Frequency shift keying

1. What is meant by frequency shift keying?
2. What is FSK used for?
3. What is the difference between FSK and FM?
4. What is the difference between FSK and Mfsk?

What is meant by frequency shift keying?

Frequency-shift keying (FSK) is a method of transmitting digital signals using discrete signals. The two binary states -- logic 0 (low) and 1 (high) in a binary frequency-shift key mechanism -- are each represented by an analog waveform.

What is FSK used for?

Frequency-shift keying (FSK) is commonly used over telephone lines for caller ID (displaying callers' numbers) and remote metering applications.

What is the difference between FSK and FM?

FSK is widely used in computer modems, such as fax modems, telephone caller ID systems, garage door openers, and other low-frequency transmissions. Radioteletype also uses FSK. Frequency modulation is widely used for FM radio broadcasting.

What is the difference between FSK and Mfsk?

Multiple frequency-shift keying (MFSK) is a variation of frequency-shift keying (FSK) that uses more than two frequencies.