Communication channels

[ifrah jaffri]

hi,
I need to ask that what is meant by frequency of channels ? i mean if a signal of for example x frequency is travelling through a channel of y frequency, what does it physically means ?

 

[Miralipoor]

Every electrical channels have a frequency response that can be mapped to frequency domain by using fourier transform .Maximum frequency in frequency domain characterize frequency of channel.If signal's max frequency is lower that channel capacity then your signal travel through channel without any damping(losing information) in contrary if your signal frequency is greater that channel frequency then your signal will be damped.Actually your question is not as simple as my answer.
In general every channel have limited information capacity.

 

[ifrah jaffri]

ok thank you. Actually your question answered my query.