Advanced ABS Options dialog box

Analysis Section - Analysis Options dialog box


The Advanced ABS Options dialog box is opened when you click on the Advanced button in the Adaptive Sweep Settings section of the Analysis Options dialog box. The controls are detailed below.

ABS Caching Level: The ABS caching level determines if and how much of the ABS caching data is stored in your project. The levels are detailed below.

It is important when using this option that all your analyses use the same subsectioning frequency. This ensures that any pre-existing ABS cache data can be used in the present analysis. The default setting used to determine the subsectioning frequency is to use the highest frequency from the present analysis job. If you perform multiple sweeps over different frequency bands then the cache data from one run will be invalid for the next, since the subsectioning frequency would be different. In order to avoid this you should use the controls for the subsectioning frequency found in the Advanced Subsectioning dialog box to ensure that the same frequency is used for all analyses. For more details about setting the subsectioning frequency, please see the Advanced Subsectioning Options dialog box.

ABS Frequency Resolution per Sweep: The resolution provides the minimum value of the gap between data points in an ABS sweep. This can be calculated automatically by the solver or input by the user.

There are several things to be aware of when using the manual setting for the ABS resolution. Coarse resolution does not speed things up. Once a rational polynomial is found to ''fit'' the solution, calculating the adaptive data uses very little processing time. A really coarse resolution could produce bad results by not allowing the ABS algorithm to analyze at the needed discrete frequencies. Fine resolution does not slow down the analysis unless the number of frequency points in the band is above approximately 1000 - 3000 points. A step size resulting in at least 50 points and less than 2000 points is recommended.

Enhanced Resonance Detection: For details on this option, please see the Advanced Options dialog box.