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BASIC COMMUNICATION TRAINERS   (Analog & Digital Communication Experiment Trainers)   BCT-900      Downloadable Data Sheet The BCT-900 trainer includes the basic modules to experiment on fundamental & higher level topics of a telecommunication course. The purpose of the modules is to enable the student to acquire a clear experimental view of the basic concepts and a familiarization with the operative aspects of the work in the telecommunication laboratory. This trainer combined the modules with experimental circuits. It can offer the beginner complete courses of basic communication. With the optional power supply and signal unit, oscilloscope or spectrum analyzer, Student can complete various experiments independently.   BCT-900 is a open-modular design, it enables can be extended experimental range.   LIST OF EXPERIMENTS   ANALOG COMMUNICATION MODULES  - RF Oscillator Experiment - Second Order LPF & HPF Experiment - AM Modulator Experiment - AM Demodulator Experiment - DSB-SC and SSB Modulator Experiment - DSB-SC and SSB Demodulator Experiment - FM Modulator Experiment - FM Demodulator Experiment - Frequency Converter - Signal Recovery     DIGITAL COMMUNICATION MODULES  - Analog to Digital Converter Experiment - Digital to Analog Converter Experiment - PWM Modulator Experiment - PWM Demodulator Experiment - FSK Modulator Experiment - FSK Demodulator Experiment - ASK Modulator Experiment - ASK Demodulator Experiment - PSK Modulator Experiment - PSK Demodulator Experiment   LIST OF MODULES   (A) Analog Communication Modules (ACT-1000) (1) ACT-1000-11 (Module One )         :        Second Order Active Filters and RF Oscillators (2) ACT-1000-12 (Module Two  )        :        AM Modulation and Demodulation (3) ACT-1000-13 (Module Three )      :        DSB-SC and SBB Modulation and Demodulation (4) ACT-1000-14 (Module Four )        :        FM Modulation and Demodulation (5) ACT-1000-18 (Module Eight )       :        Frequency Converter and Signal Recovery   (B) Digital Communication Modules (DCT-1000) (1) ACT-1000-17 (Module Seven )     :        ADC and DAC Converter (2) DCT-1000-22 (Module Two )     :        Pulse Width Modulation and Demodulation (3) DCT-1000-26 (Module Six )       :        ASK Modulation and Demodulation (4) DCT-1000-27 (Module Seven )  :        FSK Modulation and Demodulation (5) DCT-1000-28 (Module Eight )       :        PSK Modulation and Demodulation (C) Function Generator, DC Power Supply and RF Generator Module (ACT-1000-PG)   (A) Analog Communication Modules (ACT-1000) Curriculum Outline 1. Design and implementation of second order RF filters and RF oscillators. 2. Design and implementation of AM and FM modem. 3. Design and implementation of DSB/SC and SSB modem. 4. Design and implementation of FDM multiplexer and demultiplexer. 5. Design and implementation of frequency converter and signal recovery. Curriculum Objectives: 1. To understand the basic theory of analog communication system. 2. Design and implementation ability training of analog modem. 3. To understand the applications of balanced modulator circuit. 4. To understand the applications of analog modem. Lists Of Modules & Experiments Module One: Second Order Active Filters and RF Oscillators (ACT-1000-11) Chapter 1: Second Order Active Filters Experiment 1: Second Order Active Low-pass Filter (Low-pass -3 dB Frequency: 1 kHz - 3 kHz.) Experiment 2: Second Order Active High-pass Filter (High-pass -3 dB Frequency: 5 kHz ~ 10 kHz.) Experiment 3: Second Order Active Bandpass Filter (Center Frequency: 10 kHz - 100 kHz, Bandwidth: 6 kHz - 60 kHz.) Experiment 4: Second Order Active Bandstop Filter (Cutoff Frequency: 10 kHz - 100 kHz, Bandwidth: 6 kHz - 60 kHz.)   