Advance Communication Lab

Incharge
Dr Rajiv Kumar Singh
Lab Area:390 Sqfeet
Room Number: EC 201 B

Lab Faculty: Er Gayatri Tiwari / Anurag Yadav

Lab Instructor: Mr Tejveer Singh

Lab Staff: Mr Jai Krishan Tiwari

Courses Covered

  • REC 751-Optical Communication & Networking Lab 

 List of Experiment

1. To study the optical fiber link using Benchmark.
2. To study the component detail of optical fiber trainer kit ST-2502
3. The study of a 650nm fiber optic analog link.
4. The study of a 650nm fiber optic digital link.
5. Study of intensity modulation technique using Analog input signal.
6. Study of intensity modulation technique using digital input signal.
7. To measure propagation or attenuation loss in optical fiber.
8. To measure bending losses in optical fiber.
9. To measurement of the Numerical aperture (NA) of the fiber.
10. Measurement of optical power by using Optical Power Meter.
11. Measurement of propagation loss using Optical Power Meter.

Networking Lab
1. To study Mobile Phone Trainer kit ST2132.
2. To study Code Division Multiple Access (CDMA)- Direct Sequence

Spread Spectrum (DSSR) - BER ST- 2131A.

Beyond the Syllabus Experiments:
1. Setting up Fiber optic voice link using frequency modulation.
2. Setting up of fiber optic voice link using intensity modulation
3. To set up the pulse width modulation system.

Softwares Available:

  • MATLAB

List of Recent Equipments

TDM-PAM TRANSMITTER AND RECEIVER

Crystal Frequency : 8 MHz, Analog Input Channels : 4 channels, Multiplexing : Time Division Multiplexing, Modulation : Pulse Amplitude Modulation, On Board Analog Signal : 500 Hz, 1 KHz, 2 KHz and 4 KHz,(Sine wave synchronized to sampling pulse) Adjustable amplitude and separate variable DClevel, Sampling Rate : Four sampling signals 32, 40, 50 & 80 KHz/ channel (switch selectable),Sampling Pulse : With duty cycle variable from 0-90% in decade steps. Clock Regen. at Receiver: Using PLL Test points : 55 nos. Interconnections : 2 mm Sockets, Mains Supply : 110-220V, 50Hz/60 Hz, Dimensions (mm) : W 326 x D 252 x H 52,

Operating Conditions : 0-40 C, 85% RH, Included Accessories 2mm Patch cord 16"-10 nos. Tech Book Power Supply - 1 no Mains cord - 1 no.

DATA FORMATTING & CARRIER MODULATION TRANSMITTER

Crystal Frequency : 4.096 MHz Data formats : NRZ (L), NRZ (M), RZ, AMI, RB, Biphase (Manchester), Biphase (Mark).Carrier modulation : ASK, FSK, PSK, DPSK, QPSK On-board carrier : Sine waves synchronized to transmitted data at 1.6 MHz,960 KHz, (0 deg. phase) 960 KHz, (90 deg. phase) Test Points : 43 nos Power Supply : 110-220V, 50/60 Hz. Power Consumption : 4VA (approximately) Interconnections : 2 mm sockets Product Tutorials : Online (Theory, procedure, reference results, etc)Dimensions (mm) : W 326 x D 252 x H 52 o Operating Conditions: 0-40 C, 85% RH Included Accessories 2mm Patch Cord 16" : 30 nos. 2mm Patch Cord 32" : 4 nos. Mains Cord& Tech Book Power Supply:1 no.

CARRIER DEMODULATION & DATA REFORMATTING RECEIVER

Input : Carrier Demodulation : ASK – Diode Detector  FSK – PLL Detector PSK – Square Loop Detector QPSK – Fourth Power Loop Detector Power Consumption : 6 VA (approximately) Test Points : 39 nos Interconnections : 2 mm Sockets

Power Supply : 110-220V, 50/60 Hz Product Tutorials : Online (Theory, procedure, reference results, etc) Dimensions (mm) : W 326 x D 252 x H 52 Operating Conditions : 0-40 C, 85% RH Included Accessories Patch cord 16" : 30 nos. Patch cord 32" : 4 nos. Tech Book Power Supply & Mains Cord : 1 no.

FOUR CHANNEL TDM-PCM TRANSMITTER & RECEIVER

Modulation & Demodulation Techniques: Two channel TDM-PCM, Four channel TDM-PCM. Internal Signal Generator: Four dedicated Direct Digital Synthesizer Generators for each Channel. Types of Signal: Sine, Triangle, Arbitrary signal. Frequency: 500Hz, 1KHz, 1.5KHz, 2KHz, 3KHz. SMD LED Indicators: 54 nos. for DDS signal selection DDS signal frequency selection, Sampling selection, Technique selection Interconnect path Crystal Frequency: 8MHz. Sampling Frequencies: 8KHz, 16KHz, 32KHz. TDM techniques based on: Bell lab system. Selection Mode: Push switches Number of Test Points: 40 nos. Low Pass Filter: 4nos. Cut-off frequency-5KHz. Power Supply: 110V - 260V AC, 50/60Hz. Operating Conditions: 0-40 C, 85% RH. Included accessory 2mm Patch cord - 2nos.

UNDERSTANDING MSK, GMSK, FSK, GFSK, MODULATOR AND DEMODULATOR WITH AWGN CHANNEL NOISE AND BER

Modulations: Continuous Phase FSK (CPFSK), Minimum Shift Keying (MSK), Gaussian Frequency Shift Keying (GFSK), Gaussian Minimum Shift Keying (GMSK) etc. Software programmable data rate up to 10 /20/30 10Mbps. Software programmable 2, 4, 8 array FSK. Software programmable modulation index h (0 to 10) On-board digital data pattern generator as a test pattern Gaussian Filter BT product is BT= 0.3. Built in real-time data acquisition system with time domain signal analysis. Additive White Gaussian Noise with Normal distribution up to 4.5 times the standard deviation using Box-Muller algorithm. Two channel Additive White Gaussian Noise Generator with 10 bits/sample/channel I & Q Channel DACs-10 [email protected] Sampling rate 125 MSPS maximum Anti aliasing low pass filter with 3dB bandwidth of I & Q channel filter:  Sallen Key 6-pole Butterworth with cut-off frequency 13MHz. BER measurement using actual bit errors with a known digital data test sequence at the transmitter end More than 10nos. of test points and 2 BNC connector for analysis using external Oscilloscope & Spectrum Analyzer Mains Supply : 110-220 V AC, 50/60Hz  Operating Conditions : 0-40 C, 80% RH. Included Accessories: Power Supply: 1 no. Patch cord: 2 nos. Host to Device USB cable: 2 no. BNC to BNC cable: 4 nos. Power cord: 1 no.