What is one disadvantage of using some automatic DSP notch-filters when attempting to copy CW signals?
- A. The DSP filter can remove the desired signal at the same time as it removes interfering signals
- B. Any nearby signal passing through the DSP system will always overwhelm the desired signal
- C. Received CW signals will appear to be modulated at the DSP clock frequency
- D. Ringing in the DSP filter will completely remove the spaces between the CW characters