How to measure Vth of MOS transistor against his lenght in ADE

Draw schematic, like this:

Gate-source voltage V0 must be a half of Supply voltage (V1)

Steps for Cadence IC ver. 6
1. Choose DC analysis, check boxes Save DC Operation Point, Enabled and press OK.
2. Select test transistor and open his properties (Edit - Properties - Objects...), in string l (M) delete the value of lenght and write variable name (LL for example), press OK.
3. Open Calculator, select op, click on test transistor, in window OP Parameters for ... select vth from list box. Put the result expression from the Calculator to the Outputs (OP("/M0","vth") in my case)
4. Go to Parametric analysis and add range for LL (500n - 10u for example)
5. Run simulation

Steps for Cadence IC ver. 5
1. Choose DC analysis, check boxes Save DC Operation Point, Enabled and press OK.
2. Select test transistor and open his properties (Edit - Properties - Objects...), in string l (M) delete the value of lenght and write variable name (LL for example), press OK.
3. Choose value for variable LL in ADE
4. Run analysis
5. Open calculator, go to tab info, select op, choose our transistor, in window OP Parameters for ... select vth from list box. Put the result expression from the Calculator to the Outputs (OP("/M0","vth") in my case)
6. Go to Parametric analysis and add range for LL (500n - 10u for example)
7. Run parametric analysis.