Siemens LU01 P833 TVT Start Min, P834 TVT Start Duration, P835 TVT Slope Min, Range -30 to

6.Press ARROWS to change the bias value of the breakpoint, –50 to 50.

7.Press ENTER .

8. Press TRANSDUCER to update the scope display with the new TVT.

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.

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 μV rms).

This feature should only be used if increased Near Blanking (P800) would extend farther than desired into the measurement range.

P834 TVT Start Duration

Use this feature in conjunction with TVT Start Min (P833) to ignore false echoes (or pick up true echoes) near the start of the Echo Profile.

Values	Range: 0 to 9999
	Preset: 30
Related	•	P833 TVT Start Min
	•	P835 TVT Slope Min

Enter the time (in ms) for the TVT Curve to decrease from the TVT Start Min (P833) point to the TVT Curve baseline.

P835 TVT Slope Min

Enter the minimum slope (in dB/s) for the middle of the TVT Curve.

Values	Range: 0 to 9999
	Preset: 200
Related	•	P830 TVT Type
	•	P834 TVT Start Duration

Use this feature to adjust the slope declination, and use it in conjunction with TVT Start Duration (when a long flat TVT Type is selected) to ensure the TVT Curve remains above the false echoes in the middle of the Echo Profile. Alternatively, if TVT Type is set for TVT Slopes (P830 = 6), preset is 2000. Use this parameter to adjust the slope declination when TVT type is set to TVT slopes (P830=6).

Parameters

7ML19985BE02 SITRANS LU01 – INSTRUCTION MANUAL Page 77