The Graph Properties dialog box associated with a Graph Report provides the means for graph customization. This dialog box is displayed by right-mouse clicking on the graph and choosing the Graph Parameters menu item from the resulting popup menu.
Adding parameters
To add parameters to either axis, select a parameter from the Unused list box by left-mouse clicking on an item. As you select items, a description of the parameter will be displayed below the list box.
Click the appropriate button to transfer the item to the desired axis.
Removing parameters
To remove parameters from either axis, select the parameter from the axis list box by left-mouse clicking on the item.
Click the appropriate button to transfer the item back to the Unused list box.
Specifying Sweep Information
You can specify the range and sweep type for each graph as discussed below.
Choosing a Sweep Type
The Type list box allows you to choose the method by which your circuit will swept:
|
|
Input Power (dBm) |
Sweeps the input power to the associated System Page over the specified range. |
|
|
Temperature (C) |
Sweeps the project system temperature over the specified range. Each System Page has its own system temperature. By default each System Page’s temperature tracks the project temperature. So as the project temperature is swept, each tracking system page will also be swept. You can disable this tracking for any system page if desired (See System Properties ) |
|
|
Frequency (MHz) |
Sweeps the frequency of the top-most System Page (default method). The frequency range applies to the input for a Receiver project and to the output for a Transmitter project. |
Tracking
This box is only displayed for a Frequency Sweep and if the project has a tunable mixer. When unchecked, the mixer LO remains fixed (at the value implied by the Control Palette setting) while the project is swept over the specified frequency. If checked, the LO will attempt to track the swept frequency. The LO can not track beyond its specified range, i.e., the LO will remain at its lower or upper limit if the sweep would cause it to exceed the corresponding limit.
Frequency Translation
If a Receiver Project contains a mixer, the sweep range applies to the project input but the range displayed on the graph applies to the response at the output frequency; however, no frequency translation occurs if Tracking is enabled on this dialog. This is because Tracking would always produce the same output frequency within the LO's ability to track the sweep - this would render the graph useless.
Choosing a Sweep Style
The Style list box allows you to specify whether the sweep will be entered as a Start/Stop or Center/Span set of values. The Start/Stop method defines the starting and ending sweep values, while the Center/Span method specifies the arithmetic center and total span. You must select one of the styles by clicking on the list box and then choosing one of the menu items. The default method is Start/Stop.
Sweep Fields
|
|
Start Field |
The sweep starting value. Used in conjunction with the Stop Field. |
|
|
Stop Field |
The sweep ending value. Used in conjunction with the Start Field. |
|
|
Center Field |
The arithmetic center of the sweep range. Used in conjunction with the Span Field. |
| Span Field | The total span of the sweep range. Used in conjunction with the Center Field. | |
| Res And Step Fields | These fields are mutually exclusive, i.e., entering data in one causes data in the other to be cleared. The Res ( resolution ) field specifies the size of a step in the given sweep, whereas, the Step field allows you to specify the total number of steps. | |
| List Field |
The List field allows you to specify a list of
arbitrary values that will be combined with the Start/Stop or Center/Span sweep
values during analysis. Each entry in the list must be separated by one or more
spaces:
100 200 215 500 // etc. Additionally, you may specify a set of list values by using the following construct: Val1 Val2 .. Valn where Val1 Val2 .. Valn represent the first, second and last values in a sequence of numbers. For example, 1 1.2 .. 1.7 3 3.05 .. 3.2 4 5 would generate the list set 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 3, 3.05, 3.1, 3.15,3.2, 4, 5. The ellipses are literal. This field is useful when the sweep values generated by Start/Stop or Center/Span do not fall on or near points of interest. Those points can be placed in the List field. If any value in the list falls outside the Start/Stop or Center/Span specification, the total range will be expanded accordingly. | |
| Use Global Sweep | Each graph sheet has a local (private) sweep definition that can be used during analysis. Additionally, there is a global sweep definition that is shared by any sheet having the Use Global Sweep box checked. When checked, the sheet uses the global definition during analysis; otherwise, the local definition is used. |
Show Compression Point
When this box is checked, a dotted vertical line will indicate the system 1 dB compression point on the graph. The box is checked by default (applies only to Power sweep type).