A voice-grade telephone line with bandwidth of 4 kHz (0 – 4kHz) is to be used in full-duplex transmission mode to transmit BFSK signals, produced by a modem, with frequency deviation set to 100 Hz and d-0. (i) (ii) (iii) State what is meant by full-duplex transmission modes. Determine the maximum bit rate supported by this scheme. Determine the mark and space frequencies in one direction.

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(a)
A voice-grade telephone line with bandwidth of 4 kHz (0 – 4kHz) is to be used in
full-duplex transmission mode to transmit BFSK signals, produced by a modem,
with frequency deviation set to 100 Hz and d-0.
(i)
(ii)
(iii)
State what is meant by full-duplex transmission modes.
Determine the maximum bit rate supported by this scheme.
Determine the mark and space frequencies in one direction.
Assume that a telephone line channel is equalized to allow bandpass data
transmission over a frequency range of 600 to 3000 Hz. Givend-1, evaluate the
bandwidth required for
(b)
(i)
(ii)
(iii)
2400 bps QPSK signaling
4800-bps 8-level multilevel signaling.
State whether the channel bandwidth is adequate in both cases in (1) and
(ii) above.
Transcribed Image Text:(a) A voice-grade telephone line with bandwidth of 4 kHz (0 – 4kHz) is to be used in full-duplex transmission mode to transmit BFSK signals, produced by a modem, with frequency deviation set to 100 Hz and d-0. (i) (ii) (iii) State what is meant by full-duplex transmission modes. Determine the maximum bit rate supported by this scheme. Determine the mark and space frequencies in one direction. Assume that a telephone line channel is equalized to allow bandpass data transmission over a frequency range of 600 to 3000 Hz. Givend-1, evaluate the bandwidth required for (b) (i) (ii) (iii) 2400 bps QPSK signaling 4800-bps 8-level multilevel signaling. State whether the channel bandwidth is adequate in both cases in (1) and (ii) above.
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