### Overview of PE9935-72-R The **PE9935-72-R** is a high-performance, precision RF (Radio Frequency) cable assembly manufactured by **Pasternack**. This specific part is designed for high-frequency signal transmission, typically used in test and measurement, telecommunications, and aerospace applications. --- ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Connector A** | SMA Male (Straight) | | **Connector B** | SMA Male (Straight) | | **Cable Type** | PE-P142LL (Low Loss) | | **Impedance** | 50 Ohms | | **Max Frequency** | 18 GHz | | **Length** | 72 Inches (approx. 182.88 cm) | | **Propagation Velocity** | 80% to 83% (typical) | | **Shielding** | Triple Shielded | --- ### Component Breakdown #### 1. Connectors (SMA Male) The assembly uses **SubMiniature version A (SMA)** connectors. These are threaded RF connectors that provide a secure mechanical connection and excellent electrical performance up to 18 GHz. They are typically constructed from stainless steel or gold-plated brass for durability. #### 2. The Cable (PE-P142LL) The "LL" in the cable type stands for **Low Loss**. This cable is engineered to minimize signal attenuation (power loss) over the 72-inch span. * **Dielectric:** Usually expanded PTFE (Polytetrafluoroethylene) for low capacitance. * **Shielding:** Triple shielding provides high EMI (Electromagnetic Interference) protection, ensuring signal integrity in noisy environments. #### 3. RoHS Compliance The **"-R"** suffix in the part number indicates that the component is **RoHS Compliant**, meaning it is manufactured without hazardous substances like lead, mercury, or cadmium. --- ### Key Applications * **Test Bench Interconnects:** Used to connect signal generators to oscilloscopes or spectrum analyzers. * **System Prototyping:** Ideal for RF breadboarding where high-frequency signals must be routed between modules. * **Data Communications:** Used in infrastructure for 5G, LTE, and satellite communications testing. --- ### Performance Considerations When using the PE9935-72-R, it is important to observe the **Minimum Bend Radius**. Over-bending the cable can damage the internal shielding or dielectric, leading to "kinks" in the VSWR (Voltage Standing Wave Ratio) and increased signal loss.