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.
♦ 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.
Specifications Are Subject To Change Due To Constant
Developments Without Any Prior Notice