A PLL is designed to work for a system to cover 1200 to 1400 MHz with channel spacing of 200 KHz, and if a fractional N is used (with a 20 MHz reference): a- at how many reference cycles the divider has to change by 1 b- b- what is the range of the divider? c- c- If we assume no new source of noise has been added due to fractionality how much the phase noise has improved within the system bandwidth compared with the integer PLL A PLL is designed to work for a system to cover 1200 to 1400 MHz with channel spacing of 200 KHz, and if a fractional N is used (with a 20 MHz reference): a- at how many reference cycles the divider has to change by 1 b- b- what is the range of the divider? c- c- If we assume no new source of noise has been added due to fractionality how much the phase noise has improved within the system bandwidth compared with the integer PLL