Siemens HydroRanger 200, Инструкция по эксплуатации

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Page 208 HydroRanger 200 – INSTRUCTION MANUAL 7ML19985FC03
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P832 TVT Shaper Adjust
Allows manual adjustment of the TVT curve. Use this parameter in conjunction with
Dolphin Plus PC Software.
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.
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.
Primary Index
Single Point Model Dual Point Model
Breakpoint Transducer and Breakpoint
Values
Range: -50 to 50
Preset: 0
Related
• P831 TVT Shaper
Primary Index
Single Point Model Dual Point Model
Global Transducer
Values
Range: -30 to 225
Preset: 50
Related
• P800 Near Blanking
• P834 TVT Start Duration