Please contact your IT department and/or the Signals Notebook administrator.
Only your Signals Notebook administrator can give you access to Signals Notebook Standard Edition.
For details, admins can refer to System Configuration Guide:
User Management > Users > Adding Users
Once your user is created, you will get and email about how to access their Signals Notebook. please follow the instructions provided in the email and then start accessing their Signals Notebook.
If tenant admin has any issue in adding user, they can contact Support