What is the approximate bandwidth required to transmit a CW signal?

What is the approximate bandwidth required to transmit a CW signal?

• A. 50 Hz
• B. 150 Hz
• C. 300 Hz
• D. 600 Hz

Answer: (B)

The bandwidth required to transmit a Continuous Wave (CW) signal is approximately 150 Hz. CW signals consist of a single frequency that is turned on and off to convey information, using the Morse code. The bandwidth is determined by how fast the information is being sent and the keying speed of the operator. For typical CW operation, the bandwidth is set to about 150 Hz to allow for proper separation between signals and to minimize interference. This bandwidth allows the receiver to adequately detect and demodulate the Morse code signals without distortion while also ensuring that the signal remains clear and intelligible for the operator. In contrast, CW signals that are too narrow may become difficult to interpret due to noise and interference from other signals. Other options suggest wider bandwidths, which are not optimal for CW transmissions as they can lead to more interference and reduced performance in closely packed frequency bands. Thus, 150 Hz is considered the standard, facilitating efficient communication in amateur radio contexts.

The bandwidth required to transmit a Continuous Wave (CW) signal is approximately 150 Hz. CW signals consist of a single frequency that is turned on and off to convey information, using the Morse code. The bandwidth is determined by how fast the information is being sent and the keying speed of the operator.

For typical CW operation, the bandwidth is set to about 150 Hz to allow for proper separation between signals and to minimize interference. This bandwidth allows the receiver to adequately detect and demodulate the Morse code signals without distortion while also ensuring that the signal remains clear and intelligible for the operator.

In contrast, CW signals that are too narrow may become difficult to interpret due to noise and interference from other signals. Other options suggest wider bandwidths, which are not optimal for CW transmissions as they can lead to more interference and reduced performance in closely packed frequency bands. Thus, 150 Hz is considered the standard, facilitating efficient communication in amateur radio contexts.