standard frequency การใช้

• Much later, the use of standard frequencies allowed interconnection of power grids.
• A standard frequency used by an ultrasonic thickness gauge is 5 MHz.
• The standard frequencies used with ultrasonic sonotrodes range from 20 kHz to 70 kHz.
• Root-mean-square sound pressure being obtained with a standard frequency weighting and standard time weighting.
• The Lauffen-Frankfurt link in 1891, AEG raised their standard frequency to 50 Hz in 1891.
• In the electricity sector in Japan, the standard frequencies for AC are 50 and 60 Hz.
• Standard frequency and time stations, such as WWV, will also send QSL cards in response to listeners reports.
• This transmitter was decommissioned in 1956 and became the time signal transmitter standard frequencies for scientific reference purposes.
• These new phones let you roam much farther than the 46 to 49 MHz models, the current standard frequency.
• Remnant fragments of older systems may be tied to the standard frequency system via a rotary converter or static inverter frequency changer.
• The new phones cost between $ 175 and $ 350, compared to $ 100 or so for a good standard frequency cordless model.
• The following sound isolation results and methodologies are presented with data that is measured within the standard frequency range specified by appropriate ASTM standards.
• Since the late 1970s, the use of synthesized, microprocessor-controlled radios, and widespread adoption of standard frequency splits have changed the way repeater pairs are described.
• Early AC systems used the standard frequency of 400 Hz, which limited alternators to two pole rotors and a maximum rotation speed of 24, 000 rpm.
• The change will be made at 2 a . m . Sunday ( 2300 GMT Saturday ) on orders from Russia's Time and Standard Frequencies Commission.
• Sixty Hertz is now the standard frequency of electric power in North America, though the old 25 Hertz power distribution was more efficient, having less losses.
• The German Verband der Elektrotechnik ( VDE ), in the first standard for electrical machines and transformers in 1902, recommended 25 Hz and 50 Hz as standard frequencies.
• The output of the photodetector is a standard frequency modulated ( FM ) signal, with the Bragg cell frequency as the carrier frequency, and the Doppler shift as the modulation frequency.
• Eventually culminating in the individual oscillations of a wave of light of a standard frequency . ( See second ) . talk ) 23 : 30, 1 September 2011 ( UTC)
• These two effects provide a standard electrical resistance and a standard frequency, respectively, which are believed to measure the charge of the electron with corrections that are strictly zero for macroscopic systems.