DSB SSB TRANSMITTER TRAINER

Scope of learning :

• Study of carrier frequency generation.
• Study of DSB & SSB AM generation & Transmission.
• Study of Transmitter circuits.
• Study of Modulation index.

Technical specifications :
On board :

• 8 Switched Faults.
• Crystal Controlled Carrier Frequency.
• On - board Audio Modulator,
• Carrier Frequency Generation,
• Antenna & Speaker.

Power supply :

• Fixed DC Power Supplies +15V DC, 250mA
• Operated on Mains power 230V, 50Hz +10%

Components mounted on the panel are :

• IC
• Capacitors
• Resistors
• Diode

Salient Features :

1. Front panel built with high class insulated Printed Circuit Board sheet with well printed circuits and symbols.
2. Instruction manual.
3. Connections are brought out through 2mm Sockets.
4. Patch Cords 2mm.
5. The trainer is housed in ABS Plastic cabinet/Wooden Cabinet
6. Size of the trainer set 12”x10”

Optional accessories :

• CRO

DSB SSB RECEIVER TRAINER

Scope of learning :

• Study of DSB & SSB AM reception & detection by diode /product detectors
• Study of AGC
• Study of Receiver tuned circuit
• Study of Sensitivity, Selectivity & Fidelity of Receiver

Technical specifications :
On board :

• Frequency Range : 980 KHz to 2.060 Mhz
• Intermediate Frequency (IF) : 455 Khz
• Input Circuits :
  1. RF amplifier
  2. Mixer
  3. Local oscillator
  4. Beat frequency oscillator
  5. IF amplifier 1
  6. IF amplifier 2
• Tuning: With variable capacitor (ganged) dial marking on board
• Power supply :
  1. Fixed DC Power Supplies +15V DC, 250mA
  2. Operated on Mains power 230V, 50Hz +10%
• Components mounted on the panel are :
  1. IC
  2. Capacitors
  3. Resistors
  4. Diode
• Salient Features : Front panel built with high class insulated Printed Circuit Board sheet with well printed
• circuits and symbols.
• Instruction manual.
• Connections are brought out through 2mm Sockets.
• Patch Cords 2mm.
• The trainer is housed in ABS Plastic cabinet/Wooden Cabinet.
• Size of the trainer set 12”x10”

FM TRANSMITTER AND RECEIVER TRAINER

Scope of learning :

• Study of Frequency Modulation using Varactor modulator
• Study of Frequency Modulation Using Reactance Modulator
• Study of Operation of Detuned Resonant Circuit
• Study of Operation of Quadrature Detector
• Study of Operation of Phase-Locked Loop Detector
• Study of Operation of Foster - Seeley Detector
• Study of Operation of Ratio Detector

Technical specifications :
On board :

• 8 switched faults.
• Audio Oscillator : With adjustable amplitude & frequency (300 Hz - 3.4 Khz)
• Two Types of FM Modulator:
  1. Reactance Modulator (with carrier frequency adjustment)
  2. Varactor Modulator (with carrier frequency adjustment)
• Mixer / Amplifier: Allows FM input signal to be amplitude modulated by a noise input prior to demodulation, with gain adjustment.
• Transmitter Output Frequency. : 455 Khz
• Five types of FM demodulator :
  1. Detuned Resonant Detector
  2. Quadrature Detector
  3. Foster - Seeley Detector
  4. Ratio – Detector
  5. Phase Locked Loop Detector
• Low Pass Filter Amplifier: 3.4 KHz cut off frequency. (with adjustable gain)
• Effect of noise on the detection of FM signal may be investigated.
• Power supply :
  1. Fixed DC Power Supplies +15V DC, 250mA
  2. Operated on Mains power 230V, 50Hz +10%
• Components mounted on the panel are :
  1. IC
  2. Capacitors
  3. Resistors
  4. Diode
• Salient features : Front panel built with high class insulated Printed Circuit Board sheet with well printed
• circuits and symbols.
• Instruction manual.
• Connections are brought out through 2mm Sockets.
• Patch Cords 2mm.
• The trainer is housed in ABS Plastic cabinet/Wooden Cabinet.
• Size of the trainer set 12”x10”

ANALOG SAMPLING AND RECONSTRUCTION TRAINER

• Scope of learning :
• Study the Sample signal and Sample/Hold signal and its reconstruction;
• Study the effects of different Sampling;
• Study the effects of 2nd and 4th Order low pass filters for the reconstruction of the
• signal frequencies on the reconstructed signal;
• Study the effects of Varying duty cycle of Sampling frequencies on the amplitude of the
• reconstructed signal

Technical specifications :

Generator :

1. Crystal controlled pulse generator.
2. Sine Wave Generator - Provides Synchronized Sine waveform output of Frequency 1 KHz & 2KHz.
3. Pulse Generator-Switch selectable sampling frequency of 2,4,8,16, 32 Khz,
4. Internal/ External sampling signal selectable

• Power supply :
  1. Fixed DC Power Supplies +12V,+5V DC, 250mA
  2. Operated on Mains power 230V, 50Hz +10%
• Components mounted on the panels are :
  1. IC
  2. Capacitors
  3. Resistors
  4. Diodes
• Salient features : Ront panel built with high class insulated Printed Circuit Board sheet with well printed
• circuits and symbols.
• Instruction manual.
• Connections are brought out through 4mm Sockets.
• Patch Cords 4mm.
• The trainer is housed in ABS Plastic cabinet.
• Size of the trainer set 12”x8”

