Take a look at the updated website page here:
http://www.gonbes.com/en/product_detail.asp?menuid=95&id=23The Amiga's video output is around 15 KHz horizontal scan rate. The only matching video mode listed directly is CGA/EGA. If you were to connect the Digital RGB pins (pins 7-9) and the digital intensity (pin 6) of the Amiga to this adaptor via the P10 or P11 or RGBHV 15 way d-type, you will get an image but only in 16 colours.
The only other way to utilise this adaptor is to take the RGB output, use an Analogue RGB to YCbCr/YPbPr/YUV colour space converter and add an attenuated TTL CSYNC signal from the Amiga, to the Y video output. You could then use the 480i (NTSC) or 576i (PAL) modes that this device supports.
There is an Amiga RGB to component/YUV video adaptor currently in development, not by myself but I am aware of it and reviewed the design, that could be used with this interface adaptor.
Ian