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P050 Negative End 
 
 
The point at which, the negative gain line intersects the 0.0m distance y axis. 
This parameter determines the angle at which the rate of near signal amplitude 
suppression, (gain attenuation), is applied, over a distance starting at the gain 
breakpoint . See the explanation of P43 for details. 
 
Values  Min = -999 
  Max = 999 
 
P051 Margin Enable 
 
 
This parameter is associated with P52 End Margin.  
1 switches the feature on 
0 (off) is the default value 
Values  Min = 0 
  Max = 1