The situation where a wireless network signal barely penetrates walls or is completely lost in a distant room is familiar to many home and office network administrators. Equipment owners MikroTik Often, users encounter the problem that the default radio module settings are limited by country-specific regulations, which prevents antennas from fully exploiting their potential. Increasing transmitter power is the first and most obvious step when trying to expand coverage.
However, blindly increasing parameters without understanding the physical limitations can lead to network instability or even equipment damage. In this article, we'll cover more than just software configuration methods. tx-powerWe'll also touch on antenna selection and proper device positioning. Proper setup allows you to achieve a high-quality signal in previously "dead zones."
It is important to understand that the equipment RouterOS has flexible tools for managing the radio frequency spectrum. We will look at working with the package wireless for old versions and the new package wifiwave2 or wifi-qcom For current models. Proper configuration will ensure a stable connection for all your devices.
Legal Restrictions and Country Profile
The first step in the optimization process should always be checking the installed country profile. Communication protocols strictly regulate the maximum transmit power and available channels for each geographic zone. In the MikroTik interface, these parameters are stored in the field Country inside the wireless interface settings.
If you select the "United States" or "no_country_set" profile, you may have access to a wider power range, but this will be a violation of local laws. Using illegal profiles can result in interference with service frequencies and fines from the regulator. Always begin by reviewing the available options in the drop-down list.
⚠️ Attention: Setting the "no_country_set" profile or selecting a foreign jurisdiction removes software power restrictions, but makes the device illegal to use in your country. Use these methods only for testing in shielded areas (Faraday cages).
To legally increase your coverage, it's best to use channels with the least amount of noise permitted in your country. Sometimes, changing a channel from a busy one to a clear one can provide a greater increase in actual speed than simply increasing transmitter power. Analyze your environment before making any changes.
Setting Tx-Power and Antenna Parameters
Direct power adjustment is carried out via the parameter tx-powerIn older versions of RouterOS (wireless package), the value is often specified in dBm, where every 3 dBm increase doubles the power. In newer interfaces, settings may be presented as levels or percentages, depending on the specific device model.
When using external antennas, it's critical to specify the correct gain in the settings. If you connect an 8 dBi antenna but leave the router settings at 0 dBi, the calculated effective radiated power (EIRP) will be incorrect. This can lead to channel asymmetry, where the client sees the router but is unable to respond.
To change the settings, go to the menu Wireless, select the desired interface and open the tab TX PowerHere you can set a fixed value or leave the mode auto, which allows the system to dynamically manage power depending on load and distance to the client. Manual settings often produce more predictable results under static conditions.
Remember that the maximum power is limited not only by software but also by hardware. Attempting to set a value higher than the chip's physical limit will result in the router ignoring the command or resetting it to the maximum possible. Always consult your device's datasheet.
☑️ Checking power settings
Differences between Wireless and WifiWave2 packages
The MikroTik ecosystem is going through a transition period, which is creating confusion in settings. The old package wireless It's used on most classic devices (hAP ac2, cAP ac, LHG series, etc.) and supports standards up to Wi-Fi 5 (802.11ac). The power settings are in the familiar location and work predictably.
New devices with Wi-Fi 6 (802.11ax) and Wi-Fi 7 support often require the installation of packages wifiwave2 or wifi-qcomThese packages feature a completely redesigned settings architecture. Power parameters can be distributed across different tables, and control is achieved through more complex configuration profiles.
In the package wifiwave2 Antenna and power settings are often tied to specific frequency bands (2.4 GHz and 5 GHz) separately. This allows for more flexible spectrum management, but requires the administrator to have a deeper understanding of the underlying physics. Configuration errors here can lead to complete radio module shutdown.
⚠️ Attention: The interfaces and parameter names in the wifiwave2 and wifi-qcom packages may differ from those in classic wireless. Implementation details depend on the RouterOS version and the specific Qualcomm or MediaTek chip model.
