Communication Lab

Incharge
Dr R.C.S. Chauhan
Lab Area: 870 Sqfeet
Room Number: EC 212

Lab Faculty: Er Gayatri Tiwari

Lab Instructor: Mr Tejveer Singh

Lab Staff: Mrs Sarita Devi

Courses Covered

  • REC 552/EC 552-Communication Lab-I
  • REC 652/EC 652-Communication Lab-II

List of Experiments

REC 552: COMMUNICATION LAB – 1
1. To study DSB/ SSB amplitude modulation & determine its modulation
factor & power in side bands.
2. To study amplitude demodulation by linear diode detector.
3. To study frequency modulation and determine its modulation factor.
4. To study PLL 565 as frequency demodulator.
5. To study sampling and reconstruction of Pulse Amplitude modulation
system.
6. To study the Sensitivity, Selectivity, and Fidelity characteristics of super
heterodyne receiver.
7. To study Pulse Amplitude Modulation
a. using switching method
b. by sample and hold circuit
8. To study Pulse Width Modulation and Pulse Position Modulation.
9. To study pulse code modulation and demodulation.
10. Study and design and implement an FM radio receiver in 88-108 MHz.

Experiments Beyond the Syllabus:
1. SSB-SC modulation and demodulation using MATLAB
2. To study the characteristics of delta modulation and demodulation kit.
3. To study the Pulse Amplitude Modulation and Demodulation in Flat Top Sampling

REC 652 COMMUNICATION LAB – II

List of Experiments

1. To construct a Square wave with the help of Fundamental Frequency and its Harmonic component.
2. To generate and demodulate amplitude shift keyed (ASK) signal using MATLAB.
3. To generate and demodulate phase shift keyed (PSK) signal using MATLAB.
4. To generate and demodulate frequency shift keyed (FSK) signal using MATLAB.
5. To generate and demodulate quadrature phase shifted (QPSK) signal using MATLAB.
6. To simulate bit error rate performance of DPSK modulation using MATLAB.
7. To perform the simulation of convolutional coding scheme and hamming code scheme using MATLAB.
8. To perform the simulation of Linear Block coding scheme using MATLAB.
9. Study of pulse data coding & decoding techniques for NRZ and RZ formats using MATLAB.
10. Study of Manchester coding and Decoding using MATLAB

Experiments beyond the Syllabus
1. To Study & understand the operation of the Pulse code modulation.
2. To Study & understand the operation of the DPCM.
3. Study of spectral characteristics of PWM

Softwares Available:

  • MATLAB

List of Recent Equipments

DIGITAL STORAGE OSCILLOSCOPE 50MHZ

50MHz Digital Storage Oscilloscope It should have following features:Bandwidth 50MHz, Real-time Sampling Rate 500 MSa/s, Equivalent Sampling Rate 50GSa/s., Memory Depth: 32Kpts, Trigger types: Edge, Pulse width, Video, Slope, Alternative, Unique Digital Filter function and Waveform Recorder function, Support pass/fail function., 32 parameters Auto Measure function, Save/recall types: Setups, Waveforms, CSV file, Picture, Waveform Intensity and grid brightness can be adjusted, Nationwide Service, Standard configuration port:USB Host: Support USB flash driver save/recall function and update firmware, USB Device: Support PictBridge compatible printer and support PC remote control, RS232, Pass/Fail Output, It should have following Technical Specifications:Bandwidth :50MHz,

Realtime Sample Rate:500MSa/s (Single Channel), Equivalent Sample Rate 50GSa/s, Number of Channels :2 CH +1 Ext, Memory Depth : 32Kpts (Single Channel), Acquisition Modes:Normal/Average/Peak Detect, Average:Selectable from 4 to 256, Vertical Sensitivity : 2mV/div - 10V/div, Vertical Resolution :8 bits, Input Impedance:1 MW ±2% II 17 pF ±3 pF,

Input Coupling :       DC, AC and GND, Maximum Input Voltage            : ±400Vpp,

Trigger Sources:       CH1, CH2, Ext, Ext /5, AC Line, Trigger Modes Auto, Normal, Single,

