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In the field of optically isolated measurement, understanding the key performance parameters of the equipment is essential for selecting the right measurement device. An optical isolator is a device used for optical signal transmission that ensures the signal can travel in only one direction, thereby preventing reflections and echoes from affecting the system. So, what are the main performance parameters of optically isolated measurement?
1. Isolation and common-mode rejection ratio (CMRR)
Isolation is one of the key performance parameters of an optical isolator; it represents the ratio of transmission loss in the two directions. The higher the isolation, the better the isolator's performance. Isolation is typically expressed in decibels (dB), and optically isolated probes can achieve at least -160 dB. In practice, the isolation of an optical isolator should be selected according to the specific requirements of the system.
2. Signal bandwidth
Signal bandwidth refers to the difference between the highest and lowest frequencies of the harmonics contained in a signal—that is, the frequency range the signal occupies. For example, consider a square wave formed by superimposing several sine waves; its lowest frequency component is its fundamental frequency. Optically isolated probes range from 200 MHz to 1.5 GHz.
3. Temperature stability
Temperature stability refers to how stable the isolator's performance is across different temperatures. The better the temperature stability, the smaller the performance variation of the isolator across temperatures. In practice, an optical isolator with good temperature stability should be selected according to the specific requirements of the system.
4. Voltage withstand capability
Voltage withstand capability refers to the isolator's ability to operate in high-voltage environments. The better the voltage withstand capability, the more stable the isolator's performance under high voltage. In practice, an optical isolator with good voltage withstand capability should be selected according to the specific requirements of the system.
5. Service life
Service life refers to how long an optical isolator can operate continuously under normal operating conditions. The longer the service life, the higher the isolator's reliability. In practice, an optical isolator with a long service life should be selected to ensure long-term stable operation of the system.
6. Accuracy and delay
High-accuracy measurement requires the sensor to maintain high-accuracy data acquisition across the full range over extended periods, typically with accuracy better than 1%.
7. Compatibility
Optically isolated probes are usually expensive, and if a probe's versatility is limited, it can greatly affect the customer's user experience and cost investment. The PMK FIREFLY FF-1500 is the world's first high-performance general-purpose optically isolated probe with a fanless design. For more information, please contact our selection engineers directly.
What are the main performance parameters of optically isolated measurement? Understanding the main performance parameters of optically isolated measurement is crucial for selecting the right optical isolator. In practice, an optical isolator with suitable performance parameters should be selected according to the specific requirements of the system. If you have any questions about the performance parameters of optical isolators, you are welcome to consult the website customer service of Ligao Jiechuang.
