here; IrScrutinizer captures irsignals with a device of some sort, not with a "cable". The ones supported are IrWidget, GlobalCache, IrToy, Arduino, CommandFusion. The current development version [Link: github.com]
adds support for /dev/lirc (on Linux) and replaces "Arduino" by general "Girs client". For more details, see the documentation, or ask.
You may try this: [Link: harctoolbox.org]