Chapter 2: RF Oscillators Experiment 1: Colpitts Oscillator (Oscillation Frequency: 1 MHz - 9 MHz.) Experiment 2: Hartley Oscillator (Oscillation Frequency: 500 kHz - 1.8 MHz.) Experiment 3: Crystal Oscillator (Oscillation Frequency: 500 kHz - 1.8 MHz.) Experiment 4: Voltage Controlled Oscillator (Oscillation Frequency: 3.5 MHz - 4 MHz.) Module Two: AM Modulation and Demodulation (ACT-1000-12) Chapter 3: AM Modulator Experiment 1: Transistor AM Modulator (Carrier Signal: 1.5 kHz - 2 kHz, Audio Signal: 500 Hz - 1 kHz.) Experiment 2: MC1496 AM Modulator (Carrier Signal: 500 kHz - 1 MHz, Audio Signal: 500 Hz -      1 kHz.)   Chapter 4: AM Demodulator Experiment 1: AM Diode Detector (Carrier Signal: 300 kHz, Audio Signal: 500 Hz - 2 kHz.) Experiment 2: AM Product Detector (Carrier Signal: 500 kHz - 1 MHz, Audio Signal: 500 Hz - 1 kHz.) Module Three: DSB-SC and SBB Modulation and Demodulation (ACT-1000-13) Chapter 5: DSE3-SC and SSB Modulator Experiment 1: DSB-SC Modulator (Carrier Signal: 100 kHz - 500 kHz, Audio Signal: 500 Hz - 1 kHz.) Experiment 2: SSB Modulator (Carrier Signal: 200 kHz, Audio Signal: 500 Hz - 1 kHz.)   Chapter 6: DSB-SC and SSB Demodulator Experiment 1: DSB-SC Product Detector (Carrier Signal: 100 kHz - 500 kHz, Audio Signal: 500 Hz - 1 kHz.) Experiment 2: SSB Product Detector (Carrier Signal: 200 kHz, Audio Signal: 500 Hz - 1 kHz.) Module Four: FM Modulation and Demodulation (ACT-1000-14) Chapter 7: FM Modulator Experiment 1 MC4046 FM Modulator (Carrier Signal: 20 kHz, Audio Signal: 1 kHz.) Experiment 2 LM566 FM Modulator (Carrier Signal: 20 kHz, Audio Signal: 500 Hz - 700 Hz.)   Chapter 8: FM Demodulator Experiment 1 MC4046 FM Demodulator (Carrier Signal: 20 kHz, Audio Signal: 1 kHz.) Experiment 2 LM565 FM Demodulator (Carrier Signal: 20 kHz, Audio Signal: 500 Hz - 700 Hz.) Module Seven: ADC and DAC Converter (ACT-1000-17) Chapter 13: Analog-to-digital Converter Experiment 1: ADC0804 Analog-to-digital Converter (Resolution: 8 bits, Analog Input Voltage: 0 V - 5 V.) Experiment 2: ADC0809 Analog-to-digital Converter (Resolution: 8 bits, Analog Input Voltage: 0 V - 5 V, Clock Frequency; 120 kHz.)   Chapter 14: Digital-to-analog Converter Experiment 1: R-2R Digital-to-analog Converter (Digital Input: 4 bits, Analog Output: 0 V - 5 V.) Experiment 2: Unipolar DAC 0800 Digital-to-analog Converter (Digital Input: 8 bits, Analog Output: 0 V - 5 V, Step Value: 0.019 V.) Experiment 3: Bipolar DAC 0800 Digital-to-analog Converter (Digital Input: 8 bits, Analog Step Value: 0.038 V.)   Module Eight: Frequency Converter and Signal Recovery (ACT-1000-18) Chapter 15: Frequency Converter Experiment 1: Frequency Multiplier (Carrier Signal: I Experiment 2: Up/Down Frequency Converter (Card Carrier Signal @ RF port: 120 kHz.)   Chapter 16: Signal Recovery Experiment 1: Carrier Signal Recovery Circ Experiment 2: Clock Recovery Circuit ( Clock Frequency: 5 kHz , (B) Digital Communication Modules (DCT-1000) Curriculum Outlines: 1. Design and implementation of ADC and DAC converter. 2. Design and implementation of PWM modem. 3. Design and implementation of ASK, FSK and PSK modem. Curriculum Objectives: 1. To understand the basic theory of digital communication system. 2. Design and implementation ability training of digital modem. 3. To understand the applications of balanced modulator circuit. 4. To understand the applications of digital modem. Lists Of Modules & Experiments Module Seven: ADC and DAC Converter (ACT-1000-17) Chapter 13: Analog-to-digital Converter Experiment 1: ADC0804 Analog-to-digital Converter (Resolution: 8 bits, Analog Input Voltage: 0 V - 5 V.) Experiment 2: ADC0809 Analog-to-digital Converter (Resolution: 8 bits, Analog Input Voltage: 0 V - 5 V, Clock Frequency; 120 kHz.)   