Example image of eyePlorer eyePlorer map for 'Quadrature amplitude modulation': Modulation Amplitude Amplitude modulation Amplitude-shift keying Bitstream Carrier wave Degree (angle) Phase (waves) Quadrature phase Sine wave Phase-shift keying Data Phase modulation Frequency modulation Frequency-shift keying Demodulation Product detector Trigonometric functions Orthogonality Low-pass filter Crosstalk (electronics) Analog television NTSC PAL AM stereo C-QUAM Radio Double-sideband suppressed-carrier transmission Frequency domain Constellation diagram Binary numeral system Telecommunication Bit Symbol rate Bit error ratio Noise Cable modem Digital cable QAM tuner Society of Cable Telecommunications Engineers United States Digital terrestrial television Freeview (UK) Top Up TV United Kingdom Spectral efficiency Ethernet over coax G.hn ITU-T Power line communication