If you've updated to a new OS version and the settings are missing or grayed out (inactive), check which package is installed. You may need to change the configuration or install additional licenses to unlock certain frequency bands.
Why are the settings grey?
If the settings fields are locked (grayed out), check whether the "AP with limited rights" mode is enabled or whether the provider is blocking the network (in the case of leased equipment). Settings may also be unavailable if the interface is in an error state.
Power and distance correspondence table
Understanding how power affects range is essential for proper network planning. Below is a sample table showing the relationship between signal strength and range under line-of-sight conditions for a standard antenna.
| Power (dBm) | Level (mW) | Distance (open) | Signal quality |
|---|---|---|---|
| 20 dBm | 100 mW | up to 30 meters | Excellent |
| 23 dBm | 200 mW | up to 45 meters | Good |
| 26 dBm | 400 mW | up to 60 meters | Average |
| 30 dBm | 1000 mW (1W) | up to 100 meters | Low (noise) |
It's worth noting that these figures apply to ideal conditions. In reality, walls, furniture, and even people can affect the signal by absorbing and reflecting it. A 3 dBm increase in power doesn't always double the effective coverage area in a building with concrete floors.
Furthermore, high power on the router side creates an echo problem. The client device (smartphone) has a weak antenna and can't reach the router in response, even if the router is blaring very loudly. Therefore, cranking up the router's power to maximum is pointless if the clients are far away.
Overheating and stability issues
Increasing the transmitter power directly impacts the chip's heat output. Operating at extreme values tx-power
Symptoms of overheating often don't appear immediately, but after several hours of operation under load. If you notice an increase in latency or intermittent connection drops after increasing power, first check the device's temperature. WinBox This can be done through the menu System -> Health.
To mitigate the consequences, you can use automated control scripts. For example, you can set up a rule that reduces power when a critical temperature is reached. This will extend the life of your equipment and keep the network available.
:local temp [/system health get temperature]:if ($temp > 70) do={
/interface wireless set wlan1 tx-power=15
} else={
/interface wireless set wlan1 tx-power=25
}
This script is an example of simple protection logic. In real-world conditions, it's important to take into account heating inertia and avoid switching too frequently to avoid "chattering" of the settings.
Alternative methods for expanding coverage
If cranking the power to maximum doesn't produce the desired result, the problem lies not in signal strength, but in the physics of radio wave propagation or receiver sensitivity. In such cases, other methods, such as installing an external high-gain antenna, are more effective.
Replacing standard antennas with directional ones (such as panel or parabolic antennas) allows you to focus the radiation energy in the desired direction, ignoring empty spaces. This has a much greater effect than simply increasing the power of an omnidirectional emitter.
It's also worth considering setting up a mesh network or installing an additional access point (CAP) connected via cable. This will create a single, seamless network with 100% coverage, something that's impossible to achieve with a single router, no matter how powerful.
Can I use a signal booster?
Using external power amplifiers (boosters) with MikroTik is possible, but requires installing attenuators on the receiver input to prevent damaging the router's sensitive electronics with a powerful return signal. This solution is for advanced users.
Frequently Asked Questions (FAQ)
Why did the internet speed drop after increasing the power?
You've likely caused significant interference to yourself or your neighbors, or your device has throttled due to overheating. High power can also blind the router's receiver with strong reflected signals.
What is the maximum power permitted in the Russian Federation?
For the 2.4 GHz band, the effective radiated power (EIRP) for indoor access points must not exceed 100 mW (20 dBm). Exceeding these limits may result in administrative penalties.
Does antenna gain affect actual power?
Parameter antenna-gain In MikroTik settings, this parameter is purely informational for calculating EIRP and ensuring compliance with regulations. It doesn't physically boost the signal unless an external antenna is connected, but it does affect the logic of the power control algorithms.
Should I enable Turbo mode in Wireless settings?
Turbo mode (or Superchannel) allows channel aggregation, increasing throughput, but often requires power reduction to maintain the spectrum mask. In noisy environments, this can have the opposite effect.