In: Electrical Engineering
A transmitter must operate at a frequency of 168.96 MHz with the deviation of +/- 5kHz. It uses three multipliers – a doubler, a tripler, and a quadrupler. Phase modulation is used. Calculate the frequency of the carrier crystal oscillator and the phase shift required to produce the necessary deviation at a 2.8 kHz modulation frequency.
Carrier Frequency = Phase Shift =
For the given data the required parameters are calculated as below :
The frequency of carrier crystal oscillator and the phase shift angle is
So total phase shift positive and negative is 8.526 degrees.