Siemens 200 instruction manual P832 TVT Shaper Adjust, P833 TVT Start Min

Parameters

P832 TVT Shaper Adjust

Allows manual adjustment of the TVT curve. Use this parameter in conjunction with Dolphin Plus PC Software.

Primary Index	Single Point Model	Dual Point Model
	Breakpoint	Transducer and Breakpoint
Values	Range: -50 to 50
	Preset: 0
Related	• P831 TVT Shaper

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	Single Point Model	Dual Point Model
	Global	Transducer
Values	Range: -30 to 225
	Preset: 50
Related	• P800 Near Blanking
	• P834 TVT Start Duration

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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