A quick way
is to use a BNC tee and a ThinNet terminator -- I have these
in my junk box, other folks might too. Works just fine for
most situations.
Be careful using "network-grade" coax terminators for high-frequency RF.
The ones I've seen become reactive as heck above 50 - 100 MHz or so.
Unless you have a way to check their return loss at the frequencies you're
concerned with, I would steer far, far away from 10Base2/ThinNet
terminators in RF lab work.
-- jm
