Re(2): Re(2): Re(2): [SunRescue] SBus FDDI card question

[Tim Hauber]

rescue at sunhelp.org writes:
>That's actually pretty easy to determine.  Get a decent HeNe laser (solid
>state laser diodes don't have as good of a beam pattern) and shine it in
>one end.  Shine the other end on a piece of white cardstock a couple
>inches away.
>
>It's hard to explain, but the difference is obvious when you try it.  MMF
>has a "halo" effect of constructive and destructive interference.  SMF is
>usually dimmer and has a cleaner profile.
>
>-James
>

I always just looked at the number on the cable, since the HeNe is at my
dad's house, and I'm not sure how stable it is, he has it because it
wasn't stable enough to be a laser mic.
Tim :-)