Chapter 14: Digital-to-analog Converter Experiment 1: R-2R Digital-to-analog Converter (Digital Input: 4 bits, Analog Output: 0 V - 5 V.) Experiment 2: Unipolar DAC 0800 Digital-to-analog Converter (Digital Input: 8 bits, Analog Output: 0 V - 5 V, Step Value: 0.019 V.) Experiment 3: Bipolar DAC 0800 Digital-to-analog Converter (Digital Input: 8 bits, Analog Step Value: 0.038 V.)   Module Two : Pulse Width Modulation and Demodulation (ACT-1000-22) Chapter 3 PWM Modulator Experiment 1: uA741 Pulse Width Modulator Carrier Signal: 1.5 kHz - 2 kHz, Audio Signal: 500 Hz. Experiment 2: LM555 Pulse Width Modulator Carrier Signal: 5 kHz - 10 kHz, Audio Signal: 1 kHz.   Chapter 4 PWM Demudulator Experiment 1: Pulse Width Demodulator Carrier Signal: 5 kHz - 6 kHz, Audio Signal: 500 Hz - 700 Hz. Module Six : ASK Modulation and Demodulation (ACT-1000-26) Chapter 11 ASK Modulator Experiment 1: XR2206 ASK Modulator Carrier Signal: 20 kHz, Data Rate: 1 kbps. Experiment 2: MC1496 ASK Modulator Carrier Signal: 20 kHz - 100 kHz, Data Rate: 2 kbps.   Chapter 12 ASK Demodulator Experiment 1 : Asynchronous ASK Demodulator ( I ) (Using XR2206 as the modulated ASK signal) Carrier Signal: 20 kHz, Data Rate: 200 bps - 1 kbps. Experiment 2: Asynchronous ASK Demodulator ( II ) (Using MC1496 as the modulated ASK signal) Carrier Signal: 20 kHz, Data Rate: 200 bps - 1 kbps. Experiment 3: Synchronous ASK Demodulator Carrier Signal: 100 kHz, Data Rate: 200 bps - 2 kbps. Module Seven : FSK Modulation and Demodulation (ACT-1000-27) Chapter 13 FSK Modulator Experiment 1: XR2206 FSK Modulator Data Rate: 200 bps - 400 bps. Experiment 2: LM566 FSK Modulator Data Rate: 200 bps - 400 bps.   Chapter 14 FSK Demodulator Experiment 1: FSK Demodulator ( I ) (Using XR2066 as the modulated FSK signal) Data Rate: 200 bps - 400 bps. Experiment 2: FSK Demodulator ( II ) (Using LM566 as the modulated FSK signal) Data Rate: 200 bps - 400 bps. Module Eight : PSK Modulation and Demodulation (ACT-1000-28) Chapter 15 PSK Modulator Experiment 1: PSK Modulator Carrier Signal: 100 kHz, Data Rate: 200 bps.   Chapter 16 PSK Demodulator Experiment 1: PSK Demodulator (C) Function Generator, DC Power Supply and RF Generator Module (ACT-1000PG)       Function Generator Features 1. Two signal output ports 2. Frequency range: 10 Hz ~ 100 kHz and 100 Hz ~ 1 MHz 3. Waveforms: Sine, Triangle, Square and TTL Pulse 4. Amplitude: 10 Vpp 5. Built-in 6-digit frequency counter 6. Large 0.5" LED display 7. Overload protection Specification 1. Waveforms: Sine, Triangle, Square and TTL Pulse 2. Amplitude: > 10 Vpp 3. Impedance: 50 ohm +/-10 % 4. Duty control: 30 % ~ 60 % 5. Display: 6-digit LED display 6. Frequency range: 10 Hz ~ 100 kHz (4 ranges) and 100 Hz ~ 1 MHz (4 range) 7. Frequency control: Separative coarse and fine tuning 8. Mode: Internal only 9. Time base: Oscillation frequency 60 Hz 10. Resolution: 0.1 Hz, 1 Hz, 10 Hz, 100 Hz, 1 kHz. DC Power Supply Specification 1. Triple bipolar voltage outputs 2. Constant voltage operation 3. Low ripple and noise 4. Constant voltage output: +/-5 V, +/-12 V 5. Variable voltage output: 0 V ~ +/-15 V RF Generator     Specification   Main Output    Frequency 100kHz ~ 150MHz (up to 450MHz on harmonics)  Range A 100 ~ 290kHz B 290 ~ 900kHz C 0.9 ~ 3.0MHz D 3.0 ~ 11MHz E 10 ~ 35MHz F 32 ~ 150MHz (96 ~ 450MHz, calibrated harmonics)  Accuracy +5%  Level 100mVrms approx up to 35MHz  Level control High/Low switch able and fine control   Amplitude Modulation  Internal Frequency : 1kHz Percentage : 30% max and adjuster  External Frequency : 50Hz to 20kHz Sensitivity : less than 1Vrms   AUX Output Audio Output Frequency : 1kHz Level : 1Vrms MIN, fixed   Frequency Monitor Frequency : Oscillation frequency Level : 50mVrms MIN