Digital Communication Trainers

(ACT-01) - ANALOG SAMPLING & RECONSTRUCTION KIT

Features:

  • Provides Synchronized Sine waveform output of Frequency 1 KHz & 2 KHz.
  • With Amplitude adjustments of 0-5V p-p
  • Switch selectable sampling frequency of 2,4,8,16,32 KHz.
  • Provision for External sampling Input up to 40 KHz with amplitude of 5V.
  • On-board features Sample Circuit/Output, Sample & Hold Circuit/Output
  • Switch selectable Sampling Duty cycle of 0-90% in steps
  • 2nd & 4th order Low pass filter with cut off frequency of 3.4 KHz.
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(ACT-02) - PAM/PWM/PPM MODULATION/DEMODULATION KIT

Features:

  • Provides Sine waveform output of 250Hz, 500Hz, 1 KHz, and 2 KHz with
  • Amplitude adjustments of 0 - 5Vp-p
  • Switch selectable sampling clock of 4, 8, 16, 32 KHz.
  • On-board features Analog Sample Circuit/Output, Sample & Hold Circuit/Output, Flat Top Circuit/Output
  • 4th order Butterworth Low pass filter with cut off frequency of 3.4 KHz.
  • PAM, PWM,PPM modulation & demodulation
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(ACT-03) - TDM Pulse Amplitude Modulation & Demodulation Kit

Features:

  • Provides Sine waveform output of 250Hz, 500Hz, 1 KHz, and 2 KHz. With Amplitude adjustments of 0 - 5Vp-p.
  • On board 0 to 5V DC source with Amplitude adjustments.
  • Sampling rate of 32 KHz/channel with 8KHz. Channel Identification Signal.
  • On-board features Four Analog Channels TDM Multiplexing/De-multiplexing
  • Clock regeneration at receiver using PLL.
  • 4th order Butterworth Low pass filter with cut off frequency of 3.4 KHz.
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(ACT-04) - TDM PULSE CODE MODULATION KIT

Features:

  • Provides Sine waveform output of 500Hz, 1 KHz with Amplitude adjustments of 0 - 5Vp-p.
  • Two Nos. of variable DC source with Amplitude adjustments.
  • Mode of Operation Fast (240 KHz/Channel approx) & slow (1Hz. /channel approx.)
  • 2 Channel Time Division multiplexed Pulse Code Modulation Transmitter.
  • None, Even, Odd, Hamming Parity selections
  • Pseudo random sync. Code generator for FRAME Synchronization.
  • PLL for Bit synchronization.
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(ACT-05) - TDM PULSE CODE DEMODULATION KIT

Features:

  • 2 Channel Time Division demultiplexed Pulse Code Modulation Receiver.
  • Mode of Operation Fast (240 KHz/Channel approx) & Slow (1Hz. /channel approx.)
  • Pseudo random sync. Code generator for FRAME Synchronization.
  • Receiver clock generation using PLL
  • Error Detection of None, Even, Odd, Hamming
  • Error Correction using Hamming Code technique
  • None, Even, Odd, Hamming Parity selections
  • Two Nos. of 4th order Butterworth Low pass filter with cut off frequency of 3.4 KHz.
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(ACT-06) - Data/Adaptive Data Modulation & Demodulation Kit

Features:

  • Provides Synchronized Sine waveform output of 250Hz, 500Hz, 1 KHz and 2 KHz with Amplitude adjustments of 0 - 4Vp-p.
  • Switch selectable sampling clock of 8, 16, 32,64 KHz.
  • Modulation & Demodulation Techniques using Delta modulation, Sigma Delta modulation, Adaptive Delta modulation, CVSD modulation
  • On-board m-law Compander and Expander
  • 2nd & 4th order Butterworth Low pass filter with cut off frequency of 3.4 KHz.
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(ACT-07T) - DATA CONDITIONING KIT

Features:

  • 8 bit variable NRZ-L pattern Data Simulator using 8 way DIP Switch.
  • Carrier Generator generating frequency of 2MHz (0°), 1MHz (0°) & 1MHz (180°)
  • Data Format (Coding) using NRZ(Level), NRZ(Mark), NRZ(Space), Biphase (Manchester), Biphase (Mark), Biphase (Space), URZ, AMI.
  • Carrier Modulation Techniques using ASK modulation, FSK modulation, PSK modulation
  • On-board features of Uni-polar to Bipolar conversion, Bipolar to Uni-polar conversion.
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(ACT-07R) - DATA RE-CONDITIONING KIT

Features:

