Generating a COM Analysis Report From the SPISim User Interface

Channel operating margin (COM) analysis generates a .csv report file and binary waveform plots from analyzed data in a streamlined format. Electronic Desktop 23.2 supports COM keywords up to V3.40 (with some experimental flags excluded, listed at the bottom of this page).

A COM analysis report can also be generated outside of the SPISim User Interface. Refer to Generating a COM Analysis Report Using a Non-GUI Batch Command Line and UDO/UDS-Based COM/ERL Calculations for HFSS-Based Solutions for details.

To begin the process of generating a COM analysis report via the SPISim User Interface, complete the following steps to open the Config. and generate COM report ... window. Alternatively, refer to the animated demonstration following these instructions.

From Electronics Desktop

From the Circuit menu, select ToolkitCOM.

Toolkit > COM Menu

Before the Config. and generate COM report ... window opens, a Checking License(s) ... window opens.

Checking License(s)... Dialog Box

From SPISim

From the S-Param menu, select Generate ReportChannel operating margin to open the Config. and generate COM report ... window.

S-Param > Generate Report > Channel Operating Margin

Config. and Generate COM Report... Window

Follow the steps below to configure and then generate a COM analysis report.

  1. Click the Browse ... button in line with the Thru type S-param field to open an explorer window.

  2. Navigate to and choose an .sNp file to include it in the COM analysis report. Then click Open.

  3. Click the Browse ... button in line with the Output result folder field to open an explorer window. Choose a location to save the COM analysis report output files, which includes .raw, .csv, and .png files that remain accessible to the user outside of the context of the COM analysis report.

  4. Click Open.

  5. Before continuing, ensure that the Generate summary report page. check box, beneath the Output result folder field, is checked (checked by default).

Generate Summary Report Page

  1. Click the Settings tab to view the current configuration of the analyzed data.

    Config and Generate COM Report... Window > Settings Tab > Subtabs

    If necessary, choose another baseline configuration on the Spec drop-down menu, or select Customized to make individual changes to each field.

Config and Generate COM Report... Window > Settings Tab

Note: The configurable settings are extensive, see Generate A COM Analysis Report - Settings Tab. If the user is upgrading from a previous version of Electronic Desktop, and currently has both versions installed, they can Export their configuration settings (e.g., .cfg file) from both versions and compare them. New parameters will be clearly visible in this side by side perspective. While Electronic Desktop supports COM keywords up to V3.40, not all keywords will be defined. Undefined keywords will function at their default values.
Compare COM Export Settings
For more information, refer to the IEEE 802 LAN/MAN Standards Committee website and the IEEE P802.3ck 100 Gb/s, 200 Gb/s, and 400 Gb/s Electrical Interfaces Task Force Home Page.
  1. Click Calculate and the output folder selected in Step 3 populates with .raw (i.e., Berkley spice), .csv, and .png files.

  2. When the report is ready, a Report generation ... window appears. Click Yes to open the COM analysis report in the system's default browser.

Report Generation... Dialog Box

Continue to COM Analysis Report Summary
Animated Demonstration
Note: New features have been added to SPISim that are not mentioned in the following video tutorial. Relevant features, such as the number of configurable parameters, their locations within the Settings tab, and the expanded subtabs available, are documented in the prior instructions.

Excluded Experimental Flags
Note: Experimental flags excluded from the V3.40 COM keywords are: RILN related flags (COMPUTE_RILN, COMPUTE_TDLIN, RILN) and TDMODE, Save_TD.