two-tone frequency keying - ορισμός. Τι είναι το two-tone frequency keying
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Τι (ποιος) είναι two-tone frequency keying - ορισμός

MODULATION SCHEME FOR TRANSMISSIONS
Frequency shift keying; AFSK; Audio frequency-shift keying; Mark frequency; Mark tone; Space tone; Space frequency; Frequency Shift Keying; Audio frequency shift keying; Gaussian frequency-shift keying; Audio fsk; FSK standards for use in Caller ID and remote metering; Fsk standards for use in caller id and remote metering; GFSK; BFSK; GFSK modulation
  • thumb

Multiple frequency-shift keying         
MFSK; Multi-frequency shift keying; Mfsk16; MFSK8; MFSK16; Mfsk4; Mfsk32; Mfsk64
Multiple frequency-shift keying (MFSK) is a variation of frequency-shift keying (FSK) that uses more than two frequencies. MFSK is a form of M-ary orthogonal modulation, where each symbol consists of one element from an alphabet of orthogonal waveforms.
DTMF         
  • Two CMD CM8870CSI DTMF Receivers
  • DTMF keypad layout.
  • Combination of 1209 Hz and 697 Hz sine waves, representing DTMF "1"
TELECOMMUNICATION SIGNALING SYSTEM
Dual-tone multifrequency signaling; DTMF; Multifrequency signaling; Dual tone multi-frequency; Touch tone; Touch Tone; Dual tone multi frequency; Tone dialing; Touch-Tone; Touch-tone; Touch tone frequencies; Touch tone music; Touchtone; Touch-tone dialing; Dtmf; Dual-tone multi-frequency; Dual-Tone Multi-Frequency; Dual-tone multi-frequency signalling; Touch tones; ITU-T Recommendation Q.23
DeskTop Management task Force (Reference: Intel)
DTMF         
  • Two CMD CM8870CSI DTMF Receivers
  • DTMF keypad layout.
  • Combination of 1209 Hz and 697 Hz sine waves, representing DTMF "1"
TELECOMMUNICATION SIGNALING SYSTEM
Dual-tone multifrequency signaling; DTMF; Multifrequency signaling; Dual tone multi-frequency; Touch tone; Touch Tone; Dual tone multi frequency; Tone dialing; Touch-Tone; Touch-tone; Touch tone frequencies; Touch tone music; Touchtone; Touch-tone dialing; Dtmf; Dual-tone multi-frequency; Dual-Tone Multi-Frequency; Dual-tone multi-frequency signalling; Touch tones; ITU-T Recommendation Q.23
Dual Tone Multi Frequency

Βικιπαίδεια

Frequency-shift keying

Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is encoded on a carrier signal by periodically shifting the frequency of the carrier between several discrete frequencies. 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), in which the carrier is shifted between two discrete frequencies to transmit binary (0s and 1s) information.