Sunday, March 16, 2014

What Happens Behind OCXO 10Mhz Frequency Reference

By Gwen Lowe


It is extremely important to keep both the crystal and circuitry in a controlled structure so as to manage temperature sensitivity. This is what denotes a stable temperature, which ought to be higher than the one responsible for exposing OCXO 10MHz Frequency Reference. Better still; the oven can perform better if it is set to turnover resonators degree to give it the capability of balancing with the outside 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.

These oscillators know how to enable stability as compared to others like SPXO and TCXO which do not have any temperature control mechanisms. It is the crystal units that determine temperature characteristics. Oven controlled oscillator is far much better because the oven block enables it to maintain the temperature at a stable state.

It is the dynamic and static characteristics that bring about stability. Things like the accuracy of the oven, the resonator and even some other components are responsible for the kind of stability you can get. It is at a certain recommended range that this temperature stability can perform within. The narrow ranges are better placed as it allows restriction to the needed area.

The oven controlled oscillator needs more power in terms of consumption because it takes a long time to warm up. It is the kind of insulation used that majorly determines the power needed to be used for oven heating. If it is high, the heat usage will be reduced and this results in usage of less power.

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.

Proper regulation should also be carried out so that the voltage supply does not have any variations. If not checked, then disturbances may be noticed within oscillator frequency and this could hinder its performance. Difference in power if realized can cause delay and let the supply go back to equilibrium, leading to wastage of more time.

Since the oscillator is sensitive to load, an amplifier could be used so that multiple outputs can be obtained. This is the reason why they should be built around the oven so that temperature stability does not interfere so much. Humidity also needs to be checked because it could have some impact on the stability.

Such issues may be averted by measuring instability and modelling it to the required standards. Control mechanisms are also available and can be used for the better to avert instability. Temperature compensation can be achieved through such mechanisms. Additional characteristic like retrace is another option which can be applied for these aversion purposes.




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