HX1 APRS Transmitter Hookup Guide
MikeGrusin 
Getting Licensed
Before we go too much further, we'll remind you that since this transmitter uses an amateur radio frequency, you will need an amateur radio license to operate it. Don't worry; getting a license is easy and opens you up to a whole new world of technical capabilities.
The most basic license class, Technician, will be sufficient to use this transmitter. You'll need to pass a 35-question test, and the entire pool of questions and answers is available beforehand for you to study. If you've been playing with electronics for a while and know Ohm's Law (V=IR), you're halfway there. The rest involves memorizing some straightforward rules and regulations.
The first step is to go to the American Radio Relay League (ARRL) website. The ARRL is the amateur radio community organization. Even though your license will be issued by the Federal Communications Commission (FCC), the ARRL handles training and testing. At the ARRL website you'll find a list of upcoming exam sessions near you, as well as practice questions and other useful information.
Once you pick an exam date and location, study! In addition to the ARRL website, there are a number of books, websites, and apps that can help you study. On test day, show up with the required fee, a photo ID, a #2 pencil, and a nonprogrammable calculator (phones aren't allowed). When you finish the test, the examiners will tell you immediately whether you passed or not. If you passed, you'll get your callsign in the mail in a few weeks. And once you have your callsign, you can legally transmit with the HX1 (as well as do many other things).