Define the Frequency range for SerDes Analysis

From the menu bar, click Analysis > Electrical Analysis Constraints.
The Electrical Analysis Constraints dialog displays as below:

Change the two frequency values in the EM Solver Run Control
Parameters as follows, and these are marked with red boxes in
the above figure of the dialogue.
 Lower bound of frequency points is 1000. It means 1GHz.
 Upper bound of frequency points is 20000. It means 20GHz.
Please note that the EM Solver Run Control Parameters are frequency information used for converting PCB interconnectors into equivalent circuits for SerDes simulation.

Change the two frequency values in the Network Analysis
Parameters as follows, and these are marked with red boxes in
the below figure of the dialogue.
 Starting frequency (MHz) is 1000. It means 1GHz.
 Ending frequency (MHz) is 20000. It means 20GHz.
Please note that the Network Analysis Parameters refer to the following aspects: The first aspect involves setting the frequency range for Sparameter simulation in advance. By defining this constraint, the network analysis (Sparameter) will automatically use the specified frequency range during simulation.
 The second aspect pertains to the frequency range used for calculating the impulse response required for SerDes simulation. This tool utilizes an algorithm that converts Sparameters into impulse responses to compute the impulse response of the object within the defined frequency range.