Modern wireless networks often become a source of problems when connection speeds drop for no apparent reason. Many users are unaware that the router's default settings, as set by the manufacturer, may not reflect the actual situation in a particular home or office. Wi-Fi frequency in Hertz — this is one of the key parameters that directly affects the signal stability and maximum channel throughput.
In most cases, routers automatically select the best operating option, but in densely populated areas or when there are a large number of neighboring networks, the automation often makes mistakes. Interference Signal interference can cause your laptop or smartphone to constantly jump between frequencies or lose data packets. Understanding how to manually switch your router to the 50Hz (5 GHz) band or optimize for 20Hz (2.4 GHz) can dramatically improve your connection quality.
This article will help you understand the intricacies of frequency range settings. We'll cover not only the theoretical aspects but also practical steps for changing settings in the web interface of various equipment models. You'll learn to determine which operating mode is required for your specific situation and how to independently eliminate bottlenecks in your home network.
Differences between the 2.4 GHz and 5 GHz bands
Before making any changes to the settings, it is important to clearly understand the physical difference between the two main frequency ranges. Range 2.4 GHz is an older and more widespread standard. Its main advantage is excellent penetration: the signal easily passes through walls and ceilings, covering a large area. However, this range is heavily congested, as it is used not only by Wi-Fi routers but also by Bluetooth devices, microwave ovens, and cordless phones.
On the other hand, the range 5 GHz (often referred to as 50 Hz) offers significantly higher data transfer rates. It is less susceptible to interference because it has a much larger number of free channels. MU-MIMO technology, which operates primarily at this frequency, allows for simultaneous data transmission to multiple devices without any loss of speed. However, there is a significant drawback: the 5 GHz signal's range is significantly shorter, and any obstacles such as walls weaken it significantly.
Choosing between these two standards depends on your priorities. If you need to cover a large house with thick walls, 2.4 GHz may be the only viable option. However, if you're in the same room as the router and playing online games or watching 4K video, switching to 5 GHz will provide a significant performance boost.
⚠️ Note: Some older devices (smartphones over 7-8 years old, early versions of IoT devices) do not physically support the 5 GHz band. Before switching, make sure your equipment is compatible with the new standards.
Preparing to change router settings
To make changes to the frequency configuration, you will need to access the router's administrative panel. This can only be done from a device connected to the router's network. It is best to use a computer or laptop connected via LAN cable, because during the process of changing the frequency, the wireless connection may be interrupted and you will lose access to the setup interface.
You need to know the gateway IP address. In most cases, this is 192.168.0.1 or 192.168.1.1, however, manufacturers may use other addresses. You will also need an administrator login and password. If you've never changed these details, they'll be found on a sticker on the bottom of the router. Standard combinations are often admin/admin or admin/password.
☑️ Preparing for setup
Open any browser and enter the IP address in the address bar. After entering your credentials, you will be taken to the main menu. Interfaces vary by manufacturer (TP-Link, ASUS, Keenetic, MikroTik) look different, but the logic behind the sections remains the same. Look for tabs named "Wireless," "Wi-Fi," "Wireless Network," or "Radio Network."
⚠️ Note: Firmware interfaces are updated regularly. The location of menu items may differ from that described in the instructions. If you cannot find the desired setting, consult the official documentation for your specific router model on the manufacturer's website.
How to change the frequency in the router's web interface
The process for changing the Hertz frequency varies depending on the equipment model, but the general steps remain the same. After entering the control panel, find the section responsible for wireless settings. It's usually called Wireless or Wi-Fi SettingsWithin this section, you need to find the parameter responsible for selecting the range or operating mode.
Modern dual-band routers often have a function implemented Smart Connect (or similar), which combines 2.4 GHz and 5 GHz networks under a single name. In this case, the router automatically decides which frequency the client will use. To force frequency selection, this feature must be disabled. Once disabled, two separate settings lists will appear: one for 2.4 GHz and one for 5 GHz.
