Signal to Noise Ratio report reveals lowest overall radio frequency (RF) signal-to-noise (SNR) percentages observed for the selected duration. SNR is particularly important for wireless networking for ensuring QoS for voice and other continuous media traffic over IP. When measured in dB, SNR should fall between 25 and 40 dB —where:
SNR is calculated by subtracting the wireless signal strength from that of the noise floor. Poor signal to noise ratio can occur due to hardware transmit issues, nearby devices emitting radio frequency interference (RFI), and other sources of higher than normal RFI present in the ambient that combine to contribute to the normal background noise also referred to as the noise floor.
Note: Percentages reported likely will never reach 0 or 100. Generally, An SNR of 40% is considered good. Anything less than 20% is considered poor.
Choose Device. Choose one or more host devices you want Signal to Noise Ratio measurements for.
Choose time constraints. (,) Choose times for the Signal to Noise Ratio. (For recently observed measurements, select Last Polled from the Date Range drop down list.)
Filter and reduce by row and by column. Sort and remove columns, group rows based on specific column values, and remove unwanted information from the table.
Chart, adjust output, and visualize. Fine tune report presentation and range of values displayed using the Report Settings dialog (optional).
Note: This report only returns Signal to Noise Ratio metrics for devices that already have the appropriate WMI or SNMP credentials. For more information, see Using Credentials.
Most generated Signal to Noise Ratio report data can be printed, shared, and exported when selecting Expand () from the Dashboard Options () menu. After the report has been expanded, select export () to access the following options: