Fostex FR2 with a SD302 mixer?
 

I'm VERY new to sound recording!.....

Can I use/mate a sound devices 302 mixer with a Fostex FR2 field recorder? If so, how?

Thanks

Sd302 ->fr2
 

The SD302 can have its outputs set at +4dbU - which is the input level the FR2 is expecting (or so it appears from the FR2's specs..).
I'd suggest that you download the manuals on each piece of gear and have a read. The SD302 manual is very helpful; I can't speak for the FR2, as I don't own one... but usually examples are given for setting up the equipment for different recording scenarios.
As you are new to sound recording, I can thoroughly recommend Jay Rose's books on audio for DV. Check them out on www.dplay.com .
Rgds, Ross.
~~~~~~~~~~~~~~~~~~~~~~