"' Rakon Limited "'is a technology company founded in 1967 that designs and manufactures frequency control products, primarily quartz crystals and temperature-compensated crystal oscillators ( TCXO ), oven controlled crystal oscillators ( OCXO ) and voltage controlled crystal oscillators ( VCXO ).
42.
It occurred to Haydon that it might just be possible to combine the principles of simple harmonic motion normally used in clocks or watches and still have the clock operate from the power of the local utility company, but independent of the inaccurate frequency control.
43.
Shortages of crystals during the war caused by the demand for accurate frequency control of military and naval radios and radars spurred postwar research into culturing synthetic quartz, and by 1950 a hydrothermal process for growing quartz crystals on a commercial scale was developed at Bell Laboratories.
44.
Usually, the model club itself will possess some sort of " transmitter impound " facility at their modeling site for secure storage of the modelers'transmitters when not in active use while visiting the facility, and usually provides some sort of fixed " frequency control board " nearby to the impound area.
45.
In 1995, at the start of the dot-com bubble, Hicks left Covington & Burling, relocating to Waltham, Massachusetts, and joining Oak Industries, a company founded by a friend from the Navy Office of General Counsel, William Antle III, that provided broadband networks, frequency control devices and fiber-optic components to the telecommunications industry.
46.
Electric and electronic instruments and amplifiers enabled performers and producers to change the tone and sound of instruments using the preamlifier controls ( to add distortion or overdrive to the tone ), use the frequency controls to alter the tone, and use effects units to add reverb, flanging, phasing, chorusing, and many other sounds.
47.
The reference oscillator provides a stable time base for the system and determines the frequency accuracy of the DDS . It provides the clock to the " NCO " which produces at its output a discrete-time, sinusoid ) whose period is controlled by the digital word contained in the " Frequency Control Register ".
48.
As the emerging multitude of 2.4 GHz band spread spectrum RC systems usually use a FHSS that do not stay on one set frequency any longer while in use, the older " exclusive use " provisions at model flying sites needed for VHF-band RC control systems's frequency control, for VHF-band RC systems that only used one set frequency unless serviced to change it, are not as mandatory as before.
