| 
      Our Testing | 
      Phantom | 
      comments | 
    
    
      | Determine dead elements | 
      Yes | 
      No | 
      The phantom cannot distinguish between a dead element, bad
        transmitter, bad receiver, or broken wires. | 
    
    
      | Determine broken wires | 
      Yes | 
      No | 
      See above | 
    
    
      | Determine delaminated lens | 
      Yes | 
      No | 
      A delaminate lens is repairable at fraction of
        the cost of a new probe | 
    
    
      | Determine fractional bandwidth | 
      Yes | 
      No | 
      Can affect overall resolution | 
    
    
      | Determine pulse width | 
      Yes | 
      No | 
      Can affect overall resolution | 
    
    
      | Determine center frequency | 
      Yes | 
      No | 
      Important in penetration and depth. | 
    
    
      | Determine if probe is repairable | 
      Yes | 
      No | 
      Delaminated lens or broken wires may be
        repairable, bad or weak elements are not repairable. | 
    
    
      | Help trouble shoot system problems | 
      Yes | 
      Yes | 
      Our testing can eliminate the probe as the
        source of system trouble. A phantom can help discover a system problem
        but is inconclusive in determining if it is the probe or the system. |