Learn how your Caddx security system works. We have Caddx user manuals for all makes of Ademco alarm systems. If you need an owner operating manual for your alarm system, you can download a copy of the original alarm user manual here. We currently have information on the following alarm panels: NX-4, NX-6, NX-8, NX-48 and Ranger. User manuals show you how to operate your home security system and how your security protection works. AlarmTech has dealers nationwide that are willing to help you with any qustions about your security system. Alarm monitoring from Local Independent Nationwide. AlarmTech Home Security and Alarm Dealer Network. We are looking for qualified Alarm and security dealers to join our innovative dealer program.