2006-11-18 13:08:49 · 2 answers · asked by Meder 2 in Science & Mathematics ➔ Physics
Hi. All de-codable signals modulate something. Amplitude or signal strength, frequency, or phase. In FSK, two frequencies are chosen and the signal changes from one to the other. This change, or shift, is used to carry the signal. Hence FSK. Found this which may help. : http://www.answers.com/main/ntquery?s=frequency%20shift%20keying&gwp=16
2006-11-18 13:22:07 · answer #1 · answered by Cirric 7 · 1⤊ 0⤋
Shift keying is term that used for modulation with discrete signals. So in Frequency Shift Keying (FSK) you use frequency modulation (like in analog world) however your modulating signal can have only finite number of discrete values. For instance if you have a carrier of 1 MHz and modulate it with two signals, say 1 V and 5 V, (how to do it is beyond your question) you might get two frequencies: 1.1 MHz and 1.3 MHz.
2006-11-19 01:42:49 · answer #2 · answered by fernando_007 6 · 0⤊ 0⤋