Old revisionsBacklinksAdd to bookExport to PDFODT exportImport Word DocumentBack to top Book Creator Add this page to your book Book Creator Remove this page from your book Manage book(0 page(s)) Help Preferences The Display Preferences page can be accessed via the Preferences button on the ruby mobile app main page. There are additional pages for changing how signal data are viewed in the ruby mobile app: Horizontal Axis of Spectra Frequency Hz/RPM Sampling Rate Format Display Max and Min Digital Format Log In