One of the biggest interference issues with Wi-Fi networks is actually the networks themselves. Eliminate interference from your own access points The active mode connects the client to the Wi-Fi AP and shows just the details for that connection, which is good for other reasons, like evaluating roaming. The passive mode will capture the signal and noise data of all the APs or channels, which is what you want to see for detecting general signal and interference issues.
WIRELESS NETWORK RADAR SOFTWARE
When using professional surveying software utilize both the passive and active modes simultaneously. In the end they'll create heatmaps of the signal, noise, and SNR overlayed on floorplans of the coverage area. Or, preferably, walk through using professional surveying software such as AirMagnet or Ekahau and then analyzing the data. You can do some spot checking by actively monitoring the levels with the right apps and wireless adapters while walking around. There are different ways to go about this, but all involve walking throughout the network coverage areas. You can see if interference is indeed an issue on your network by doing some site surveying.
Minimum for very basic use, but unreliable performance.Īny wireless functionality is highly unlikely.ĭetermine interference with a Wi-Fi survey Minimum for reliable performance and connectivity. Minimum for sensitive applications and very reliable performance. Max achievable but near impossible in the real world. Here’s a cheat sheet for the key signal and SNR levels: So, if the signal is -60 dBm and the noise is -90 dBm, then the SNR is 30 dB. It’s the difference between the signal and noise. To help you keep an eye on this gap refer to the signal-to-noise ratio (SNR) value. When the gap gets very small, the signal could be drowned out by the noise. The smaller the gap, the worse the Wi-Fi performance. You want the biggest gap between the signal and noise levels as possible. The noise levels can vary, but typically range between -90 dBm (typical moderate noise) to -98 dBm (nearly no noise). The signals have to combat noise or interference from other Wi-Fi devices, other wireless devices in the same frequency band, or even other non-wireless electronics interfering, like microwave ovens or electrical boxes. Signal levels typically range from -30 dBm (best signal possible) to -90 dBm (least signal possible). Such signals from other devices are just noise to yours.
A client can be right next to an AP with excellent signal but be unable to keep a connection if the signal from another Wi-Fi or any other type of radio-frequency device is too great. Optimize the signal-to-noise ratioĪlthough some people only talk about signal levels when designing or troubleshooting Wi-Fi networks, you must consider more. So, try to find the root causes of any symptoms and be very intentional about the changes you make. If so, maybe you blindly add more access points (AP) and, not knowing that you already had interference, that can actually cause more interference. The symptoms of interference issues can easily be mistaken for symptoms of other, more apparent problems such as poor Wi-Fi coverage.
WIRELESS NETWORK RADAR HOW TO
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