The **HX-R-BNC** refers to a specific style of BNC (Bayonet Neill–Concelman) connector, typically a **Right-Angle (R)**, **Bulkhead (B)** mount, **PCB-mounted** connector. These are fundamental components in radio frequency (RF) circuits, oscilloscopes, and video transmission hardware. --- ## 1. Physical and Structural Components The electronic integrity of the HX-R-BNC depends on its physical construction: | Component | Material | Function | | :--- | :--- | :--- | | **Outer Shell/Body** | Nickel-plated Brass/Zinc | Provides grounding and shielding against EMI. | | **Center Pin** | Gold-plated Brass/Copper | Conducts the high-frequency signal with low resistance. | | **Insulator** | PTFE (Teflon) | Maintains the distance between signal and ground to fix impedance. | | **Right-Angle Leads** | Tin-plated Alloy | Designed for 90-degree soldering onto a PCB. | --- ## 2. Key Electronic Specifications To integrate this part into a circuit, an engineer must consider these electrical parameters: ### A. Characteristic Impedance Most HX-R-BNC connectors are rated at either **50 Ohms** or **75 Ohms**. * **50 $\Omega$:** Used for data and RF (WiFi, Radio). * **75 $\Omega$:** Used for high-definition video (SDI) and cable TV. ### B. Frequency Range Standard versions typically operate from **DC up to 4 GHz**. High-performance versions for HD-SDI video can reach up to **12 GHz**. ### C. Voltage Rating They are usually rated for a working voltage of **500V RMS**, with a dielectric withstanding voltage of up to **1500V RMS**. --- ## 3. PCB Interface (The "R-B" Designation) The "HX-R-BNC" part is designed for specific mounting: 1. **Right-Angle (R):** The connector face is perpendicular to the solder pins. This is ideal for side-panel ports on devices like signal generators. 2. **Bulkhead (B):** Includes a threaded neck and a nut/washer. This allows the connector to be mechanically secured to the device's outer metal chassis, providing a solid ground connection and strain relief. 3. **Through-Hole Pins:** Usually features 2 to 4 ground legs and 1 central signal pin for stable PCB mounting. --- ## 4. Typical Application Circuit In a standard electronic design, the HX-R-BNC is used as the interface for a coaxial cable. ```mermaid graph LR A[Internal PCB Signal] --> B(Impedance Matching Resistor) B --> C{HX-R-BNC Connector} C --> D[Coaxial Cable] C -.-> E[Chassis Ground] ``` ---