The Ground Motion Suite Dialog is a powerful tool that allows the user to define a record for use with single dynamic analysis, and to define a suite of one or more records for use in spectral analysis, and save those records so they can be retrieved at any time without going through the selection of individual records again.

The dialog is comprised of two major sections for defining the default couple for use in single dynamic analysis, or a suite of records for use in paramteric spectral analysis.

Default Ground Motion Couple (Top Section)

The top section of the dialog shows the current default earthquake couple (two components) to be used in a single analysis, the couple can be specified or changed by reading one or two new earthquake components using the Earthquake Dialog. The user can interact with this section by:

1. Reading new components or editing existing components in the Earthquake Dialog, by pressing the "Edit Couple Dialog" button: 
2. Typing in a new name for each component ("Component 1" and "Component 2")
3. Checking the component files for errors by attempting to load the records from disk, using the "Check Couple Errors" button: 
4. Adding the couple to the "Ground Motion Suite" by pressing the "Add Couple to Suite" button:
5. Updating the couple by copying a couple from the "Ground Motion Suite" by pressing the "Make Default Couple" button for a selected couple in the suite: 

Ground Motion Suite (Bottom Section)

The bottom section shows the current "Ground Motion Suite", which is a suite (list) of ground motions couples that can be edited with ground motions added or removed. Depending on the Bispec edition being used, a large number of records can be added to each suite, allowing the user to easily conduct parameteric studies of 10's, 100's, or even 1000's of ground motion records (See "Feature Comparison" section).  Suite records can be added, deleted, or edited by using different buttons:

1. The "Add New Couple" button ( ) can be used to add new couples using the Ground Motion Dialog.
2. The "Delete Selected Couples" button (  ) can be used to remove the currently selected couples from the suite list.
3. The "Edit Current Couple" button ( ) can be used to edit the selected couple using the Ground Motion Dialog.
4. The suite can be checked for errors using the "Check All Records for Errors" button (). Errors might include missing files, or files with unrecognizable formats.
5. The "Make Default Couple" button ( ) can be used to update the Default Ground Motion Couple (see above section) by copying the currently selected couple in the "Ground Motion Suite".
6. Similarly, the "Default Ground Motion Couple" can be added to the current ground motion suite by pressing the "Add Couple to Suite" button (  ).
7. Sometimes ground motion files get moved, and the links saved in the suite get broken. The "Change All Paths" button ( ) allows the user to change the folder path for all records in the suite simultaneously. Individual records can always be edited and modifed by using the "Edit Current Couple" button (  ).
8. The "Batch Add Records" button can be used to add multiple ground motion records at once. This allows the user to easily add an unlimited number of records, without having to import them one at a time.

Information about the current suite can be modified through a number of text fields:

1. The name of the suite can be specified in the text field "Suite Name" located to the right of the list. This can be used by the user for reference.
2. The file name that the suite will be saved to can be changed in the "File Name" text field.
3. A "Suite Scale" for all records in the suite can also be specified. This can be a convenient way to scale all the records in the suite by the same scale factor. Each record can also be scaled by its own amplification factor in the Ground Motion Dialog. The two scale factors (record and suite scale factors) are multiplicative.
4. The identifier (name) for the currently selected couple can be viewed and modified in the "Current Couple" text field.

A main feature of the Ground Motion Suite feature is that suites can be saved to the hard disk, and can be re-opened and accessed at any later time. Different suites can be constructed and saved for later use. When more than one ground motion couple is included in a suite, spectra are computed individually for each couple, and the mean and standard deviation and other statistics of the whole suite are also computed. See the sections on Linear and Nonlinear spectral snalysis.

Figure 4: Ground Motion Suite Dialog