Selecting the Right Coaxial Cable for MikroTik Wireless Networks: LMR400 vs. LMR195

When utilizing MikroTik RouterBOARD wireless equipment, the choice of coaxial cable—LMR400 or LMR195—is pivotal in optimizing network performance and equipment efficiency. Given MikroTik's typically low radio power output, understanding the practical lengths for these cables, their loss per meter, and when amplification might be necessary is crucial for maintaining signal integrity and network reliability. This guide will navigate the practical applications of LMR400 and LMR195 cables in MikroTik wireless setups, focusing on optimizing your network's performance.

Practical Applications of LMR400 and LMR195

LMR400: The Choice for Longer Distances

LMR400 is renowned for its low-loss characteristics, with an attenuation of approximately 6.8 dB per 100 meters at 2.4 GHz, making it the preferred option for longer cable runs. In the context of MikroTik wireless equipment, which often operates at lower power outputs, LMR400 can be effectively used for distances up to 100 meters without significant signal degradation. This makes it ideal for outdoor installations where devices like high-gain antennas need to be connected over considerable distances.

When to Consider Amplification

For MikroTik deployments where cable runs exceed 100 meters, signal loss becomes a critical concern that can impact network performance. In such scenarios, using inline RF amplifiers may become necessary to boost the signal strength, ensuring that the lower power output of MikroTik radios does not result in suboptimal connectivity.

LMR195: Suited for Shorter, Flexible Installations

LMR195, with its higher attenuation rate of approximately 17.7 dB per 100 meters at 2.4 GHz, is more suited for shorter distances, typically recommended for up to 30 meters when used with MikroTik equipment. Its flexibility makes it a great choice for indoor applications or where equipment is closely spaced, such as within a single building or on a shared mast with multiple devices.

Amplification Considerations

While amplification is less commonly needed with LMR195 due to its intended use for shorter runs, careful signal strength evaluation is crucial. Ensuring that the cable length does not adversely affect the network performance is key, especially when deploying lower-powered MikroTik radios.

Maximizing Network Efficiency

Signal Loss and Cable Length

Understanding the relationship between cable length, signal loss, and the attenuation rates for LMR400 and LMR195 is fundamental. Longer cable runs inherently result in higher signal attenuation, this is where LMR400's lower loss per meter provides a distinct advantage over LMR195. However, the specific requirements of your MikroTik deployment distance between network points, environmental conditions, and required signal strength will dictate the most suitable cable type.

Installation Best Practices

• Evaluate Network Requirements: Assess the distance, environmental factors, and power output of your MikroTik equipment to choose the appropriate cable.
• Minimize Cable Length: Opt for the shortest possible cable runs to reduce potential signal loss, especially when using LMR195.
• Consider Future Expansion: Planning for future network expansion can influence whether LMR400 or LMR195 is more appropriate for your current installation.

Conclusion

Choosing between LMR400 and LMR195 for MikroTik wireless networks hinges on balancing the need for signal integrity with practical installation constraints. LMR400's low-loss properties make it ideal for longer outdoor connections where MikroTik's lower radio power output might otherwise limit network performance. Conversely, LMR195's flexibility suits shorter, indoor applications where space constraints and proximity of devices play a significant role. In all cases, assessing the need for signal amplification based on cable length and network demands is crucial for ensuring optimal performance and reliability of your MikroTik wireless network.