-jps-
Junior Member level 2
Someone answers this questions pls....
1. Why are signals soft keyed?
2. How does the spectrum of an unipolar and a bipolar PAM differ?
3. At what frequency spacing do the spectral lines follow one another when only the sampling pulse is analyzed?
4. In what cases can the information signal no longer be filtered out of the PAM signal by a low pass filter Fg=3.4 kHz?
5. How can a PSK modulator be assembled with the product modulator?
1. Why are signals soft keyed?
2. How does the spectrum of an unipolar and a bipolar PAM differ?
3. At what frequency spacing do the spectral lines follow one another when only the sampling pulse is analyzed?
4. In what cases can the information signal no longer be filtered out of the PAM signal by a low pass filter Fg=3.4 kHz?
5. How can a PSK modulator be assembled with the product modulator?