Milltronics AiRanger SPL PL-573, Instruction Manual

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Page 76 AiRanger SPL PL-573
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P830 TVT Type
Use this feature to select the TVT Curve most suited to the material and vessel.
This feature is automatically altered when Material (P002) is altered.
Do not select "TVT SLOPES" when the "bF or bLF" Algorithm (P820) is selected.
Values:
1 = TVT Short Curved
2 = TVT Short Flat
3 = TVT Long Flat
4 = TVT Long Smooth Front
5 = TVT Long Smooth
6 = TVT Slopes
P831 TVT Shaper
Use this feature to turn the TVT Shaper "on" or "off".
Turn the TVT Shaper "on" before altering TVT Shaper Adjust. After TVT Shaper
Adjust has been used to modify the TVT Curve (to avoid a false echo or pick up the
true echo), this feature allows the TVT Shaper to be turned "on" and "off" while
monitoring the effect.
Values:
0 = off
1 = on
P832 TVT Shaper Adjust
Use this feature to bias the shape of the TVT curve, in order to avoid it crossing false
echoes from fixed objects.
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 ...
e.g. index, breakpoint1, value 0