The Computerized Packet Reporting System (APRS) employs particular audio frequencies to transmit digital information over radio channels. These frequencies, when modulated onto a service wave, signify binary data that may be decoded by APRS-equipped gadgets. The usual is usually 1200 Hz and 2200 Hz, comparable to the Bell 202 commonplace for Audio Frequency Shift Keying (AFSK) modulation. For instance, a 1200 Hz tone may signify a binary ‘1’, whereas a 2200 Hz tone represents a binary ‘0’.
This modulation method facilitates the sharing of real-time data, reminiscent of location information, climate reviews, and brief messages. The usage of these audio tones permits APRS to leverage present FM radio infrastructure, making it a flexible and cost-effective resolution for novice radio operators and different customers. Its growth and widespread adoption have considerably improved situational consciousness and communication capabilities in varied functions, together with emergency response and outside actions.
