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Objective:

Experiment Observation:
In this experiment, we used ANACOM 2 module as the main circuit board.  First, we investigated the operation of the Phase-Locked Loop Detector block on the ANACOM 2 module.

Next, we used the Varactor Modulator on the ANACOM 2 module to generate FM signal and then investigated the output of Phase-Locked Loop Detector. We also investigated the input and output of Low Pass Filter Amplifier Block to observe the performance of the detector.

After that, we investigated the effect of noise on the system.  We observed the signal at output of Low Pass Filter Amplifier Block with the effect of noise.  Next, we investigated the noise alone at the output of Low Pass Filter Amplifier Block.  Then, we observed the noise with the Quadrature Detector as detector instead of Low Pass Filter.  Lastly, with the use of Amplitude Limiter block, we observed the noise again.

References:

· Kennedy and Davis, “ Electronic Communication Systems”, 4th Edition, McGRAW-HILL, 1993

· Paul H. Young, “Electronic Communication Techniques”, 3rd Edition, Macmillan Publishing Company, 1990

· D C Green, “Radio Systems for Technicians”, 2nd Edition, Longman Group Limited, 1995

· John Pearson, “ Basic Communication Theory”, Prentice Hall, 1992

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