www.gusucode.com > dsp 案例源码程序 matlab代码 > dsp/UseBilevelMeasurementsPanelWithClockInputSignalExample.m
%% Use Bilevel Measurements Panel with Clock Input Signal % This example shows how to use the Time Scope Bilevel Measurements panel. %% % At the MATLAB(R) command prompt, type <matlab:ex_timescope_clockex % ex_timescope_clockex> to open the example model. The following Simulink(R) % model appears. % % <<../timescope_example4_model_clock.png>> % % In this example, Simulink(R) imports the variable |x|, from the MATLAB(R) % workspace. This variable is created when the model loads because the % commands that construct it reside in the model Preload function. To view % these commands, in the Simulink(R) menu, select |File > Model Properties % > Model Properties|. The Model Properties dialog box appears. Click the % |Callbacks| tab. The following lines of MATLAB(R) code appear. load clockex; ts = t(2)-t(1); %% % Run your model to see the time domain output. To show the |Bilevel % Measurements| panel, in the Time Scope menu, select |Tools > Measurements % > Bilevel Measurements|. Collapse the |Transitions| section, click the % arrow next to the section label. Expand the |Settings| and % |Overshoots/Undershoots| sections, click the arrow next to each label. % The Time Scope appears as shown in the following figure. % % <<../scopes_clock_bilevel.png>> % %% % The value for the rising edge |Settling Time| parameter is not displayed % initially because the default value for the |Settle Seek| parameter % is too large for this example. Here, the settle seek time is longer than % the entire simulation duration. Enter a value for |Settle seek| of 2e-6 % and press the Enter key. The Time Scope now displays a rising edge % settling time value of 118.392 ns. % % The settling time value displayed is the statistical average of the % settling times for all five rising edges. To show the settling time for % one rising edge, zoom in on that transition. In the Time Scope toolbar, % click the Zoom X button.. Click the display near a value of 2 % microseconds on the time-axis. Drag to the right and release near a value % of 4 microseconds on the time-axis. The Time Scope updates the rising % edge settling time value to reflect the new time window, as shown in the % following figure. % % <<../scopes_clock_bilevel_zoomx.png>>