Precision 60 Hz Oscillators

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  • Viscosity and molecular weight distribution of ultrahigh molecular weight polyethylene using a high temperature low shear rate rotational viscometer
    The reference for the amplifier is a precision 60 - Hz oscillator stabilized for both frequency and amplitude to better than 0.1%.
  • Design of the Advanced Light Source timing system
    There are 4 clocks utilized in the timing system, all but one (line sync) are derived from the 500 MHz (499.654 MHz to be precise ) RF Master Oscillator : 60 Hz - Derived from power line, used to establish basic repetition rate of …
  • 1981 Pioneer Award
    Both stations employed precision tuning fork oscillators that produced 60 Hz power to drive the noise wheels; they exhibited adequate phase stability, so that once synchronized, the wheels would stay in phase ivith each other for a sufficiently long time interval, even …
  • Aging Management Guideline for commercial nuclear power plants: Battery chargers, inverters and uninterruptible power supplies. Final report
    Inverter output frequency is held at a constant 60 Hz by a low-level precision oscillator , or it is varied to enable synchronization of the output voltage with some alternate AC power source.
  • A reliable ionosonde for continuous automatic operation
    A 120 kHz crystal oscillator is divided down to 60 Hz and this precision -frequencyvoltage is used to drive the synchronousclock motor of a simple cam-operated sequence timer.
  • Ambulatory Impedance Cardiography
    … and RSA for hear rate variability, and skin conductance • User-selectable sampling frequency: 500 or 1,000 Hz • Source current specifications: 0.4 mA • Precision oscillator : l00 kHz sinus waveform • Built in 60 Hz hardware notch filter for …
  • The measurement of optical frequencies
    Control 50 355– 60 [158] Young B C, Cruz F C, Itano W M and Bergquist … … L 2000 Improved short-term stability of optical frequency standards: approaching 1 Hz in 1 s with … … to an optical reference oscillator Opt. Lett. 28 663–5 … … Wadsworth W J and Russell P S J 2000 Optical frequency synthesizer for precision spectroscopy Phys. Rev …
  • MEMS technology for timing and frequency control
    Although the described micromechanical resonator os- cillators are expected to achieve excellent phase noise per- formance at carrier offsets greater than 100 Hz , and micro- oven control might soon allow them to reach temperature stabilities down to 10−9 (and maybe even better … But unless atomic clocks with stability better than 10−11 over one hour can be shrunk from the 9,000-cm3 , 60 -W commercial units existing today, down to a … … electronic systems (which rely on the accuracy and precision of atomic clocks) will …
  • Proposal for measurement of earth impedance using variable frequency injection
    With the noise source set to zero, the precision source oscillator was adjusted to a frequency of 52 Hz . … both lock-in amplifiers were swept over a frequency range from 40 to 60 Hz at intervals …
  • Earthquake seismograph development: A modern history—Part 2
    The upper row of modules, from left to right, are (1) crystal oscillator with control to adjust … The lower modules are (1) power amplifier to deliver precision 60 Hz for recorder drives, (2) input power (24-V dc) distribution and control module with speaker, (3) crystal-frequency divi­ der chain.