I am a beginner on a UA-25EX, and I'm making a cheat sheet for the settings on my interface.  The user manual says that the combo input jacks "support either balanced or unbalanced connections," and that I should "make connections after first checking the wiring diagrams of other equipment you intend to connect."
 
So I am wondering:  a) is the Mogami 2534 cable I'm plugging into my guitar "balanced"?  and b) what other equipment do I need to be checking, and what should I check it for?
 
Thanks!
-Tricia

I found it!  Yes, it is balanced!

http://www.youtube.com/watch?v=_yZH4PB6Qb4&feature=fvwrel

  Actually, there is a problem with this - almost definitely your guitar output jack is unbalanced.  At that point it does not matter whether you plug in a balanced TRS cable or an unbalanced TS 1/4" guitar cable.  The result will be the same - you are using an unbalanced input.  It's a confusing topic in some ways, but what a balanced input really means is that there are two signals, one essentially positive in polarity and one negative in polarity.  They get combined in a way that subtracts interference and noise(this is called "common mode rejection") and leaves you with more of the signal and less of the noise.  A guitar output is unbalanced, so the cable and the input is irrelevant.  If you are to get a balanced connection, both the output and the input and the cable all have to be balanced.  If any of these components are unbalanced, you have an unbalanced signal.