4 Tips for Choosing an OCXO OC3627

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4 Tips for Choosing an OCXO OC3627.

When it comes to selecting an oscillator for precise frequency control, crystal oscillator modules (OCXOs) are an excellent option, and the OC3627 is a popular choice for its superior performance. However, choosing the right OCXO is crucial for achieving desired results. Here are four tips to help you select the right OC3627:

1. Frequency Stability.

One of the most critical factors to consider when selecting an OC3627 is frequency stability. The frequency stability of an oscillator refers to the extent to which the frequency of the output signal remains constant over time. A highly stable oscillator will have an almost unchanging output frequency, while a less stable oscillator will have slight fluctuations. An OCXO with a frequency stability of +/- 5 x 10-11 would be a reliable choice.

2. Temperature Stability.

Temperature stability is another crucial factor to consider when selecting an OC3627. The oscillator's frequency is impacted by temperature, and not all oscillators are equally affected. The temperature stability of the oscillator describes the extent to which changes in temperature result in drift in the oscillator's output signal frequency. To minimize frequency drift due to temperature changes, look for an OCXO with a low temperature coefficient of frequency (TCF).

3. Aging.

An oscillator changes over time due to aging, meaning that its frequency will drift over time, even if the temperature remains unchanged. Aging refers to the deterioration of an OCXO's performance over time, and it is a measure of how much the oscillator's output frequency changes as it ages. A reliable OC3627 should have low aging characteristics to maintain consistent performance over an extended period.

4. Phase Noise.

Phase noise is a significant parameter to consider when selecting an OCXO, particularly in applications such as telecommunication and military communication systems, where low phase noise is critical. Phase noise refers to the small, random fluctuations that occur in an oscillator's output signal. An OCXO's phase noise is measured in dBc/Hz, with lower numbers indicating better performance. Low phase noise is essential for accurate, low-jitter timing signals.

In conclusion, selecting an appropriate OCXO for your specific application involves taking into account several factors. The frequency stability, temperature stability, aging, and phase noise of an oscillator are all crucial parameters to consider when selecting an OC3627. By following these four tips, you can ensure that you choose an OCXO that meets your performance requirements.

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