Digital Communication lab

Digital Communication Laboratory (EC-591)

General information about the Laboratory:This Lab is used in 5th semesters, Student of ECE departments are using this lab, Approximate area of the lab is 1250sq ft, Location of the lab is 2nd Floor and Room No-310B, Average no of student per session 30 to 35, No of setup available is 8, No of students per setup is 4.

Course Outcomes:

CO1: Analyze the concept of digital communication techniques and their applications.

CO2: Demonstrate to the practical methods of the use of generating communication signals.

CO3: Evaluate practical methods of the use of demodulation communication signals.

CO4: Distinguish the significance of signal constellation and spectral width.

CO5: Develop insight into the relations between the input and output signals in various stages of a transmitter and a receiver

CO6: Clearly distinguish between contemporary digital communications techniques.

Name of the experiments performed

  1. Study of PAM and demodulation.
  2. Study of PCM and demodulation.
  3. Study of delta modulator and demodulator
  4. Study of adaptive delta modulator and demodulator
  5. Study of ASK modulator and demodulator
  6. Study of BPSK modulator and demodulator
  7. Study of BFSK modulator and demodulator.
  8. Study of QPSK modulator and demodulator.

Name of the innovative experiments

  1. Study of PWM Modulation and demodulation.
  2. Study of A/D and D/A Converters.
  3. Design, implementation and studies of the properties of 15-Bit P-N Sequence using shift register.

Facility available in the laboratory

  • Signal Generator (Direct Digital Synthesis Signal Generator), 3MHz, 1 Channel, Output Voltage ± 20Vpp in 50Ω Load.
  • 10MHz – Modulation Function-Pulse Generator, Output Voltage ± 20Vpp in 50Ω Load.
  • Cathode Ray Oscilloscope (CRO), 100MHz, 2 Channels, 4 Trace
  • Cathode Ray Oscilloscope (CRO), 50MHz, 2 Channels, 4 Trace
  • Digital Storage Oscilloscope (DSO), 50MHz, 2 Channels, 4 Trace, 250MSa/s Real-Time and 25GSa/s Equivalent-Time Sampling
  • Digital Storage Oscilloscope (DSO), 100MHz, 2 Channels, 4 Trace, Real-Time Sample Rate 1.0SG/s
  • Spectrum Analyzer Frequency Range: 150KHz to 1050MHz 4½ Digit Display: Centre & Marker Frequency, 0.1MHz Resolution Amplitude Range : -100dBm to +13dBm Filters : 20KHz, 400KHz & Video Filter AM /FM Demodulator Included Full Range Built-in Tracking Generator : 0.15MHz to 1050MHz.
  • Multiple Power Supply, A : 0-30 V, 1 A continuously variable by means of coarse & fine controls, 5 V, 1 A Adjustable from 4 V - 6 V, 0 - ± 15 V, 1 A adjustable by means of coarse & fine controls.
  • Distortion Meter, Frequency Range: 20Hz to 20 KHz
  • 8 Bit Variable Data Generator: Output : 8 bit (variable) Clock Frequency : Internal : 240 KHz, External : up to 1 MHz Rise Time : 80 ns approx. Power Supply : 220 V ±10 %, 50 Hz / 60 Hz on request Power consumption : 2 VA (approx.)

Major Equipment:-

  • Digital Storage Oscilloscope (DSO), 50MHz, 2 Channels, 4 Trace, 250MSa/s Real-Time and 25GSa/s Equivalent-Time Sampling
  • Digital Storage Oscilloscope (DSO), 100MHz, 2 Channels, 4 Trace, Real-Time Sample Rate 1.0SG/s
  • Spectrum Analyser Frequency Range: 150KHz to 1050MHz 4½ Digit Display: Centre & Marker Frequency, 0.1MHz Resolution Amplitude Range: -100dBm to +13dBm Filters : 20KHz, 400KHz & Video Filter AM /FM Demodulator Included Full Range Built-in Tracking Generator : 0.15MHz to 1050MHz.