The signal-to-noise ratio (SNR) is the difference between the received wireless signal and the noise floor, which is the level of background noise on the spectrum. A high SNR means a good signal quality, while a low SNR means a poor signal quality. The noise floor can be affected by various sources of interference, such as cordless phones, microwaves, radar, etc. To troubleshoot a wireless connection issue caused by a low SNR, the technician should first identify and remove any electronics that might be causing interference in the area. This would improve the SNR and the wireless performance. Running diagnostics on the relevant devices, moving the access point to a different location, or escalating the issue to the vendor's support team are possible steps to take after removing the interference sources, but not the next step. Reference:
Signal-to-Noise Ratio (SNR) and Wireless Signal Strength
Wireless: SNR, RSSI and Noise basics of wireless troubleshooting
What is Signal-to-Noise Ratio and How to Measure it
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