The PowerPivot Configuration Tool uses default values for an initial configuration if they are available. The server farm ...

The PowerPivot Configuration Tool uses default values for an initial configuration if they are available. The server farm account is used to provision all of the services in the farm. This account must be a domain user account. On a new farm, the database server is used to create and run all of the databases used in the farm. If a local SQL Server relational database instance is detected, the configuration tool provides this instance as a default server. You can use any SQL Server relational database engine that is supported for SharePoint 2010 server farms. The Passphrase will be used to add or remove servers from the farm so be sure to type a phrase you will remember.  The  port assignment for accessing Central Administration can be randomly generated or a specific port number. Leave the field blank to use a generated port assignment.