The converter works well unless source video signal is unstable, but sadly, it does not support composite sync input. I have a Fujitsu FM77AV40EX old 8-bit computer. The display output thereof is 15kHz HSYNC and 60Hz VSYNC and I convert the signal into VGA via dempa XRGB2 converter. But XRGB may output composite VGA sync signal when the source(FM77AV40EX) has only composite sync.
So, in order to capture from FM77AV40EX, I have to convert FM77AV40EX output into S-Video signal (Twinpact100 supports NTSC/PAL vieo input). Yes, I have this type converter (dempa XAV-1) but re-connecting cable work will make me be tired because I am a lazy man.