Frequency Shift Keyer

A Frequency Shift Keyer (FSK) is a digital modulation technique used in telecommunications and data transmission. It involves shifting the frequency of a carrier signal to represent different binary data symbols. In FSK, two different frequencies are used to represent the two binary states (0 and 1).

When transmitting a binary 0, a specific frequency is used, and when transmitting a binary 1, a different frequency is used. The receiver then detects the frequency shifts and decodes them back into the original binary data.

FSK is commonly used in applications such as radio communication, telecommunication systems, and data transmission over telephone lines or computer networks. It is a simple and efficient modulation technique that allows for reliable transmission of digital data.