A C-band satellite link sends a single NTSC-TV signal through a 36-MHz transponder on a C-band GEO satellite. The NTSC video signal is modulated onto the carrier using wideband frequency modulation, and the bandwidth of the transmitted RF signal is 32 MHz.
The baseband bandwidth of the TV signal is 4.2 MHz.
a. Calculate the peak frequency deviation of the FM carrier using Carson's rule.
b. Calculate the unweighted FiM improvement factor for the video signal.
c. The overall C/N in an earth station receiving the FM-TV transmission is 17 dB. What is the unweighted video S/N ratio at baseband?
d. De-emphasis and weighting factors improve the quality of the C/N ratio by a subjective factor of 17 dB. What is the weighted S/N of the baseband video signal?
