6 votes 6 votes Data is transmitted continuously at $2.048$ Mbps rate for $10$ hours and received $512$ bits errors. What is the bit error rate? $\text{6.9 e-9}$ $\text{6.9 e-6}$ $\text{69 e-9}$ $\text{4 e-9}$ Computer Networks isro2011 computer-networks error-detection + – Sanjay Sharma asked Jun 21, 2016 edited May 31, 2020 by Krithiga2101 Sanjay Sharma 5.4k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 13 votes 13 votes Bit error rate is the number of bits sent per data . In 10 hrs , we sen 512 bit error so in 1 sec, we can send = 0.0142 bit error. hence error rate is 0.0142/2.048 x 10^6 6.944 x 10^-9 Kapil answered Jun 21, 2016 selected Jun 28, 2017 by Kapil Kapil comment Share Follow See all 2 Comments See all 2 2 Comments reply JashanArora commented Dec 5, 2019 reply Follow Share What's wrong with this approach? In 10 hours, data transferred = 7372.8Mb In 10 hours, error = 512b So error rate = 512 / 7372.8M = 0.069 * $10^{-6}$ = 69*$10^{-9}$ (Option C) As per the formal definition of bit error rate The bit error rate (BER) is the number of bit errors per unit time. In 10 hrs we get 512 bit errors. Hence, 0.0142bps which isn't in the options. 1 votes 1 votes Sanjay Sharma commented Oct 30, 2021 reply Follow Share calculation mistake in approach in 10 hrs data sent is 10x60x60 x2.048 =73728 M 1 votes 1 votes Please log in or register to add a comment.
8 votes 8 votes Answer : A Error rate = Error bits/time Error rate = 512/36,000 Mbps Bandwidth = 2.048 Mbps Error rate = Error rate /Bandwidth Error rate = (512*/36,000)/2.048 *10^6 = 0.1422/2.048 = 6.9*10^(-9) shekhar chauhan answered Jun 21, 2016 shekhar chauhan comment Share Follow See 1 comment See all 1 1 comment reply Nishant Sahu commented Jun 6, 2023 reply Follow Share error rate = error rate/ bandwidth ?? whats this?? 0 votes 0 votes Please log in or register to add a comment.