The **OS-RXL-3** (Oasis RXL-3) is a specialized electronic receiver module commonly used in radio frequency (RF) remote control systems, security devices, and home automation. It is designed to receive signals in the Sub-GHz band, typically at **433.92 MHz**. Below is a detailed breakdown of its electronic components and specifications. --- ### 1. Technical Specifications The OS-RXL-3 is a superheterodyne receiver, which makes it more stable and less prone to interference than older super-regenerative models. | Feature | Specification | | :--- | :--- | | **Operating Frequency** | 433.92 MHz | | **Operating Voltage** | 3.3V to 5.5V DC | | **Operating Current** | ~5mA to 6mA | | **Sensitivity** | -105 dBm to -110 dBm | | **Modulation Type** | ASK (Amplitude Shift Keying) / OOK (On-Off Keying) | | **Output Type** | Digital Data Output (TTL Level) | --- ### 2. Key Internal Components The circuit board consists of several critical stages that process the incoming radio waves: * **RF Front-End:** Includes an antenna matching circuit to capture the 433MHz signal and a Low Noise Amplifier (LNA) to boost weak signals. * **Local Oscillator (Crystal):** Usually features a surface-mounted crystal (SAW resonator or quartz) to ensure frequency stability. * **Mixer & Filter:** Combines the incoming signal with the local oscillator to down-convert it to an Intermediate Frequency (IF), filtering out noise. * **Data Slicer:** An internal comparator that converts the analog wave into a clean digital square wave (1s and 0s) that a microcontroller (like Arduino or PIC) can read. --- ### 3. Pinout Configuration The module typically features a 4-pin or 5-pin layout for easy integration: | Pin Name | Function | Description | | :--- | :--- | :--- | | **VCC** | Power Supply | Connects to 5V (standard) or 3.3V. | | **GND** | Ground | Common ground for the circuit. | | **DATA** | Data Output | Digital signal output sent to the MCU. | | **ANT** | Antenna | Connection point for a 17.3cm wire antenna. | --- ### 4. Implementation Details To use the OS-RXL-3 effectively in an electronic project, consider the following: 1. **Antenna Requirement:** For maximum range (up to 100m in open air), you must solder a solid core wire approximately **17.3 cm** long (quarter-wave for 433MHz) to the ANT pin. 2. **Noise Mitigation:** Because 433MHz is a crowded band, adding a **10µF capacitor** across VCC and GND near the module helps stabilize the power supply and reduce data jitter. 3. **Compatibility:** It is most commonly paired with the **FS1000A** transmitter or similar EV1527/PT2262 based remote controls. ---