The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz). What is the center frequency of channel 4?

Question

Options

• A2.427
• B2.422
• C2.413
• D2.417

• A
  85% (17)
• B
  10% (2)
• D
  5% (1)

Explanation

The center frequency of channel 4 in the 2.4 GHz band is 2.427 GHz (2427 MHz). The center frequency of a channel is the midpoint of its frequency range, where the signal strength is highest and most concentrated. The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz), as given in the question. The center frequency of each subsequent channel is obtained by adding 5 MHz to the previous channel's center frequency, since the channels are spaced 5 MHz apart from each other in this band. Therefore, to find the center frequency of channel 4, we need to add 15 MHz (5 MHz x 3) to the center frequency of channel 1: 2.412 GHz + 0.015 GHz = 2.427 GHz Alternatively, we can use a formula to calculate the center frequency of any channel in the 2.4 Center frequency (GHz) = 2.407 + (0.005 x Channel number) Using this formula for channel 4, we Center frequency (GHz) = 2.407 + (0.005 x 4) Center frequency (GHz) = 2.407 + 0.02 Center frequency (GHz) = 2.427

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