Menu bar

On starting the acquisition module, the user is presented with a screen display such as that shown in Figure 5. The screen is divided into four sections signal display status bar menu bar and toolbar and ultrasonic controls. 

The editor provides two modes for drawing the structure and the draw mode. This distinction is important for differentiating chemical information from conventional drawings. Both modes are switchable and provide an extensive set of features in the menu bar to create chemical structures and reactions, or just drawings. The number of options can be quite confusing for beginners however, one becomes accustomed to them after a short period of vocational adjustment. 

Menu Bar, Pull-Down Windows The first item in the menu bar is the pulldown menu (File), which lists the appropriate selections (Open File), (Close File), and (Close LinReg). 

The second item in the menu bar is (Data), which lists the selections (Round, Column Width), respectively (Choose Vectors). 

The third item in the menu bar is (Options), which lists the program-specific selections, here (Font), (Scale), (Specification Limits), (Select p), (LOD), (Residuals), (Interpolate Y = /(x)), (Interpolate X = j y)), (Clear Interpolation), respectively (Weighted Regression). 

The last item in the menu bar is (Output), which contains the selections (Setup Printer), (Setup Print Job), (Print Graph and Main Results), (Print Table of Detailed Results), and (Copy to Clipboard). 

Across the top there is a menu bar with the usual Windows-type pull-down menus arranged from left to right in the order Files, Data Selection, Data Manipulation, Extras/Options, Output, or similar. Those options that are allowed or make sense in a given context are activated. Requests for numerical input make use of the standard Windows-type gray box with the question that is to be answered, the white area into which the data is written, and the appropriate confirmatory Yes/No/Cancel buttons. 

Once plotted, a new menu bar appears with plot options. The plot can be displayed as points, connected, or as a bar chart. The data can be presented on linear or log axes, with or without grid. Text can be placed on the display in a variety of sizes and types. Lines or arrows can be drawn or areas filled. The user can edit all axis labels and titles if desired. Re-scaling is accomplished by means of the shrink and zoom options or by entering exact scale limits. Multiple curves can be annotated with keyed symbols. Plot coordinates are displayed in real time as the operator moves the mouse over the plot. 

The transform option is selected from the plot menu bar. It displays a box which allows the user to select an operation to be performed on an entire axis of data. These can be any of three general types. The first are algebraic series of operations called "scripts". The second are unit transformations. The third are higher operations such as integration or Fourier Transform. 

A window at the menu bar (Menu -> Math - Curve Fit) is edited as follows... 

On entering the program (by a double click on its icon), the only thing you will see is the menu bar. To begin work, you must bring up on screen the window corresponding to a data base by going to the options "New Database" or "Open Database" File menu). 

For this example, we will assume that you are opening the files that were copied to your hard drive during the installation. Select File, Open, and then Project from the Capture menu bar ... 

We will now add some traces. In the schematic we have labeled two nodes, Vin and Vout. Since we know the names of the nodes, we can easily plot the voltages. We will first plot Vin. To add a trace, select Trace and then Add Trace from the menu bar ... 

We can now use the markers to display the currents or voltages in the circuit. To obtain a voltage marker, select PSpice and then Markers from the Capture menu bar ... 

We now have a number of traces displayed. However, the current trace is small. Suppose that we would like to look a little closer at a peak in the current waveform. We can do this by using some of the zoom features provided by Probe. Select View and then Zoom from the menu bar ... 

The question we will ask is How does the voltage at VO vary as VX is raised from 0 to 25 volts We will also view some of the currents through the components. Since this is a DC Sweep, all capacitors are assumed to be open circuits, and all inductors are assumed to be short circuits. We will now set up the DC Sweep. From the menu bar select PSpice and then New Simulation Profile ... 

We are now ready to simulate the circuit. Select PSpice from the menu bar and then select Run. Capture will first create an updated netlist and then run PSpice. When the simulation is complete, the Probe window will display an empty plot ... 

Next, we would like to find the values of ViL, ViH, V0l, V0h. NMh, and NMl. Before we continue, we will instruct Probe to display the points used in the evaluation of goal functions. Select Tools and then Options from the Probe menu bar ... 

We are now ready to set up the simulation. From the Capture menu bar select PSpice and then New Simulation... 

We will now add a trace that shows the phase of the voltage at node VX. Press the INSERT key from the Probe menu bar. The dialog box below will appear. The phase operator is located at the end of the list in the right window pane ... 

The phase and magnitude can be displayed as shown in previous sections. In this example we would like to show a Bode plot that displays the magnitude in decibels. To display Vo in decibels, we need to display the trace dB(V(VO)). Select Trace and then Add Trace from the Probe menu bar. In the text field next to Trace Expression enter the text DB (V(VO)) ... 

Run the PSpice simulation Select PSpice and then Run from the Capture menu bar. When the simulation is complete, the Probe window will open. Add the trace DB(V(VO) ) to plot the gain in decibels. Use the cursors to label the mid-band gain, and upper and lower -3 dB frequencies. Your cursor values may be slightly different than those shown here. 

We are now ready to run the simulation. Select PSpice and then Run from the Capture menu bar. The PSpice simulation window will appear ... 

When the simulation is complete, Probe will automatically run. Add the trace V(VR) (select Trace and then Add Trace from the Probe menu bar). The trace of the resistor voltage will appear as shown below. See page 98 to change the display to have Probe use the entire window ... 

Add the capacitor voltage trace V(VC) by selecting Trace and then Add Trace from the Probe menu bar ... 

To run the simulation, select PSpice and then Run from the Capture menu bar. When Probe runs, add the trace I (LI). To add a trace select Trace and then Add Trace from the Probe menu bar or press the INSERT key. You will see the following Probe window ... 

We must now change the x-axis from time to the input voltage, Vj . Select Plot and then Axis Settings from the Probe menu bar. The X AXIS tab is displayed by default ... 

To apply the waveform displayed in the Stimulus Editor window to the VI part in the schematic and return to the schematic, select File and then Exit from the Stimulus Editor menu bar ... 

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