micxingthe between the phasr and frepaancy shift keying

Form of modulation that represents digital data as variations in the amplitude of a carrier wave

Follow this link to get exact idea of Amplitude Shift Keying (ASK)

http://www.circuitsgallery.com/2012/05/binary-amplitude-shift-keying-bask-or.html

amplitude shift keying is a form of modulation in digital signal that variation in the amplitude of carrier wave.

application of ask:

*used mainly for radio frequencies

Scheme is simple, so it is easy to implement transmitter and receiver with several components.

low bandwidth requirements

Amplitude shift keying changes the height/power of the transmitted signal without altering the frequency. Frequency shift keying changes the frequency of the transmission without altering the height/power of the transmitted signal.

Morse code is an example of amplitude keying where the amplitude is 0 or 100%.

RTTY teleprinter uses FSK with two frequencies and the codes that represent text characters are sent with patterns of the two frequencies.