How to measure signal-to-noise ratio

[Timc95]

How do you measure the signal-noise-ratio of MR accesspoints? And how do higher decibel values indicate better signal quality?

[alemabrahao]

Take a look at this:

Signal-to-Noise Ratio (SNR) and Wireless Signal Strength - Cisco Meraki Documentation

[AlexL1]

Hi Timc95,

In addition to the alemabrahao comment, please find the following documentations:

• Common sources of wireless interference
• Checking Signal Strength and Throughput on a Cisco Meraki Wireless network
• Troubleshooting poor wireless performance

SNR = Signal Level (dB) - Noise Level (dB).

• For example, if a signal is -50 dBm and the noise floor is -90 dBm, the SNR would be 40 dB (-50 - (-90) = 40).
• A higher SNR value means the signal is stronger in relation to the noise

Why higher SNR is better:

• A higher SNR leads to fewer errors in data transmission, resulting in faster and more reliable connections. 
• A strong signal relative to noise means the receiver can more easily distinguish the intended signal from interference, leading to better performance. 

SNR in Wireless Networks:

• In wireless networks, SNR is a crucial factor in determining the quality of a connection. 
• A low SNR can lead to dropped connections, slow speeds, and overall poor performance. 
• Factors that can affect SNR include distance from the access point, interference from other devices, and the quality of the wireless channel.

In conclusion, in general, a signal with an SNR value of 20 dB or more is recommended for data networks where as an SNR value of 25 dB or more is recommended for networks that use voice applications. Learn more about Signal-to-Noise Ratio.

If you have any questions, please don't hesitate to contact us.