ANGLE MODULATION AND DETECTION Preliminaries The preliminary work is worth 20% of the report mark and must be completed
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ANGLE MODULATION AND DETECTION Preliminaries The preliminary work is worth 20% of the report mark and must be completed before the laboratory session. 1) Given that the frequency deviation constant bis 5kHz/volt, what is the required amplitude of the modulating signal such that J.(B) = 0? What is the value of Bfor this case? Note to =2kHz.
2) What are the values of the Bessel Coefficients when J. = 0 ? i.e. the first five sidebands. Plot the spectrum assuming that the unmodulated carrier has an amplitude of 2V.
Partner Name Id: 3) State Carson's rule for bandwidth estimation. What does it reduce to for NBFM and WBFM? 4) Derive an time domain expression for the output Xdt) of the system shown in Figure 4-1.
Message Differentiator Multiplier VCO d/dt LPF 160 kHz xd (1) 2 sin(4000nt) Phase Shifter с 1 R Differentiator Use the envelope detector box Figure 4-1 FM Detector
5) Show how a NBFM signal can be generated using the modulator shown in Figure 5-1. State all assumptions.
Adder Audio Oscillator Module Multiplier A Output Х Σ Message 2 cos(4000ft) B Carrier 2cos(2001x1031) Phase Shifter Figure 5-1 Narrowband PM Modulator