Communications Circuits Laboratory
The RN-800 Model Analog and Digital Communications Educational System is a comprehensive set built in several stages of design, test, and prototyping for communications circuits.
Among the advantages of this educational set is the ability to perform experiments in both the Analog and Digital Communications fields, such that 4 modules are dedicated to the Analog Communications Laboratory and 5 modules are dedicated to the Digital Communications Laboratory.
In addition to teaching general communications concepts such as Oscillator, Filter, Modulator, and Demodulator, it fully teaches Amplitude, Frequency, Pulse Width, CVSD Modulations, and Digital Modulations to the user.
To ensure the accuracy of the experiment results, all correct output and input signals, including voltage and current measurements, as well as frequency spectra, are recorded by the digital oscilloscope and spectrum analyzer and are included in the manual accompanying the device.
The user interface is designed to be modular, so that the modules can be easily replaced in the rack or placed on the table without needing a rack.
System Specifications:
- Fixed Power Supply: ±12 V / ±5 Vpm 12 text{ V / } pm 5 text{ V}±12 V / ±5 V
- Variable Power Supply: 0 to ±15 Vtext{0 to } pm 15 text{ V}0 to ±15 V and 0 to ±15 Vtext{0 to } pm 15 text{ V}0 to ±15 V
- 2 Function Generators with Sine, Square, Triangle, and TTL waves with −20 dB-20 text{ dB}−20 dB attenuation.
- RF Oscillators and Active Filters
- AM Modulator and Demodulator
- FM Modulator and Demodulator
- SSB Modulator and Demodulator (DSB-SC)
- ASK Modulator and Demodulator
- FSK Modulator and Demodulator
- PWM Modulator and Demodulator
- CVSD Modulator and Demodulator
- Monostable Encoder and Decoder
- Analog to Digital and Digital to Analog Converter
Experiments Feasible in This Laboratory:
- Colpitts Oscillator
- Hartley Oscillator
- Second-Order Low-Pass and High-Pass Filters
- Investigation of Varactor Diode and Voltage-Controlled Oscillator (VCO) Operation
- Investigation of Phase-Locked Loop (PLL) Operation
- AM Modulation using the MC1496 Modulator
- Investigation of the AM Modulation Frequency Spectrum
- AM Signal Demodulation using a Peak Detector
- AM Signal Demodulation using a Synchronous Detector
- DSB-SC Modulation using the MC1496 Modulator
- SSB Modulation using the MC1496 Modulator
- Investigation of the Frequency Spectrum of SSB and DSB-SC Modulations
- Demodulation of DSB-SC and SSB Signals using a Synchronous Detector
- FM Modulation using the MC1648 Voltage-Controlled Oscillator
- FM Modulation using the XR2209 Voltage-Controlled Oscillator
- FM Demodulation using the LM565 Phase-Locked Loop
- FM Demodulation using the technique of converting the FM Signal to AM
- Analog-to-Digital Converter using the ADC0804 IC
- 8-Channel Analog-to-Digital Converter using the ADC0809 IC
- Digital-to-Analog Converter (Unipolar and Bipolar) using the DAC0800 IC
- PWM Modulation based on the 741 Operational Amplifier
- PWM Modulation based on the 555 Square Wave Oscillator
- PWM Demodulation using the MC1496 Detector
- FSK Modulation using the XR2206 Voltage-Controlled Oscillator
- FSK Demodulation using the LM565 Phase-Locked Loop
- ASK Modulation using the AD633 Multiplier
- ASK Demodulation with the aid of Coherent and Noncoherent Techniques
- nvestigation of Manchester Encoder and Decoder
- CVSD Modulation and Demodulation using the MC34115 IC
- Investigation of the CVSD + Manchester System
