The **FVS-4B-R** is a specialized high-performance video splitter (specifically part of the **SmartAVI** product line) designed for professional-grade VGA signal distribution. Below is a breakdown of its electronic components, technical specifications, and internal logic. --- ### 1. Core Component Breakdown The device is built to handle high-bandwidth analog signals while maintaining signal integrity across multiple outputs. | Component Category | Description | | :--- | :--- | | **Input Interface** | 1x HD15 (VGA) Female connector with signal sensing. | | **Output Interface** | 4x HD15 (VGA) Female connectors for multi-display distribution. | | **Signal Amplification** | Active operational amplifiers (Op-Amps) to prevent signal loss/ghosting. | | **Bandwidth Management** | Integrated circuits (ICs) supporting up to 400 MHz bandwidth. | | **Power Regulation** | DC power input (usually 5V-9V) regulated internally to stabilize the video signal. | --- ### 2. Key Electronic Specifications The electronics are engineered to support "Daisy Chaining," meaning the circuitry is designed to allow multiple units to be linked without significant degradation. * **Bandwidth:** 400 MHz (Supports high resolutions like 1920x1200 or 2048x1536). * **Signal Type:** VGA, SVGA, XVGA, Multi-Sync. * **Impedance:** 75 Ohms (standard video impedance). * **Transmission Distance:** Capable of driving signals up to 200 feet (approx. 60 meters) depending on cable quality. --- ### 3. Internal Logic & Circuitry The FVS-4B-R is an **Active Splitter**, which distinguishes it from a simple "Y-cable." 1. **Buffer Circuitry:** The input signal is isolated by a buffer. This prevents a malfunction on one monitor from affecting the source or other connected monitors. 2. **Signal Boosting:** Because VGA is an analog signal, splitting it causes a drop in voltage (brightness). The FVS-4B-R uses an internal amplifier circuit to restore the voltage to 0.7V peak-to-peak. 3. **DDC Support:** The first port usually includes DDC (Display Data Channel) pass-through, allowing the computer to "read" the EDID (Extended Display Identification Data) of the monitor to auto-configure resolution. --- ### 4. Technical Summary Table | Feature | Specification | | :--- | :--- | | **Video Type** | RGBHV, RGBS, RGsB | | **Resolution** | Up to 1920 x 1440 @ 60Hz | | **I/O Impedance** | RGB: 75 Ohms | | **Power Supply** | External (PS5VDC1A usually) | | **Enclosure** | Shielded Metal (for EMI/RFI reduction) |