[Lowfer] Problem w/ Freq Cntr

[Peter Barick]

All, esp. techs,

I'm stuck with a problem. I recently got a used Fluke counter from an known equipment provider.
Want to use it to help in building x-tal divider circuits, down to LF.

What it does: Lights up when turned on. The self test according to the manual is okay. But when the 
BNC cable is plugged in the counter goes wild--only when cable connected. Does that when cable
leads are open or, say, connected to a low value resistor.

Oh, once or twice it locked-on to a simple FET osc. circuit of a known crystal.

Ideas??

Peter