SALIENT FEATURES :
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.
TECHNICAL SPECIFICATIONS :
► 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.