QAM/DQAM Modulation & Demodulation Kit 7521

Categories: Advance Communication ( series 75XX )


             The QAM/DQAM Modulation Trainer helps the student to learn the concepts in QAM/DQAM generation and its application. The circuit comprises of a Carrier sine wave generator, a NRZ L data generator, Clock and data generator, QAM/DQAM Modulator Circuit and the required power supply. The circuit is housed in an elegant cabinet with a well spread intelligently designed circuit layout on the front panel and is strongly supported by a comprehensive instruction manual.


►          Carrier Sine Wave Generator        :           Four carrier sine waves Generated onboard Provides synchronized Sine waveform output of 500KHz (0 deg.), 500KHz (90 deg.), 500KHz(180 deg.),500KHz(270 deg.).

►         Clock and Data Generator               :           – 24 bit variable NRZ-L pattern generated depending on the position of the three nos. of 8-dit Data Switch provided Clock Frequency is of 250 KHz.

►         Data Format ( Coding )                     :           Non Return to Zero – Level ( NRZ-L ) Tribit encoded data (I ,Q & C) Differential Encoded I & Q Bits.

►         Carrier Modulation Techniques   :           Quadrature Amplitude Modulation, Differentially Quadrature Amplitude Modulation.

►         Switch Faults                                        :           4 Nos.

►         Power Supply                                       :           ± 5V and ± 12V.

►         Test Points                                             :           Provided at various stages in the circuit to observe the voltages and waveforms.

►         Interconnections                                :           4 mm terminals are provided.

►         Accessories                                           :          ►    Set of 4 mm patchcords.

                                                                                            ►      Instruction Manual.


►         To Study the Elements of 8-QAM / DQAM system.

►          Tribit Coding Technique of NRZ-L data format.

►          Differential Encoding of Data.

►          8-QAM Modulation technique.

►          DQAM Modulation technique.

►          To study of constellation Diagram of QAM.

►          To study bandwidth efficiency in QAM techniques.

►          Effect of Switch faults.