What is SNR Calculation for Cisco Exam 350-401-ENCOR?
Question
Which two pieces of information are necessary to compute SNR? (Choose two.)
Answers
Explanations
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A. B. C. D. E.AB.
https://community.cisco.com/t5/wireless-mobility-documents/snr-rssi-eirp-and-free-space-path-loss/ta-p/3128478Signal-to-noise ratio (SNR) is a measure of the strength of the desired signal compared to the level of background noise. It is used to evaluate the quality of a wireless signal, and it is important in determining the data rate, range, and overall performance of a wireless system.
To compute SNR, two pieces of information are necessary:
Transmit power: The transmit power is the amount of power that a wireless device is using to transmit a signal. This value is typically measured in decibels (dBm) and can vary depending on the device and the environment.
Noise floor: The noise floor is the level of background noise in the environment. It is the minimum signal level that can be detected by the wireless receiver. This value is also measured in decibels (dBm) and can vary depending on the environment and the receiver sensitivity.
Once these two values are known, SNR can be computed by subtracting the noise floor from the transmit power:
SNR = Transmit Power - Noise Floor
Therefore, options A and B are the correct answers as they provide the necessary information to compute SNR. Options C, D, and E are related to wireless communication but are not necessary to compute SNR.
EIRP (Effective Isotropic Radiated Power) is the measure of the power that is radiated from an antenna in a specific direction. RSSI (Received Signal Strength Indication) is the measurement of the strength of the received signal at the receiver antenna. Antenna gain is the measure of the efficiency of an antenna in transmitting and receiving signals.
