Friday, March 21, 2014

Technology Behind OCXO 10Mhz Frequency Reference

By Gwen Lowe


In here, the crystal and the circuitry responsible for temperature sensitivity have to be kept in a controlled structure. This ensures that it is in a stable condition of temperature, which should be higher than that ambient temperature necessary for exposing OCXO 10MHz Frequency Reference. In fact, it is better if the oven is set to turnover temperature of the resonators so that it balances with the external temperature.

If the temperature is controlled, then anomalies associated with temperature effects will be reduced to minimal. These temperature anomalies have effects on the resonators and may just allow compensation within a limited allowance. Higher overtone crystals may also be used in such controlled temperatures. This is better because they are stable in controlled conditions.

Stability can be enabled with these oscillators even more that it can be with those ones like SPXO and TXCO. These usually have no mechanisms for temperature control. The crystal units are the ones which determine the characteristics of the temperature. The oven controlled oscillator is rather better since the oven block is what maintains and controls the temperature as required.

Its stability is majorly resulting from both the static and dynamic characteristics. These could be on the resonator, the range of the design temperature and stability of other components such as the oven accuracy. Even though temperature stability works in a given range, narrow ranges give improved stability because lots of it is restricted and channelled to a specific section.

More power needs to be considered for the oven controlled oscillator because its consumption is enormous. Depending on the insulation kind, you will be able to determine the power needed for such operations. The higher it goes, the lesser heat used, which in turn helps in usage as minimal as possible.

It is the oven temperature that is set first to some higher degrees of temperature more than the normal ambient one. This is just to enable the oven have a good control in place. After this, is when you warm the resonator to attain some amount of heat up front. This is what caused equilibrium balancing.

Regulation is also necessary to avoid variations of voltage supply. If this happens, then disturbances are likely to be created within the oscillator frequency. This results from the difference in the power and may end up taking quite a long time to go back to equilibrium.

Oscillator is known to be load sensitive and engaging amplifier functions could help out in giving multiple outputs. They should in fact be built near the oven so that stability of the temperature does not become a hindrance. Humidity can impact on the stability and that is why it needs to be checked.

Even if this may be the case, instability can be measured and can also be modelled in order to avert these temperature issues. There are also control mechanisms that can be used to control any error and avert instability. Such mechanisms can also help further by giving temperature compensation and effective aging. Additional characteristic series such as retrace can also be considered to avert such situations.




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