Waveforms must be compatible with transmitting channels to ensure effective communication, as different channels have specific frequency limitations. Sending random waves without understanding their characteristics can lead to signal loss or distortion, especially if the transmission medium has cutoff frequencies. For instance, coaxial cables exhibit significant loss at higher frequencies, while waveguides are ineffective for lower frequency signals. Understanding the properties of both the waveform and the transmission medium is crucial for successful signal transmission. Proper compatibility ensures reliable communication and minimizes transmission issues.