i am reading computer networks and i am trying to solve an excercise. the excercise is
What is the theoretically the maximum rate at which data can be transmitted to a 4000Hz bandwidth communication channel having a noise of 30dB if the number of discrete signal states is 6?
I thougth that i must use the sannon hartley because the channel having noise. The the formula is 𝑅=𝑊log2(S/N+1). Then from the type 𝑆𝑁𝑅=10log10(𝑆/𝑁) i calculate the 𝑆/𝑁. But i cant understand
if the number of discrete signal states is 6
i must modify the formula or something else? What should i do?