The **AB-AV108-R** is a high-performance **8-Port Composite Video & Stereo Audio Distribution Amplifier**. It is primarily used in professional AV environments to split a single input signal into multiple identical outputs without loss of signal quality or strength. --- ## 1. Core Specifications The device is built using active circuitry to ensure that the signal impedance remains stable across all ports. | Feature | Specification | | :--- | :--- | | **Input Ports** | 1 x RCA (Yellow, White, Red) | | **Output Ports** | 8 x RCA (Yellow, White, Red) | | **Video Bandwidth** | 50Hz - 5.5MHz | | **Audio Frequency** | 10Hz - 20KHz, 0dB | | **Video Input Level** | 0.8 - 1.0 Vp-p / 75Ω | | **Audio Input Level** | 2V (RMS) / 47KΩ | | **Housing** | Metal Chassis (for EMI shielding) | --- ## 2. Key Electronic Components & Design The internal electronics are designed to handle signal amplification and isolation. ### A. Active Amplification Circuitry Unlike passive splitters (which degrade signal strength), the AB-AV108-R uses **operational amplifiers (Op-Amps)**. * **Unity Gain:** It ensures the output voltage matches the input voltage exactly. * **Signal Boosting:** It compensates for the resistance introduced by splitting the signal eight ways. ### B. Impedance Matching For video signals to remain clear and ghost-free, the device maintains a **75-ohm impedance** on all video paths. If the impedance were mismatched, you would see "ringing" or reflections in the video image. ### C. Isolation & Crosstalk Prevention The electronic layout is designed to prevent "crosstalk" (where the signal from one channel leaks into another). * **Individual Buffering:** Each of the 8 outputs is typically buffered individually. If one output cable shorts out, it will not affect the signal on the other 7 ports. ### D. Power Regulation The unit typically operates on a **9V - 12V DC** external power supply. Internally, it contains: * **Voltage Regulators:** To ensure stable voltage to the ICs. * **Filter Capacitors:** To remove "hum" or 60Hz noise from the power line that could manifest as rolling bars on the video. --- ## 3. Physical Interface Layout The back panel is organized for high-density connectivity: 1. **Input Block:** One set of 3-RCA jacks (Video, Left Audio, Right Audio). 2. **Output Array:** Eight sets of 3-RCA jacks arranged in rows. 3. **Power Jack:** DC barrel connector. 4. **LED Indicator:** Power status light on the front panel. ---