DATA FORMATTING AND CARRIER MODULATION TRAINER

Scope of learning :

• Study of Coversion of NRZ data to other data formats NRZ(L), NRZ(M) RZ, AMI, RB, Biphase (Manchester), Biphase (Mark), Differentially encoded dibit pair
• Study of following Carrier Modulation Techniques and their comparison - ASK, FSK,PSK & QPSK

Technical specifications :
Generator :

• On-board Carrier generation circuit (Sine waves synchronized to transmitter data).
• On- board in phase and quadrate phase carrier for QPSK modulation. ? Different data conditioning formats NRZ (L), NRZ (M), RZ, Biphasic. (Manchester), Biphasic (Mark),
• AMI, RB, differentially encoded debit pair.
• FSK, PSK, ASK ,DPSK & QPSK carrier modulation. Variable carrier and modulation Off- Set. Variable carrier gain.
• On-board Unipolar to Bipolar conversion. On-board data inverter.

Power supply :

• Fixed DC Power Supplies +12V,+5V DC, 250mA
• Operated on Mains power 230V, 50Hz +10%

Components mounted on the panel are :

• IC
• Capacitors
• Resistors
• Diode

Salient features :

• Front panel built with high class insulated Printed Circuit Board sheet with well printed circuits and symbols.
• Instruction manual.
• Connections are brought out through 4mm Sockets.
• Patch Cords 4mm.
• The trainer is housed in ABS Plastic cabinet.
• Size of the trainer set 12” * 10”

TDM PULSE CODE MODULATION TRANSMITTER TRAINER

Scope of learning :

• Study of Pulse Code Modulation. Study the principles of ADC &DAC Study of Pseudo Random Sequences
• Study of effect of faults in Modulation & Demodulation Techniques.
• Study of Error Check Code Logic:

1. None Parity Coding.
2. Odd Parity Coding
3. Even Parity Coding
4. Hamming Coding

Technical specifications :

• Crystal Controlled Clock.
• On-board Sine wave generator (Synchronized)

Power supply :

• Fixed DC Power Supplies +12V,+5V DC, 250mA
• Operated on Mains power 230V, 50Hz +10%

Components mounted on the panel are :

• IC
• Capacitors
• Resistors
• Diode
• PCM Transmitter.
• Fast & Slow modes for real time operation and data flow examination. Error check code options (odd-even parity, Hamming Code).
• 4 Switched faults allow different Error Check Options.
• PC - PC Communication via RS 232 interface

Salient Features :

• Front panel built with high class insulated Printed Circuit Board sheet with well printed circuits and symbols.
• Instruction manual.
• Connections are brought out through 4mm Sockets.
• Patch Cords 4mm.
• The trainer is housed in ABS Plastic cabinet
• Size of the trainer set 12”x10”

Optional accessories :

• CRO

TDM PULSE CODE DEMODULATION RECEIVER TRAINER

Scope of learning :

• Study of PCM Demodulation Technique
• Study of Time Division Demultiplexing of PCM data
• Study of Clock Regeneration by PLL Study of Detection & Correction of Error induced by switched faults in the transmitter.
• Study of signal recovery in 3 connecting modes between transmitter & receiver
• Study of Importance of Clock and Frame Synchronization in PCM system Study of the effect of induced faults in receiver.

Technical specifications :
Generator :

• On board PLL for clock regeneration.
• On board sync code detector.

Power supply :

• Fixed DC Power Supplies +12V,+5V DC, 250mA
• Operated on Mains power 230V, 50Hz +10%

Components mounted on the panel are :

• IC
• Capacitors
• Resistors
• Diode
• Input accepts two channel multiplexed data. On board De-?multiplexed PCM Receiver.
• On board L.P. Filter.
• Fast & Slow modes for real time operation and data flow examination.
• Error check code options.
• Odd or Even Parity-?Single bit error detection.

Salient Features :

• Front panel built with high class insulated Printed Circuit Board sheet with well printed circuits and symbols.
• Instruction manual.
• Connections are brought out through 4mm Sockets.
• Patch Cords 4mm.
• The trainer is housed in ABS Plastic cabinet.
• Size of the trainer set 12”x10”

CDMA TRAINER

Scope of learning :

• To study theory of CDMA DSSS Modulation & Demodulation
• To generate CDMA-DSSS signal
• To demodulate CDMA-DSSS signal using BPS
• To study pseudo random bit sequence generation.

Technical specifications :
Generator :

• Direct Sequence Spread Spectrum (DSSS) generator and decoder
• Analog Modulators :
  1. Binary Phase Shift Keying (BPSK)Modulator
  2. Pulse Width Modulator
• Analog Demodulators :
  1. Binary Phase Shift Keying (BPSK) Demodulator
  2. Pulse Width Demodulator

Power supply :

• Fixed DC Power Supplies +12V,+5V DC, 250mA
• Operated on Mains power 230V, 50Hz +10%

Components mounted on the panel are :

• IC
• Capacitors
• Resistors