  • Data Format (De-Coding) using NRZ(Level), NRZ(Mark), NRZ(Space), Bi-phase (Manchester), Bi-phase (Mark), Bi-phase (Space), URZ, AMI.
  • Carrier Demodulation Techniques using Rectifier Diode for ASK modulation, PLL Detector for FSK modulation, Square Loop Detector for PSK modulation
  • On-board features Receiver Clock generated using PLL
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(ACT-07) - LINE CODDING & DECODING KIT

Features:

  • 8 bit variable NRZ-L pattern Data Simulator using 8 way DIP Switch.
  • Data Format (Coding) using NRZ(Level), NRZ(Mark), NRZ(Space), Biphase (Manchester), Biphase (Mark), Biphase (Space), URZ, AMI.
  • On-board features of Uni-polar to Bipolar conversion, Bipolar to Uni-polar conversion.
  • Data Format (De-Coding) using NRZ(Level), NRZ(Mark), NRZ(Space), Bi-phase (Manchester), Bi-phase (Mark), Bi-phase (Space), URZ, AMI.
  • On-board features Receiver Clock generated using PLL
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(ADCT-01) - BPSK/DPSK & DEPSK MODULATION/DEMODULATION KIT

Features:

  • Provides synchronized Sine waveform output of 500KHz(0 deg.), 500KHz(180 deg.)
  • On board 8 bit variable NRZ-L pattern Data Simulator using 8 way DIP switch.
  • Clock frequency of 250 KHZ
  • Data Format (Coding) of NRZ-L & Differential Encoded NRZ-L.
  • Carrier Modulation Techniques using BPSK, DPSK, DEPSK modulation
  • On-board features Square Looping Technique used in Demodulation section
  • Carrier Demodulation Techniques using BPSK, DPSK & DEPSK Demodulation
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(ADCT-02) - QPSK/DQPSK Modulation Kit

Features:

  • On board 8 bit variable NRZ-L pattern Data Simulator using 8 way DIP switch.
  • Clock frequency of 250 KHZ .
  • Provides synchronized Sine waveform output of 500KHz(0 deg.), 500KHz(90 deg.), 500KHz(180 deg.), 500KHz(270deg.)
  • Data Format (Coding) using NRZ-L technique
  • Dibit Pair (I & Q), Differential Encoding of I & Q Bits.
  • Carrier Modulation Techniques QPSK, DQPSK modulation
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(ADCT–03) - QPSK/DQPSK Demodulation Kit

Features:

  • Data Format (De-Coding) using NRZ-L technique
  • Dibit Pair (I & Q), Differential Encoding of I & Q Bits.
  • Carrier Demodulation Techniques using QPSK, DQPSK Demodulation
  • On-board features of Receiver Clock generated by PLL method
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(ADCT-05) - QAM/DQAM MODULATION TRAINER

Features:

  • Provides synchronized Sine waveform output of 500KHz(0 deg.), 500KHz(90 deg.), 500KHz(180 deg.),500KHz(270 deg.)
  • 24 bit variable NRZ-L pattern generated depending on the position of the three nos. of 8-dit Data Switch provided using 8 way DIP Switch.
  • Clock Frequency is of 250 KHz.
  • Data Format (Coding) using NRZ-L technique
  • Tribit encoded data I , Q & C
  • Differential Encoded I & Q Bits.
  • Carrier Modulation Techniques using QAM, DQAM Modulation
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(ADCT-06) - QAM/DQAM Demodulation Kit

Features:

  • Receiver clock generated using PLL method
  • Data Format (Decoding) using NRZ-L technique
  • Tribit Decoded data (I ,Q & C)
  • Differential Decoded I & Q Bits.
  • Carrier Demodulation Techniques using QAM,DQAM Demodulation
  • On-board features QAM/DQAM Demodulation using PLL and Envelop detectors.
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(ADCT-07) - DPCM/ADPCM MODULATION & DEMODULATION TRAINER

Features:

  • Provides Sine waveform output of 500 Hz with variable Amplitude of max.0-4Vp-p.
  • On board Clock of frequencies 64 KHz, 128 KHz, 256 KHz and 512KHz
  • Sampling Clock Frequency of 16 KHz and Amplitude of 5V
  • On-board Block features DPCM modulation using sampler, quantizer and linear predictor, Buffer is provided using LF353
  • DPCM demodulation using linear predictor, Integrator and Low pass Filter
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(ADCT–08) - MSK MODULATION AND DEMODULATION KIT

Features:

  • On Board synchronized RF carrier signal generators with frequencies of 120 KHz, 200 KHz.
  • 8 bit Digital Data generator to generate any binary input word using 8-way DIP Switch
  • On board two Balanced Modulator Circuit
  • On board Demodulator PLL Detector Circuit
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