Communications

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Communications
8-Bit Binary Data Generator
The 7411 can be used with the 7406 and the 7407 as a data input generator. The 7411 can also used as an 8-bit variable TTL data generator independently. The 7411 can produce an external clock (TTL) up to 1MHz that is available from at the clock out socket on the front of the unit. Normally it operates on an internal 240KHz clock.

Key Features
- Continuous data output (8-bit variable)
- Clock Output
- Compact and Light
(0 reviews)
Communications
Mobile Phone Trainer
The Mobile Phone Trainer provides basic theory and working fundamentals of a 2G handset based on one of the most popular handsets, the Nokia 3310/3315. The MPT provides network, power supply, charging and user interface circuits for the detailed block study

Experiments
- To study and measure frequency band
- To study and measure the GMSK signals such as Tx I /Q, Rx I /Q
- To study and observe the system CLK
- Observation of Audio signal
- To study and measure the Power supply
- Study of charging phenomena with fault insertion
- Study and measure PWM signal of Ul circuit such as Vibrator, LED, Buzzer
- Measurement of LCD with fault insertion
- Keypad study with fault insertion
- Observe and measure of the SIM Card CLK with fault insertion
Key Features
- Real time Mobile Operation
- Full understanding of mobile phone working
- Frequency measurement and band verification
- Provides study of all sections in mobile phone
- TX/RX Frequency measurement
- 2G technology and GMSK signals
- GSM data rate
- Detail study of User Interface Control Signals
- Detail study of SIM Operation
- Battery identification and charging study
- Switched Faults
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Communications
Pulse Amplitude Modulation/Demodulation Trainer
The unit is one of a range of digital communication trainers and provides all necessary inputs and connections for students to study pulse amplitude modulation / demodulation techniques, time division multiplexing and demultiplexing of signals and signal reconstruction.

Experiments:
- Study of pulse amplitude modulation technique
- Study of time division multiplexing and demultiplexing
- Study of PLL as frequency multiplier to generate clock from sync signal
- Study of effect of varying duty cycle of sampling pulse on signal reconstruction
- Study of 3 modes of operation to regenerate original signal
- 3 connections between transmitter and receiver (clock, sync & information)
- 2 connections (sync & information). Clock regenerated at receiver
- 1 connection (information only). Clock and sync derived at receiver
Key Features
- Crystal controlled Clock
- On-board signal generator (Synchronized) DC and Sine
- On-board pulse generator
- Demonstrates sampling and reconstruction as per Nyquist criterion
- 4 Analog input channels (TDM-PAM)
- Four switch selectable sampling frequencies
- Pulse duty cycle selectable
- Generation of clock at receiver by PLL system
- 4^th order Butterworth L. P. Filters
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Communications
Sampling and Reconstruction Trainer
The unit is one of a range of digital communication trainers and provides all necessary inputs and connections for students to study signal sampling and reconstruction techniques.

Experiments:
- Sampling and reconstruction of signal.
- The effect of II order and IV order low pass filter on reconstructed signal.
- The effect of sample amplifier and sample and hold amplifier on reconstructed signal.
- The Nyquist criteria for sampling and reconstruction of signal.
- The effect of sample /hold circuit on reconstructed signal
- Effect of sampling pulse duty cycle on the reconstructed signal in sample and sample hold output.
- Comparison responses of 2nd order and 4th order LPFs.
- Verification sampling and reconstruction data transmission scheme for
Key Features
- Functional blocks indicated via on board mimics
- Crystal controlled pulse generator
- Demonstrates sampling and reconstruction as per Nyquist criterion
- 6 Selectable sampling Frequencies
- Sampling Pulse Duty Cycle Selectable
- Internal / External sampling input selectable
- Separate Sample and sample/Hold outputs
- On-board 2^nd order and 4^th order low pass filters
(0 reviews)
Communications
Satellite Communication Trainer
The Satellite Communication Trainer 7272 provides an in-depth study of a basic satellite communication system. It consists of an Uplink Transmitter, Satellite Link and Downlink Receiver, which can be conveniently placed in the laboratory. The satellite can be placed at an elevated position if required. The satellite transponder receives signals from an Uplink Transmitter and retransmits at different frequencies to a Downlink Receiver. The Uplink and Downlink frequencies are selectable and carry three signals – Video, Audio, Voice and Data simultaneously. Any broadband signal, digital/analogue data or function generator waveforms can be communicated through the Satellite link.

Experiments:
- Understanding the concepts of satellite communication
- Establish a direct communication link between Uplink Transmitter and Down link Receiver using tone signal
- To setup an active satellite link and demonstrate link fail operations
- To establish an audio-video transmission through a Satellite link
- Study base-band analogue signal (voice) in satellite link
- Transmission and reception function generator waveforms through satellite link
- Transmission tone through satellite link
- Establish PC to PC communication using satellite Communication Link
Key Features
- Simultaneous Communication of three different signals at each up-linking frequency
- 2414-2468 MHz PLL microwave operation
- Crystal Control Frequencies
- Communicate Audio, Video, Digital data, PC data, Tone, Voice,
- Function generator waveforms
- Communication of external broadband digital and analogue data and base-band signals
- Choice of different transmitting and receiving frequencies
- Built-in microphone and speaker for Voice and Audio link
- Detachable Dish Antenna at each station
- Facility to attach Analogue/Digital communication kits
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Communications
Telephone Trainer System
The Telephone Training System (TTS) helps students to understand the basic concept and functional working of a Telephone system. An onboard mimic is provided that details the various blocks of a telephone and all components. Test points and LED’s are provided to allow students to observe various signals which helps them to understand the working of each block.

Key Features
- Functional blocks
- LED visualizations
- Switched faults
- On board telephone line connection facility
- High pass and low pass filters to study DTMF frequencies
- On/Off Hook Switch, Dialler, Ringer, Speech Processing Section
- DTMF (Tone) and Pulse Dialling
- Test Points are provided to observe isolated Dual Frequency output during DTMF Dialing
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Communications
Transmission Line Trainer
In telecommunications transmission lines are used to convey signals from one point to another. The line properties become very important especially in multi-channel systems. The TLT is a unique design for experimenting with various properties of a transmission line. The unit provides the basic concepts of a coaxial line and includes all devices and accessories required to conduct the experiments.

Experiments:
- Measuring the Characteristics of a Line
- Measuring the Input Impedance of the Line
- Measuring the Attenuation of a Line
- Phase Displacement between the Current and voltage at input of a Line
- Frequency characteristic of the Line
- Stationary Waves
- Signal Phase Shift along the Line
- Fault Localization within the Line
- Line under Pulsed condition
Key Features
- 100m coaxial line
- On board test generators and terminating resistances.
- Test points
- Functional block indicated via on board mimic
(0 reviews)