Could you check Miniflex (not Meter or Easyflex) for detection of the faults in short ranges (7-30 metres). From my experience old Miniflex works excellent on short coax TV cables. I'm sure it will be the same in your mater. I heard on last sales conference in Seba, that will be new Miniflex in the product range.
Ask Seba directly!.
See you. Szwed

