Frequency references are devices that are used in giving different frequencies that are steady in one way or another. There are very many kinds of these instruments found worldwide, for instance the acoustic ones like the tuning forks and the electrical ones are often used in producing signs of particular occurrences.
Those that are known to be very steady are those of caesium value. Some of its make are the caesium fountain and the hydrogen masers. The caesium type is very well known to have a period stability that is long and of good quality. The hydrogen maser on the other hand has a time performance which is short. This is why the caesium standards and the hydrogen masers are used together so that they may bring out two great performances.
The atomic physics has set the standards for accuracy and stability in precision occurrences reference packages across the world. The hydrogen, quartz oscillators, the rubidium standards and cesium have been used to support a number of military communications, the satellite post and test applications that any type of reference.
More than fifty transmitters are placed throughout the north side of the Hemisphere by the US Guard. The timing of such transmitters is controlled by clocks of cesium which are found at every point with a transmitter. The distribution amplifiers extract the timing data from the signal transmitted and then uses it to frequency lock the high steady oscillator. This results into a 50 MHz output signal that has an equal stability with the caesium clock.
The distribution amplifier creates the flexibility needed for the distribution indications from output high level frequency standards. Low level distortion and the perfect isolation make it convenient for provision of multi-outputs from atomic frequency units. The input channels will allow 10MHz reference or even 50MHz.
Since the distribution amplifier is modular, one can easily configure it from a number of distribution needs by use of appropriate combinations of the output and input modules. Minimal talk and crosstalk is ensured through the shielding of each input and output plug in amplifier. The outputs that have been tuned provide signals that are clean and also high channel to channel isolation.
Research that is advanced in nature, the cutting edge electronics engineering and also the software designs that are integrated have all resulted to development of frequency references. These have precise standards that deliver performances that exceptional. They have unsurpassed accuracy, reliability and stability even in most challenging environments. Most of the complex electronics need stable and highly accurate time base.
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