Siemens MAG 1100 Operating Instructions Manual page 382

P832 TVT Shaper Adjust
Allows manual adjustment of the TVT curve. Use this parameter in conjunction with
Dolphin Plus PC Software.
Primary Index
Values
Related
Use this feature to bias the shape of the TVT curve to avoid selecting false echoes from
fixed objects.
Adjustment to this parameter is best done while viewing the echo profile with Dolphin
Plus. Refer to the Dolphin Plus online help for details.
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.
P833 TVT Start Min
Use this feature to adjust the TVT Curve height to ignore false echoes (or pick up true
echoes) near the start of the Echo Profile.
Primary Index
Values
Related
Enter the minimum TVT Curve start point (in dB above 1 uV RMS).
This feature should only be used if increased Near Blanking (P800) would extend farther
than desired into the measurement range.
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Single Point Model
Breakpoint
Range: -50 to 50
Preset: 0
• P831 TVT Shaper
Single Point Model
Global
Range: -30 to 225
Preset: 50
• P800 Near Blanking
• P834 TVT Start Duration
Dual Point Model
Transducer and Breakpoint
Dual Point Model
Transducer
7ML19981FB05