Virtual AM Spectrum Analyzer v5.6.4

A desktop application for visual and interactive simulation and analysis of Amplitude Modulation (AM) spectrums. Created as a project to deepen the understanding of concepts in analog communication systems.

Application Screenshot

Key Features

• Signal Generator: Generates message signals (sine, square, sawtooth, dual-tone) and a carrier signal.
• AM Modulation: Supports DSB-FC (Double Sideband Full Carrier) and DSB-SC (Double Sideband Suppressed Carrier) modes.
• Channel Simulation: Adds noise to the signal with an adjustable Signal-to-Noise Ratio (SNR).
• Demodulation: Simulates Envelope and Coherent demodulators (with phase error control).
• Real-Time Visualization: Interactive plots for signals in the time domain (message, carrier, modulated, demodulated) and frequency domain (FFT spectrum).
• Spectrum Analysis: Zoom, pan, and markers on the FFT plot to analyze frequency components (Fc, LSB, USB).
• Parameter Calculation: Automatically calculates and displays the Modulation Index (m), Bandwidth (BW), Efficiency (η), and Total Harmonic Distortion (THD).
• Educational Presets: Comes with various presets for common modulation scenarios (good modulation, overmodulation, noisy signal, etc.).
• Audio Playback: Listen to the original message signal and the demodulated result to compare sound quality.

Technologies Used

• Language: Python 3
• GUI Framework: Tkinter with a modern theme from ttkbootstrap.
• Signal & Numerical Processing: NumPy and SciPy.
• Data Visualization: Matplotlib.
• Audio Playback: Sounddevice.
• Packaging: PyInstaller to create an .exe file.

How to Use

There are two ways to run this application:

Option 1: Download the Pre-built Version (Recommended)

You don't need to install Python or any libraries.

1. Go to the Releases page of this repository.
2. In the "Assets" section, download the latest .zip file.
3. Extract the zip file.
4. Run the .exe file inside.

Option 2: Run from Source Code (For Developers)

Prerequisites:

• Python 3.8+
• Git

Steps:

1. Clone this repository:

   git clone https://github.com/DhimasArdinata/Virtual-AM-Spectrum-Analyzer.git

2. Go into the project directory:

   cd Virtual-AM-Spectrum-Analyzer

3. (Highly recommended) Create and activate a virtual environment:

   # Windows
   python -m venv venv
   .\venv\Scripts\activate

4. Install all required libraries:

   pip install numpy matplotlib scipy sounddevice ttkbootstrap

5. Run the application:

   # Replace am_analyzer.py with your Python file name
   python am_analyzer.py

Created By

• Name: Dhimas Ardinata Putra Pamungkas
• Student ID: 4.3.22.0.10
• Class: TE-4A

License

This project is licensed under the GNU General Public License v3.0. See the LICENSE file for full details.