Vtu Digital Communication Lab Manual
Design, implementation and st udies of the properties of 15 bit P.N. Sequenc e using shift re gister 2. Studies of the prop erties of A /D and D /A converter (AD7820/ADC0820 and IC L 8018A/8019A/8020A). (Properties like transfer characteristics, code central line method of nonlinearity study, differential nonlinearity, integral nonlinearity, resolution etc). Study of pulse amplitude modulation and demodulation. (Studies of distortion factor of the constructed signal as a function of signal frequency & amplitude.
Further study of distortion factor of filtered reconstructed signal as a function of sampling frequency and thus verify the sampling theorem). Studies of PCM transmitter and receiver. (To measure the bit rate, bandwidth requirement and distortion factor of the reconstructed signal in presence of channel noise). Study of line coders: UPNRZ, PRZ, BPRZ, PNRZ (To study the nature of waveform in CRO and its spectrum by spectrum analyzer.
At least any one of the line coders has to design, fabricated and tested). Studies of Manchester coding and decoding technique. (Studies of the nature of waveform, spectrum and self-synchronizing characteristic). Studies of PSK modulator and demodulator, connected by physical channel. Studies on FSK modulator and demodulator, connected by simulated channel 9.
Vtu 6th Sem Digital Communication Lab Manual
Studies on ASK modulator and demodulator, connected by physical channel 10. Medical equipment service manual law. Studies on Q PSK modulat or and demodulator, connected by either physical or simulated channel (In all above experiments, nature of the modulated waveform is to be studied by a CRO. The spectrum is to be studied with a spectrum analyzer and the essential bandwidth is to be determined; finally the reception quality is to be analyzed by cross co-relation characteristics and measurement of bit error rate in presence of channel noise). Studies on Delta modulator & Demodulator using trainer kits 12.
Studies on Adaptive delta modulation using trainer kits 13. Studies on delta signal modulation using trainer kits 14. Studies on PCM/TDM system (Multiplexing/Demultiplex ing) (Object is to measure distortion factor of the demodulated signal with variable signal amplitude and frequency, measure the essential B.W.
Of the modulated signal 15. Studies of PCM/TDM system (Multiplexer & Demultiplexer) (To study the interchannel interference and synchronization problem in multiplexer and demultiplexer system.