InterRanger DPS300
88
7ML19981BC01
Values:
0 = off
1 = on
P832 TVT Shaper Adjust
Use this feature to bias the shape of the TVT curve away from undesirable echos.
Adjustment to this parameter is best done while viewing the echo profile on an
oscilloscope (refer to P810). When using an oscilloscope, the Echo Lock Window
display becomes the TVT Curve Pointer.
The TVT curve is divided into 40 breakpoints, accessible by enabling the point
number as the breakpoint index field. Each breakpoint is normalized to a value of
0, as displayed in the parameter value field. By changing the breakpoint value, up
or down, the intensity of the bias applied to that breakpoint of the curve is
respectively changed. By changing the value of adjacent breakpoints, the effective
bias to the shaper can be broadened to suit the desired correction. In the case of
multiple false echoes, shaping can be applied along different points of the curve.
Shaping should be applied sparingly in order to avoid missing the true echo.
To change a breakpoint ...
with the desired transducer point selected
Pressing
sets the point
number to index.
Pressing
selects the Auxiliary function
Pressing
scrolls the breakpoint index
through points 1 to 40, and moves the
curve pointer left or right respectively.
And,
Pressing
changes the bias value of
the breakpoint, -50 to 50
Pressing
enters the change in value.
e.g. index, breakpoint 1, value 0
e.g. auxiliary function
e.g. transducer 1
e.g. oscilloscope displays breakpoint 5, value 0
e.g. breakpoint 5, value 14