Trigger Type :Edge, Pulse Width, Slope, Video, Alternate, Auto Measure:FOV Shoot, RPRE Shoot, FPRE Shoot, Rise time, Fall time, Freq, Period, Vpp, Vmax, Vmin, Vamp, Vtop, Vbase, Vavg, Mean, Crms, Vrms, ROVShoot, + Wid, -Wid, +Dut, -Dut, BWid, Phase, FRR, FRF, FFR, FFF, LRR, LRF, LFR, LFF Cursor Measure             :Manual, Track and Auto measure,                                                                           mode Maths :+, – , ×, /, FFT, Waveform Interpolation :Sin x/x, Linear, Storage       :Internal:2 reference waveforms,  20 waveforms and 20 Setups USB : BMP, CSV, Waveforms, Setups,

Communication Port :USB Host, USB Device, RS232, Pass/Fail, Sample Types      :Real Time and Equivalent Time, FFT:Window: Hanning, Hamming, Blackman, Rectangular, Measure Display Modes :Main, Window, Window Zoom, Scan, X-Y, Menu Display :2 sec, 5 sec, 10 sec, 20 sec, Infinite, Display :7 inch TFT Color LCD Display, Power :100 - 240V AC, 50VA Max,

Accessories :1:1/10:1 Probe (2 pcs), Power Cord, USB Cable, Easy , Scope Software,  Warranty at least 3 – years

FREQUENCY DIVISION MULTIPLEXER/DEMULTIPLEXER

Crystal Frequency : 4.096 MHz, Carrier Generator : Sine wave 100 KHz & 200 KHz, Modulating Input Frequency : Sine wave 200 Hz-10 KHz (variable), Audio Input Amplifier : Gain of 100 (approx.), Modulator / Demodulator : DSBSC Modulator/Demodulator, Low Pass Filters : Second Order Butterworth filters with a cut off frequency of 10 KHz, Audio Output Amplifier : Output Amplifier with a gain of 20, Test points : 30 nos, Interconnection : 2mm banana socket, Power Supply : 220V/110V, 50 Hz / 60 Hz, Power Consumption : 3 VA (approx.), o Operating Conditions : 0-40 C, 85% RH, Included Accessories :Patch cord 16” : 15 nos.Headphone : 2 nos.Microphone : 2 nos.Mains cord : 1 no.

ASK, FSK, BPSK, DBPSK MODULATOR &  DEMODULATOR

Modulation & Demodulation Techniques: ASK, FSK, BPSK, DBPSK. Internal Data Generator: Digital data. Data Pattern: 8-Bit, 16-Bit, 32-Bit, 64-Bit. Frequency: 2KHz, 4KHz, 8KHz, 16KHz. Internal Carrier Generator: Direct Digital Synthesized. Carrier Signal: Sine. SMD LED Indicators: 24 nos. for Digital data selection, data frequency selection and technique selection. Number of Test Points: 39 nos. (Gold plated). Crystal Frequency: 8MHz. Selection Mode: Push switches. Power Supply: 110V-260V AC, 50/60Hz. Operating Condition: 0-40 C, 85% RH Included accessories: 2mm Patch cord - 1no. Power Supply module - 1no

QPSK, OQPSK, DQPSK MODULATOR & DEMODULATOR

Modulation & Demodulation Techniques: QPSK, OQPSK, DQPSK. Internal Data Generator: Digital data. Data Pattern: 8-Bit, 16-Bit, 32-Bit, 64-Bit. Frequency: 2KHz, 4KHz, 8KHz, 16KHz. Internal Carrier Generator: Direct Digital Synthesized. Carrier Signal: Sine, Cosine. SMD LED Indicators: 25 nos. for Digital data selection, data frequency selection and technique selection. Number of Test Points: 57 nos. Crystal Frequency: 8MHz.Selection Mode: Push switches. Power Supply: 110V-260V AC, 50/60Hz. Operating Condition: 0-40 C, 85% RH. Included accessories: 2mm Patch cord- 1no. Power Supply module- 1no.

