Increasing transmit power on an ASUS RT-AC68U wifi router | Wolph.Please note that this depends on your antenna as well so please be that you won’t go over the allowed transmit power for your location. The ETSI standard is used in the following regions: Here’s a very informative blogpost about the ETSI standard. Since the ETSI standard many of these have been replaced by a single standard. While these are not specifically named, this includes 802.11ac, 802.11n, 802.11g and the collections such as 802.11abgn. Note that the a and b bands means the 802.11/a (5GHz) and 802.11/b (2.4GHz) respectively. So here’s a list of the maximum allowed transmission power (EIRP) per country. And check out the Bluetooth range estimator to see how far Bluetooth ® range can go for you.Note: for a more up to date overview look at the Linux Kernel: įor some reason it appears that this is quite hard to come by, most documentation only talks about the transmission power in dBm which is just less easy to read than mW to me. Learn more about other factors, such as path loss, antenna gain, and PHY, that play a key role in determining the effective range of a Bluetooth solution. In other words, it’s the lowest power level at which the receiver can detect a radio signal, maintain a connection, and still demodulate data. Receiver sensitivity is the measure of the minimum signal strength a receiver can interpret. Think of receiver sensitivity as a measure of how well you can hear or the quietest sound you can hear and understand. However, Bluetooth implementations typically achieve much higher receiver sensitivity levels of -95 dBm or better. Receiver Sensitivityīluetooth ® technology specifies that devices must be able to achieve a minimum receiver sensitivity of -70 dBm to -82 dBm, depending on the PHY used. However, increasing the transmit power increases the power consumption of your device.īluetooth ® technology supports transmit powers from -20 dBm (0.01 mW) to +20 dBm (100 mW). The higher the transmit power, the more likely the signal can be heard at longer distances, and the longer the effective range. The louder you speak, the farther away someone can hear you, but the more energy it takes.Ĭhoosing a transmit power level is a design tradeoff between range and power consumption. Think of transmit power like the volume of your voice. In addition, the 2.4 GHz band is available worldwide, making it a true standard for low-power wireless connectivity. As a result, selecting a radio spectrum comes with tradeoffs between range and data rate.īluetooth ® technology uses the 2.4 GHz ISM spectrum band (2400 to 2483.5 MHz), which enables a good balance between range and throughput. However, the lower the frequency, the lower the data rate it can support. The lower the frequency, the longer the range. Radio spectrum stretches from 30 Hz to 300 GHz. When determining signal range and reliability at greater distances, several factors need to be considered. Bluetooth has the flexibility to be as precise as less than a meter or to reliably connect devices more than a kilometer apart. While the most well-known Bluetooth use cases, such as audio streaming and wearables, are built with short-range connectivity in mind, this is not because of an inherent limit to the effective range of the technology. A fit-for-purpose solution, Bluetooth ® technology allows developers to create wireless innovations that best meet the needs of their target use case.
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