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9.1. Working with Annotations

Annotations display directly on a schematic, system diagram, or EM structure. For example, the following figure shows where DC current and voltage are annotated on a schematic.

NOTE: For two-port elements, current annotation always displays on node 1.

See “EM Annotations and Cut Planes” for more details on EM annotations.

9.1.1. Hierarchy

Schematics and system diagrams are commonly created using hierarchy. When an annotation is applied to a top level schematic or system diagram, you can push down through the hierarchy to see the annotations. To do this, select any subcircuit in the top level, right-click and choose Edit Subcircuit. You descend into that subcircuit and can see the annotations from the top level displayed at the lower level. From the previous example, see the following figure of the annotation in the "Output Match" subcircuit.

If you open the subcircuit from the Project Browser, there is no annotation display because the Cadence® AWR Design Environment® platform does not know every place this subcircuit is used at a higher level.

9.1.2. Creating a New Annotation

You can create a new annotation by right-clicking the following nodes in the Project Browser and choosing Add Annotation:

  • a circuit schematic node under Circuit Schematics

  • a system diagram node under System Diagrams

  • an EM structure node under EM Structures

or you can select these nodes and click the Annotation button on the toolbar.

An Add Schematic Annotation, Add System Diagram Annotation, or Add EM Structure Annotation dialog box displays, depending on the node. See “Add/Edit Schematic/System Diagram/EM Structure Annotation Dialog Box ” for more information.

Select the Measurement Type and the Measurement to add the annotation, then click OK. The Project Browser displays the new annotation under the appropriate node for the item.

Annotations function identical to graphs in regards to tuning and swept parameters. See “Swept Parameter Analysis ” for more information on swept parameter analysis and results display.

For more information about adding back annotations, see “Adding Back Annotation to a Schematic or System Diagram”.

9.1.3. Modifying the Annotations Display

You can control how annotations display in the Project Browser and on schematics or system diagrams. Choose Options > Environment Options to display the Environment Options dialog box, then click the Schematic Annotation tab to edit annotation display properties on documents. See “Environment Options Dialog Box: Schematic Annotation Tab ” for details on annotation settings.

9.1.3.1. Changing Annotations in the Project Browser

By default, in the Project Browser annotations display directly under each schematic, system diagram, or EM structure, as shown under the "High Power BJT Amp" schematic in the following figure.

You can display them under separate Annotations subnodes if you prefer, by right-clicking the Project node of the Project Browser and choosing Show Annotation Groups.

For example, see the Annotations node with two schematic annotations now included in the following figure.

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