Q. Sampling rate for each speech channel on 32-channel PCM is 8 KHz each encoded into 8 bits. Determine duration of frame with time slot duration of 3.9 μs.

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Q. Sampling rate for each speech channel on 32-channel PCM is 8 KHz each encoded into 8 bits. Determine the duration of multi-frame if duration of a frame is 125 μs.

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Q. Determine excess avalanche noise factor F(M) if APD has multiplication factor of 100, carrier ionization rate of 0.02.

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Q. Compute average number of photons incident at receiver in APD if quantum efficiency is 80%, F (M) = 4, SNR = 144.

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Q. Determine incident optical power if zₘ=864, wavelength = 1 μm.

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Q. Determine wavelength of incident optical power if zₘ=864, incident optical power is -60.7 dB, Bᴛ=1 * 10⁷.

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Q. Determine total channel loss if connector loss at source and detector is 3.5 and 2.5 dB and attenuation of 5 dB/km.

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Q. Determine length of the fiber if attenuation is 5 dB/km, splice loss is 2 dB/km, connector loss at source and detector is 3.5 and 2.5.

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Q. Determine total RMS pulse broadening over 8 km if RMS pulse broadening is 0.6 ns/km.

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Q. Determine RMS pulse broadening over 8 km if total RMS pulse broadening is 5.8 ns/km.

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Q. Determine dispersion equalization penalty if total RMS pulse broadening is 4.8 ns, Bᴛ is 25 Mbits/s.

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Q. Determine RMS pulse broadening with mode coupling if pulse broadening is 0.6 over 8km.

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Q. Determine dispersion equalization penalty with mode coupling of 1.7 ns if Bᴛ is 25 Mbits/s.

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Q. Determine dispersion equalization penalty without mode coupling if Bᴛ is 150 Mbits/s and total rms pulse broadening is 4.8 ns.

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Q. Determine ratio of SNR of coaxial system to SNR of fiber system if peak output voltage is 5V, quantum efficiency of 70%, optical power is 1 mW, wavelength of 0.85 μm.

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Q. Determine the peak output voltage if efficiency is 70%, wavelength is 0.85 μm and output power is 1 mW.

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Q. Determine the efficiency of a coaxial cable system at 17 degree Celsius with peak output voltage 5V, 0.85 μm wavelength and SNR ratio of 1.04 * 10⁴.

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Q. Determine the wavelength of a coaxial cable system operating at temperature 17 degree Celsius at output voltage of 5V, 100Ω impedance, optical power of 1 mW, 70% quantum efficiency.

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Q. Determine the impedance of a coaxial cable system operating at temperature 17 degree Celsius at output voltage of 5 V, 0.85 μm wavelength, optical power of 1 mW, 70% quantum efficiency and SNR ratio of 1.04 * 10⁴.

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Q. The 10⁻90% rise times for components used in D-IM analog optical link is given. (LED=10 ns, Intermodal=9 ns/km, Chromatic=2 ns/km, APD = 3 ns). Link is of 5 km. Determine the total rise time.

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