For the transponder scheme of Figure 9.10, what is the percentage bandwidth used

Question

For the transponder scheme of Figure 9.10, what is the percentage bandwidth used for the guardbands?

What I think the answer is 11 channels x 4 Mhz = 44Mhz. Then 44Mhz/500 Mhz = 0.088 = 8.8%. Let me know if I am correct please. If I am not please let me know what I need to do.

For the transponder scheme of Figure 9.10, what is the percentage bandwidth used for the guardbands? What I think the answer is 11 channels x 4 Mhz = 44Mhz. Then 44Mhz/500 Mhz = 0.088 = 8.8%. Let me know if I am correct please. If I am not please let me know what I need to do.

Explanation / Answer

9.5 The total bandwidth is 500 MHz. The channel bandwidth is 12 × 36 = 432 MHz. So the overhead is ((500 - 432)/500) × 100% = 13.6%

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