A television signal is sampled at a rate of 25% above the

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A television signal is sampled at a rate of 25% above the Nyquist rate. The signal has a bandwidth of 6 MHz. The samples are quantized into 512 levels. The minimum bandwidth required to transmit this signal would be—

1. 135M bits/sec
2. 67.5 M bits/sec
3. 270 M bits/sec
4. None of these.

Correct Option: A

Given that f_m = 6MHz
f_s = 2f_m + 25 % of 2f_m

f_s = 12MHz +	25 × 12	MHz
	100

f_s = 15MHz
and
L = 2ⁿ = 512
n = 9
BW = nf_s = 15 × 9 MHz = 135 MHz