Compact Sealed Online Monitor vs Board Packaged Monitor: Finding the Ideal Fit for Your Needs

Posted on Mar 29, 2024 by

In today's rapidly evolving technological landscape, the demand for efficient monitoring solutions across various industries is at an all-time high. Amidst the plethora of options available, two contenders have emerged as frontrunners: compact sealed online monitors and board packaged monitors. Each offers unique features and benefits, but determining the optimal choice for your specific requirements can pose a significant challenge. In this article, we'll delve into the characteristics of both monitor types and explore how to identify the ideal solution tailored to your needs.

Sealed Online Monitor

Sealed Online Monitors are specialized devices tailored for fiber optic systems, often integrated into communication setups. These monitors feature a sleek sealed design with both fiber optic input and output. Their main purpose is to provide real-time monitoring of the average output power from Erbium-doped Fiber Amplifiers (EDFAs). This monitoring is enabled by their exceptional attributes, such as low optical insertion loss (typically less than 1 dB) and high return loss (e.g. > 50 dB). By continuously monitoring output power, these devices can automatically adjust the drive current of the fiber amplifier's pump diodes, ensuring a consistent output power level. This design is aimed at mitigating pump diode aging or fluctuations in input power, while also rapidly identifying any system defects.

Board Packaged Monitor

Board Packaged Monitors typically feature a board-like structure for packaging, designed to be compact and easily installable within racks or equipment. Their primary function is to measure and analyze various performance metrics of fiber optic networks, such as optical power levels, signal quality, and system integrity. Equipped with sensors and detectors, these monitors capture optical signals and convert them into measurable data. By processing and analyzing this data, operators gain real-time insights into the operational status of the network, allowing them to promptly identify and address potential issues.

Sealed Online Monitors vs Board Packaged Monitors

Navigating the landscape of network performance assessment, understanding the differences between Sealed Online Monitors and Board Packaged Monitors is crucial for making informed decisions.

  • Sealed Online Monitors focus on identifying system defects such as aging pump diodes or input power fluctuations, while Board Packaged Monitors prioritize delivering comprehensive network performance assessment and fault diagnosis for complex network environments.

  • Sealed Online Monitors primarily monitor the output power of fiber optic amplifiers, whereas Board Packaged Monitors offer a broader range of monitoring capabilities, including optical power, signal quality, bit error rate, and wavelength.

  • Board Packaged Monitors, equipped with multiple sensors and detectors, provide a more comprehensive and accurate view of network operations through advanced data processing and analysis compared to Sealed Online Monitors, resulting in a greater advantage in identifying system defects and addressing potential issues.

  • Sealed Online Monitors typically lack directional sensitivity, providing straightforward monitoring unaffected by light propagation direction, while Board Packaged Monitors may possess directional sensitivity, enabling targeted detection of light propagation in specific directions.

  • Sealed Online Monitors offer instant display of current optical power in milliwatts or dBm, ensuring ease of use, whereas Board Packaged Monitors provide flexible integration into network equipment or standalone installation, enhancing user adaptability.

  • Some models of Sealed Online Monitors come with integrated data recorders for logging previous power values and relevant information, whereas Board Packaged Monitors typically incorporate built-in data recording capabilities for storing historical data, facilitating further analysis and troubleshooting.

FS Board Packaged Monitor

The table below displays the specific parameters of different board types of monitors in the FS FMT series. Additionally, FS offers customized OPD services to meet your personalized network requirements. Make FS your preferred partner and benefit from professional support and tailored solutions for your network operations.


Compact Sealed Online Monitor vs. Board Packaged Monitor: Finding the Ideal Fit for Your Needs

Compact Sealed Online Monitor vs. Board Packaged Monitor: Finding the Ideal Fit for Your Needs

Wavelength Range
Channel Power Accuracy
Power Consumption
Channel Optional
4 channels
1 channel
Monitor Online, Simple Management Tool, Monitor Cable
Monitor Online, Simple Management Tool
Pluggable Module
(Occupies 1 slot in FMT chassis)
Pluggable Module
(Occupies 2 slots in FMT chassis)


In today's fast-paced technological landscape, selecting the right monitoring equipment is crucial for ensuring smooth and reliable network operations. By carefully evaluating the specific parameters and capabilities of Sealed Online Monitors and Board Packaged Monitors, organizations can make informed decisions tailored to their unique needs. With FS's dedication to delivering state-of-the-art monitoring solutions and customizable services, businesses can harness advanced technology to enhance network performance, proactively identify potential issues, and maintain uninterrupted operations. Embracing these innovative monitoring solutions isn't just a strategic move; it's a practical approach to fully optimizing your network infrastructure's capabilities.

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