Scheduler is a client-side application (javascript). But server-side scripts can be used to generate xml and save changes in the database.
So, you just need to download the scheduler package and open its samples (html packages) in browser. It is better to open using ….
The db related samples requires some extra steps
a) db dump need to be used from common/dump.sql
b) db connection configured in samples\01_initialization_loading\php\events.php