page_title: Frequency-shift keying
hierarchical_section_title: Frequency-shift keying
context_page_description: Frequency-shift keying is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal. The technology is used for communication systems such as telemetry, weather balloon radiosondes, caller ID, garage door openers, and low frequency radio transmission in the VLF and ELF bands. The simplest FSK is binary FSK. BFSK uses a pair of discrete frequencies to transmit binary information. With this scheme, the "1" is called the mark frequency and the "0" is called the space frequency.
context_section_description: Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal.  The technology is used for communication systems such as telemetry, weather balloon radiosondes, caller ID, garage door openers,  and low frequency radio transmission in the VLF and ELF bands.  The simplest FSK is binary FSK (BFSK). BFSK uses a pair of discrete frequencies to transmit binary (0s and 1s) information.  With this scheme, the "1" is called the mark frequency and the "0" is called the space frequency.
caption: An example of binary FSK