frequency shift keying การใช้

• Instead, a form of frequency shift keying was employed.
• The tone is modulated using frequency shift keying.
• A frequency shift keying ( FSK ) signal is alternating between two waveforms, and allows passband transmission.
• It used Frequency Shift Keying ( FSK ) to send data, shifting between 20 kHz and 26 kHz.
• The control channels use signalling at 1, 200 bits per second with fast frequency shift keying ( FFSK ) subcarrier modulation.
• These audio tones, then, SSB transmitter to produce the final audio-frequency shift keying ( AFSK ) radio frequency signal.
• The voice was keyed to two 16-inch vinyl phonograph records that contained a Frequency Shift Keying ( FSK ) audio tone.
• 蒷ectricit?de France ( EDF ) developed a system called " spread frequency shift keying " or S-FSK . See IEC 61334.
• They transmit binary digital data by modulation methods such as frequency shift keying ( FSK ) allowing portable digital devices to communicate via wireless networks.
• Gaussian Frequency Shift Keying ( GFSK ) modulation is used : the binary one is coded with a frequency increase by 288 kHz, and the binary zero with frequency decrease of 288 kHz.
• Digital systems typically use data rates in the 1, 200 19, 200 kilobit-per-second rates and may employ modulation schemes such as frequency shift keying, audio frequency shift keying, or quadrature phase shift keying to encode characters.
• Digital systems typically use data rates in the 1, 200 19, 200 kilobit-per-second rates and may employ modulation schemes such as frequency shift keying, audio frequency shift keying, or quadrature phase shift keying to encode characters.
• Modems are generally classified by the amount of data they can send in a given audio frequency shift keying with two possible frequencies, corresponding to two distinct symbols ( or one bit per symbol ), to carry 300 bits per second using 300 baud.
• The FCC Notice of Proposed Rule Making ( NPRM ) that resulted in the authorization of Frequency Shift Keying ( FSK ) in the amateur high frequency ( HF ) bands responded to petitions by the American Radio Relay League ( ARRL ), the National Amateur Radio Council and Mr . Robert Weinstein.
• The large VLF antennas used for high power transmitters usually have bandwidths of only a few tens of hertz, and when transmitting frequency shift keying ( FSK ), the usual mode, the resonant frequency of the antenna must sometimes be dynamically shifted with the modulation, between the two FSK frequencies.
• This guyed mast, which is probably still the tallest structure in Hungary, is currently being used for power-distribution control data transmission at 135.6 kHz with a power of 100 kW; the data bursts are at 200 baud with + /-170 Hz FSK ( Frequency Shift Keying ).
• Digital communication systems : pulse code modulation ( PCM ), differential pulse code modulation ( DPCM ), delta modulation ( DM ); digital modulation schemes-amplitude, phase and frequency shift keying schemes ( ASK, PSK, FSK ), matched filter receivers, bandwidth consideration and probability of error calculations for these schemes.