The **FTS-3G-R/B** is a specific variant of a mechanical-electronic hybrid component, most commonly associated with **Optical Bypass Switches** used in fiber optic networking (specifically 3G-SDI or high-speed data applications). The "R/B" suffix typically indicates specific power or logic configurations (often **R**elay/**B**ipolar or specific color-coded status indicators). --- ### 1. Core Technical Specifications These parts are designed to maintain network integrity by providing a "bypass" path if power is lost or a hardware failure occurs. | Feature | Specification (Typical) | | :--- | :--- | | **Fiber Type** | Singlemode or Multimode | | **Data Rate** | Up to 3Gbps (Optimized for 3G-SDI) | | **Switching Time** | < 10ms | | **Insertion Loss** | < 1.0 dB | | **Operating Voltage** | 5V DC or 12V DC (Model dependent) | | **Switch Type** | Latching or Non-Latching | --- ### 2. Key Electronic Components #### A. Electromagnetic Actuator The heart of the FTS-3G is a precision micro-relay mechanism. When energized, the magnetic coil moves a micro-mirror or a fiber prism to redirect the light path. * **The "R" Logic:** Often signifies a specific Reset or Relay coil configuration. * **The "B" Logic:** Often refers to Bi-stable (latching) operation, meaning it stays in its last position even if power is removed. #### B. Control Circuitry (Integrated PCB) The internal PCB manages the voltage levels required to trigger the switch without damaging the delicate mechanical alignment. It includes: * **Flyback Diodes:** To protect the driving circuit from voltage spikes when the coil is de-energized. * **Position Sensors:** Some models include feedback pins to tell the controller whether the switch is in "Bypass" or "Normal" mode. #### C. Optical Bench While not purely "electronic," the optical bench contains the alignment sleeves. The FTS-3G series is specifically engineered for **Low Return Loss**, which is critical for 3G-SDI video signals to prevent ghosting or signal degradation. --- ### 3. Connection Pinout Diagram (General) ```text Pin 1: VCC (Power +) Pin 2: GND (Ground -) Pin 3: Control Signal (High/Low to Switch) Pin 4: Status Output (Bypass Active) Pin 5: Status Output (Normal Active) ``` --- ### 4. Application Use Case The **FTS-3G-R/B** is primarily used in: 1. **Broadcast Television:** Ensuring that a 3G-SDI video feed continues even if a distribution amplifier fails. 2. **Network Security:** In-line "Deep Packet Inspection" tools that must not break the link if they crash. 3. **Data Centers:** Failing over optical links in high-speed fiber rings.