How do you scope a current source?

[J.D. McEachin]

Sorry 'bout that last message - my fingers slipped twice...

Ob DIY:  How do you check out a current source on a scope?  I have a DAC 
that I'm trying to figure out if it's good or bad, and I would think that 
putting a resistor between the probe and DAC output would give me 
something to measure.  I'm not seeing anything.  Am I missing something 
obvious, or is the DAC bad?

Thanks
JDM