To switch to 50Hz (5GHz), select the appropriate subsection. Make sure the option is checked. Enable Wireless (Enable Wireless) is enabled. Some models offer a choice of "5 GHz Only" or "Mixed" modes. Selecting "5 GHz Only" ensures that the device won't attempt to switch to a slower frequency when the signal degrades.
| Parameter | 2.4 GHz band | 5 GHz band | Recommendation |
|---|---|---|---|
| Maximum speed | Up to 450 Mbps | Up to 1300+ Mbps | For 5 GHz |
| Penetration ability | High | Low | For 2.4 GHz |
| Channel congestion | High | Low | For 5 GHz |
| Range | Up to 50 meters | Up to 20 meters | Depends on the tasks |
Setting channel width for maximum speed
Frequency is not the only parameter that influences speed. The most important role is played by channel widthIn the 2.4 GHz band, the standard bandwidth is 20 MHz. Theoretically, 40 MHz could be used, which would double the throughput, but in practice, this would lead to even more interference in apartment buildings, as there are simply no available frequencies.
The situation is different in the 5 GHz band. Much more spectrum is available here, so it's recommended to set the channel width. 80 MHz or even 160 MHz, if your equipment and client devices support the standard Wi-Fi 6 (802.11ax)This will unlock the potential of high-speed Internet.
Why is 160 MHz not always better?
Setting the maximum channel width to 160 MHz takes up almost all of the available 5 GHz spectrum. If you or your neighbors have other routers, they will conflict. In densely populated areas, 80 MHz is often more stable.
Changing the channel width is done in the same menu where you select the frequency. Find the "Channel Width" drop-down list. Experiment to find the optimal value: if speed drops or gaps appear when setting 80 MHz, return to 40 MHz.
Analyzing the broadcast and choosing a free channel
Even with the correct frequency settings, you may experience low speeds if your router is operating on the same frequency as ten of your neighbors. To resolve this issue, you need to radio broadcast analysisThis will help you find the least loaded channel and manually enter it in the settings.
There are many free apps available for smartphones (for example, WiFi Analyzer for Android) and PC programs (for example, Acrylic Wi-Fi), which visualize channel congestion. Run a scan and see on which frequencies (channels) your neighbors' signals are weakest or absent altogether.
In your router settings, find the "Channel" setting. By default, it's set to "Auto." Switch it to manual mode and select the channel number that the analyzer shows as free. For the 2.4 GHz band, only channels 1, 6, and 11 are non-overlapping. For 5 GHz, the choice is much wider, and it makes sense to avoid the extreme values if they're occupied.
⚠️ Note: After changing the channel or channel width, the router may reboot or lose connection for a few seconds. This is normal behavior when applying new radio module settings.
Typical problems and solutions
After changing the Hertz frequency, users may encounter a situation where the device stops detecting the network or is unable to connect. This most often means that the network adapter drivers on the device are outdated or do not support the selected standard. In this case, it is necessary to update the Wi-Fi module drivers on the computer or the operating system on the smartphone.
Another common issue is speed drops when operating at the extreme range of the 5 GHz signal. If you move away from the router and the speed drops to zero instead of gradually decreasing, the device may be trying to hold on to the weak 5 GHz signal instead of switching to the longer-range 2.4 GHz band. A solution may be to reduce the transmitter power in the router settings or use a mesh network.
It's also worth checking whether MAC address filtering is enabled, which could reset or block the device when changing network settings. Make sure the client device doesn't have a static IP address that conflicts with the new subnet if you changed LAN settings.
Why doesn't my router allow me to select 50Hz (5GHz)?
This may mean your router is unidirectional (2.4 GHz only). Check the model's specifications. 5 GHz mode may also be disabled in your regional settings or may need to be enabled in the "Advanced" menu.
Does changing frequency affect ping in games?
Yes, switching to 5 GHz usually reduces ping and makes it more stable (less jitter), since the channel is less congested with interference from household appliances and neighboring networks, which is critical for online gaming.
Do I need to change the settings on my phone after changing the settings on my router?
Usually, your phone will automatically find the network with the new name (if you changed it) or reconnect. If the network isn't visible, try forgetting the network in your phone's Wi-Fi settings and reconnecting using the password.
Can high frequency harm health?
No, the radiation emitted by Wi-Fi routers (even at 5 GHz) is in the non-ionizing radiation range and is significantly below the maximum permissible safety standards established by international standards.