PAM, PPM, PWM TECHNIQUES AND LINE CODING TECHNIQUES

Modulation & Demodulation Techniques: PAM, PWM, PPM. Line Coding Techniques Internal Signal Generator: Direct Digital Synthesizer. Types of Signal Sine, Square, Triangle, Arbitrary Signals. Frequency: 500Hz, 1KHz, 2KHz, 3KHz. External Signal: Types of Signal: Sine, Square, Triangle, Arbitrary Signals. Maximum Input Voltage: 3Vpp (Max.) +1.5V DC offset. Frequency: 500Hz to 3.5KHz Sampling/Ramp Frequencies:  1.25KHz, 2.50KHz, 5KHz,  9.80KHz, 19.53KHz, 39.06KHz,78.13KHz. SMD LED Indicators: 46 nos. for DDS signal selection DDS signal frequency selection Sampling selection Technique Selection Interconnect path Crystal Frequency: 20MHz, Selection Mode:  Push switches, Random Data: 8 Bit/ 16 Bit/ 32 Bit (For line Coding). Data Frequency: 500Hz, 1KHz, 2KHz, 3KHz. Test Points: 29 nos. Low Pass Filter: Cut-off frequency-5KHz Power Supply: 110V - 260V AC, 50/60Hz. Operating Condition: 0-40 C, 85%RH. Included Contents: 2mm Patch cord - 2nos.

PCM, DPCM, CVSD MODULATOR AND DEMODULATOR

Modulation & Demodulation Techniques:  PCM, DPCM, CVSD. Internal Signal Generator: Direct Digital Synthesizer. Types of Signal:  Sine, Square, Triangle, Arbitrary signals. Frequency: 500Hz, 1KHz, 2KHz, 3KHz.External Signal: Types of Signal:  Sine, Square, Triangle, Arbitrary Signals. Maximum Input Voltage:  3Vpp (Max.). +1.5V DC. Offset Frequency:  500Hz to 3.5KHz. SMD LED Indicators: 44 nos. for DDS signal selection, DDS signal frequency selection, Sampling selection Technique selection Interconnect path. Transmission Effect:  Attenuation (7dB & 10dB) Noise Filter. Crystal Frequency:  8MHz. Sampling Frequencies: 4KHz, 8KHz, 16KHz, 32KHz. Line Speed: 32KHz, 64KHz, 128KHz, 256KHz. Selection Mode:  Push switches. Number of Test Points:  38 nos. Low Pass Filter Cut-off frequency- 5KHz. Power Supply:110V-260VAC, 50/60Hz.Operating Condition: 0-40 C, 85% RH Included Contents : 2mm Patch cord - 2nos

DELTA, ADAPTIVE DELTA, SIGMA DELTA MODULATOR AND DEMODULATOR

Modulation & Demodulation Techniques: Delta, Adaptive Delta, Sigma Delta First order, Sigma Delta Second order. Internal Signal Generator: Direct Digital Synthesizer. Types of Signal: Sine, Square, Triangle, Arbitrary signals. Frequency: 500Hz, 1KHz, 2KHz, 3KHz. External Signal: Types of Signal: Sine, Square, Triangle, Arbitrary signals. Maximum Input Voltage: 3Vpp (Max.) +1.5V DC offset. Frequency: 500Hz to 3.5KHz. SMD LED Indicators: 48 nos. for DDS signal selection, DDS signal frequency selection Sampling selection Technique selection Interconnect path. Transmission Effect: Attenuation (7dB & 10dB) Noise Filter. Crystal Frequency:  8MHz. Sampling Frequencies: 16KHz, 32KHz, 64KHz, 128KHz, 256KHz.  Integrator step: Normal & 3 times. Selection Mode: Push switches. Number of Test Points: 46 nos. (Gold plated). Low Pass Filter: Cut-off frequency-5KHz.Digital Filter: Decimation filters (16:1).  Power Supply: 110V - 260V AC, 50/60Hz.Operating Conditions: 0-40 C, 85% RH. Included accessories: 2mm Patch cord 2nos