Question

Q.16. A TV signal with a maximum frequency of 42 MHz is transmitted using binary PCM. The number of quantization level is 1024. Calculate: a) Code word length n. b) Transmission bandwidth BW. c) Average output SNR. d) The bit rate $b_r$. Q.17. Two analogue signals $x_1(t)$ and $x_2(t)$ are to be transmitted over a common channel by means of TDM. The highest frequency of $x_1(t)$ is 3 KHz and the that of $x_2(t)$ is 4.5 KHz. What is the minimum allowable sampling frequency and time rate? Q.18. A signal $x_1(t)$ is band limited to 4.2 KHz and the three other signals $x_2(t)$, $x_3(t)$ and $x_4(t)$ are band limited to 1.4 KHz each. Assume that these signals are transmitted by TDM. Find the following: a) Set up a TDM scheme for realizing this multiplexing requirement with each signal sampled at its Nyquist rate. b) Identify the required speed of the commutator in samples/sec. c) Identify the minimum bandwidth requirement of the channel. d) If $L = 1024$ levels and the output signal is binary coded, what is the output bit rate?

          Q.16. A TV signal with a maximum frequency of 42 MHz is transmitted using binary PCM. The
number of quantization level is 1024. Calculate:
a) Code word length n.
b) Transmission bandwidth BW.
c) Average output SNR.
d) The bit rate $b_r$.
Q.17. Two analogue signals $x_1(t)$ and $x_2(t)$ are to be transmitted over a common channel by
means of TDM. The highest frequency of $x_1(t)$ is 3 KHz and the that of $x_2(t)$ is 4.5 KHz. What is
the minimum allowable sampling frequency and time rate?
Q.18. A signal $x_1(t)$ is band limited to 4.2 KHz and the three other signals $x_2(t)$, $x_3(t)$ and $x_4(t)$
are band limited to 1.4 KHz each. Assume that these signals are transmitted by TDM. Find the
following:
a) Set up a TDM scheme for realizing this multiplexing requirement with each signal sampled
at its Nyquist rate.
b) Identify the required speed of the commutator in samples/sec.
c) Identify the minimum bandwidth requirement of the channel.
d) If $L = 1024$ levels and the output signal is binary coded, what is the output bit rate?

Q.16. A TV signal with a maximum frequency of 42 MHz is transmitted using binary PCM. The
number of quantization level is 1024. Calculate:
a) Code word length n.
b) Transmission bandwidth BW.
c) Average output SNR.
d) The bit rate br.
Q.17. Two analogue signals x1(t) and x2(t) are to be transmitted over a common channel by
means of TDM. The highest frequency of x1(t) is 3 KHz and the that of x2(t) is 4.5 KHz. What is
the minimum allowable sampling frequency and time rate?
Q.18. A signal x1(t) is band limited to 4.2 KHz and the three other signals x2(t), x3(t) and x4(t)
are band limited to 1.4 KHz each. Assume that these signals are transmitted by TDM. Find the
following:
a) Set up a TDM scheme for realizing this multiplexing requirement with each signal sampled
at its Nyquist rate.
b) Identify the required speed of the commutator in samples/sec.
c) Identify the minimum bandwidth requirement of the channel.
d) If L = 1024 levels and the output signal is binary coded, what is the output bit rate?

Added by Juan Antonio W.

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