Cadence® system design and verification solutions, integrated under our System Development Suite, provide the simulation, acceleration, emulation, and management capabilities.
System Development Suite Related Products A-Z
Cadence® digital design and signoff solutions provide a fast path to design closure and better predictability, helping you meet your power, performance, and area (PPA) targets.
Full-Flow Digital Solution Related Products A-Z
Cadence® custom, analog, and RF design solutions can help you save time by automating many routine tasks, from block-level and mixed-signal simulation to routing and library characterization.
Overview Related Products A-Z
Driving efficiency and accuracy in advanced packaging, system planning, and multi-fabric interoperability, Cadence® package implementation products deliver the automation and accuracy.
Cadence® PCB design solutions enable shorter, more predictable design cycles with greater integration of component design and system-level simulation for a constraint-driven flow.
An open IP platform for you to customize your app-driven SoC design.
Comprehensive solutions and methodologies.
Helping you meet your broader business goals.
A global customer support infrastructure with around-the-clock help.
24/7 Support - Cadence Online Support
Locate the latest software updates, service request, technical documentation, solutions and more in your personalized environment.
Cadence offers various software services for download. This page describes our offerings, including the Allegro FREE Physical Viewer.
The Cadence Academic Network helps build strong relationships between academia and industry, and promotes the proliferation of leading-edge technologies and methodologies at universities renowned for their engineering and design excellence.
Participate in CDNLive
A huge knowledge exchange platform for academia to network with industry. We are looking for academic speakers to talk about their research to the industry attendees at the Academic Track at CDNLive EMEA and Silicon Valley.
Come & Meet Us @ Events
A huge knowledge exchange platform for academia. We are looking for academic speakers to talk about their research to industry attendees.
Americas University Software Program
Join the 250+ qualified Americas member universities who have already incorporated Cadence EDA software into their classrooms and academic research projects.
EMEA University Software Program
In EMEA, Cadence works with EUROPRACTICE to ensure cost-effective availability of our extensive electronic design automation (EDA) tools for non-commercial activities.
Apply Now For Jobs
If you are a recent college graduate or a student looking for internship. Visit our exclusive job search page for interns and recent college graduate jobs.
Cadence is a Great Place to do great work
Learn more about our internship program and visit our careers page to do meaningful work and make a great impact.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
Overview All Courses Asia Pacific EMEANorth America
Instructor-led training [ILT] are live classes that are offered in our state-of-the-art classrooms at our worldwide training centers, at your site, or as a Virtual classroom.
Online Training is delivered over the web to let you proceed at your own pace, anytime and anywhere.
Exchange ideas, news, technical information, and best practices.
The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information.
It's not all about the technlogy. Here we exchange ideas on the Cadence Academic Network and other subjects of general interest.
Cadence is a leading provider of system design tools, software, IP, and services.
Get email delivery of the Cadence blog featured here
Allegro PCB Editor offers drafting and dimensioning features that support electronic design automation (EDA) industry standards that enable you to specify the dimensions of every feature on a board created from the product. This feature gives you greater control over the manufacturing release of your design. The layout editor also enables you to customize the dimensioning process to conform to the manufacturing requirements of your site. Drafting and dimensioning normally occurs in the later stages of the design process.
From the app note mentioned later in this blog, you will learn how to modify several types of dimensions and control their appearance by setting up dimensioning parameters or by editing individual dimensions. In SPB16.5 version of symbol editor and PCB Editor, when you create a dimension, it is saved as a database object. As a result, the dimension becomes associated with the object and gets edited and deleted with the object.
You can watch the video demonstration on dimensioning associability here: Associative Dimensioning
NOTE: If a symbol that has non-associative dimensions in the symbol file is placed on the board, the dimensions remain non-associative on the board.
Enabling New Dimensioning Environment
To invoke the dimensioning environment in SPB 16.5, use any one of the following:
After invoking the dimensioning environment, right-click to see the various dimensioning commands available in Allegro PCB Editor.
Migrating Dimensions into SPB16.5
When migrating a board with dimensions into SPB16.5, you have the following options:
Dimensioning Commands in SPB16.5
1. Moving dimensions to another class/subclass
To move an existing dimension to another class/subclass, use the Z- Move Dimensions command.
The valid class-subclasses are:
2. Displaying dimension Information
To see dimension-related information, use the Show Dimension command.
This command opens the "show element" form.
3. Modifying dimensions globally
By initiating the Parameters command, you can set the global parameters for dimensioning to the existing as well as future dimensions. This command displays the Dimensioning Parameters dialog.
In the example below, the linear dimension settings are changed globally.
NOTE: If you change the parameters displayed in blue, these changes will be applied to future dimensions only.
4. Modifying instance-specific dimensions
You can also change the instance-specific parameters using the Instance Parameters command. The parameters displayed in blue can be set to a value other than the global parameter for that particular dimension.
For example, dual dimension is added below the primary linear dimension.
NOTE: The instance-specific setting initially shown is the last setting for the selected dimension.
Similarly, you can add tolerance to any dimensioning instance.
5. Deleting Dimensions
To delete dimensions, choose the Delete dimensions command and select dimension. This command dissociates the selected dimensions from the object and removes them from the database.
6. Locking and unlocking dimensions
To fix/unfix the location of dimension text or leader end-point, use the Lock dimensions and Unlock dimensions commands.
7. Moving and changing dimension text
To move the dimension text location, use the Move text command. This command lets you move and place the dimension text to a new location. Similarly, to edit the dimension text, use the Change text command. You can change the text string by entering the new value in the Options tab.
Watch an elaborative video on dimensioning in Allegro PCB editor at:
Refer to the app note here for the detailed step-by-step procedures on the Dimensioning functionality, as well as various other aspects that are not covered in this blog.
Note: The above link can only be accessed by Cadence customers who have valid login credentials for Cadence Online Support (https://support.cadence.com/).
Naveen KonchadaCadence Customer Support
Is there a way to add subclass under Package Geometry such as Assembly_Top in the "Dimension Environment"?
I am using the OrCAD 16.3,after dimensioning the board, i can' t modify it, then delete option to.so in case i want to increase or decrease the dimensions, its not getting worked.So can you provide the solution for this problem..