Aug 27, 2007 #1 L liberal Advanced Member level 4 Joined Nov 25, 2004 Messages 105 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Activity points 828 CNR and SNR what is CNR and SNR?their differences?how to measure them?
Aug 27, 2007 #2 V vfone Advanced Member level 6 Joined Oct 10, 2001 Messages 5,709 Helped 1,616 Reputation 3,237 Reaction score 1,248 Trophy points 1,393 Activity points 36,263 Re: CNR and SNR Carrier to Noise Ratio (CNR) is a measure of the received carrier strength relative to the strength of the received noise. CNR[dB] = 10 log10(Pc/Pn) where Pc - incoming carrier strength in microwatts Pn - noise level in microwatts Signal to Noise Ratio (SNR), is a measure of signal strength relative to background noise. SNR[dB] = 20 log10(Vs/Vn) where Vs - incoming signal strength in microvolts Vn - noise level in microvolts
Re: CNR and SNR Carrier to Noise Ratio (CNR) is a measure of the received carrier strength relative to the strength of the received noise. CNR[dB] = 10 log10(Pc/Pn) where Pc - incoming carrier strength in microwatts Pn - noise level in microwatts Signal to Noise Ratio (SNR), is a measure of signal strength relative to background noise. SNR[dB] = 20 log10(Vs/Vn) where Vs - incoming signal strength in microvolts Vn - noise level in microvolts
Mar 3, 2010 #3 Y yours_david Newbie level 3 Joined Dec 3, 2009 Messages 4 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location Australia Activity points 1,330 Re: CNR and SNR Why CNR use 10log10(xxx) but SNR use 20log10(xxx) ?? vfone said: Carrier to Noise Ratio (CNR) is a measure of the received carrier strength relative to the strength of the received noise. CNR[dB] = 10 log10(Pc/Pn) where Pc - incoming carrier strength in microwatts Pn - noise level in microwatts Signal to Noise Ratio (SNR), is a measure of signal strength relative to background noise. SNR[dB] = 20 log10(Vs/Vn) where Vs - incoming signal strength in microvolts Vn - noise level in microvolts Click to expand...
Re: CNR and SNR Why CNR use 10log10(xxx) but SNR use 20log10(xxx) ?? vfone said: Carrier to Noise Ratio (CNR) is a measure of the received carrier strength relative to the strength of the received noise. CNR[dB] = 10 log10(Pc/Pn) where Pc - incoming carrier strength in microwatts Pn - noise level in microwatts Signal to Noise Ratio (SNR), is a measure of signal strength relative to background noise. SNR[dB] = 20 log10(Vs/Vn) where Vs - incoming signal strength in microvolts Vn - noise level in microvolts Click to expand...
Mar 4, 2010 #4 V vfone Advanced Member level 6 Joined Oct 10, 2001 Messages 5,709 Helped 1,616 Reputation 3,237 Reaction score 1,248 Trophy points 1,393 Activity points 36,263 Re: CNR and SNR Because in this case one uses ratio of powers, and other ratio of voltages.