The SNR margin is the Signal to Noise Ratio margin. Signal to Noise Ratio is the relation between the data signal level and the noise level. Even the most perfect cable absorbs some noise. This "noise" is electromagnetic interference produced by: other cables running near the cable. Faulty connectors. Motors or transformers near the cable. Radio systems. If the noise is strong then the signal cannot be recognized. Higher ratios means better cables. Below 10dB is very bad and more than 20dB is good. At higher ratios, more speed can be achieved and lower ratios mean error-prone cable and lower speeds. The SNR margin is the difference between the SNR of the cable and the SNR needed to get an specific speed. Suppose that the SNR of the cable is 34dB and the SNR to sync at 6Mb is 30dB, then the SNR margin is 34-30 = 4dB Attenuation Every cable on earth suffers of attenuation. It is a measure of how the signal loses strength when running through the cable. Suppose you put 5 volts in the end of a 1 Kilometer cable. If you measure the voltage in the other end you get, for example 4.5 volts. There was an attenuation of the original voltage. If the cable was longer, for example, 5 kilometers then the voltage on the far side could be very low. For data signal this is key because if the original signal is strongly atternuated it could be gibberish for the equipment.
ap attenuation k baray me batayenn..or ye kyun high hotaa hai or isko kis trah kam krtay hain..mera SNR margin thek hai but Attenuation 612 araha hai.. kindly brother is k baray me batayen
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