The **MP1102-C-RX** is an electronic module primarily associated with **2.4GHz Wireless Audio Transmission systems**. It is commonly found in wireless microphone receivers, audio links, and wireless speaker systems. Below is a detailed breakdown of its technical characteristics and electronic components. --- ### 1. General Overview The "RX" suffix indicates that this specific module is the **Receiver** unit. It works in tandem with a matching Transmitter (TX) module to establish a low-latency digital wireless audio bridge. ### 2. Technical Specifications | Parameter | Value / Range | | :--- | :--- | | **Frequency Band** | 2.400 - 2.4835 GHz (ISM Band) | | **Modulation** | GFSK (Gaussian Frequency Shift Keying) | | **Sampling Rate** | 48 kHz / 16-bit (CD Quality) | | **Latency** | < 12.5 ms (Typical) | | **Supply Voltage** | 3.3V - 5.0V DC | | **Interface** | Digital (I2S) and Analog (Line Out) | --- ### 3. Key Electronic Components The module is a System-on-Module (SoM) that typically integrates the following internal parts: #### A. RF Transceiver Chip The heart of the module is usually a **BK24xx** series or a similar 2.4GHz SoC (System on Chip). This chip handles the frequency hopping (FHSS) to avoid interference from Wi-Fi and Bluetooth signals. #### B. MCU (Microcontroller) An integrated 8-bit or 32-bit MCU manages the pairing logic, power management, and the communication protocol between the transmitter and receiver. #### C. Audio Codec To convert the digital wireless signal back into sound, the module contains a **DAC (Digital-to-Analog Converter)**. This ensures the output can drive a standard line-level input or a small headphone amplifier. #### D. Peripheral Circuits * **Crystal Oscillator:** Usually 12MHz or 16MHz for precise timing and frequency stability. * **Low Drop-Out Regulator (LDO):** Steps down and stabilizes the input voltage to protect sensitive RF components. * **Antenna:** Typically features a PCB trace antenna or an IPEX/U.FL connector for an external dipole antenna. --- ### 4. Pinout and Connectivity The module usually features a header (1.27mm or 2.0mm pitch) with the following pins: 1. **VCC:** Power Input (3.3V-5V). 2. **GND:** Ground. 3. **OUTL / OUTR:** Left and Right Analog Audio outputs. 4. **Pair/Status:** LED output to indicate connection status. 5. **Mute:** Control pin to silence output when signal is lost. --- ### 5. Application Areas * **Wireless Microphones:** Converting wired lapel or handheld mics to wireless. * **Wireless Subwoofers:** Sending audio from a Soundbar to a remote subwoofer. * **Remote Speakers:** Eliminating long cable runs in home theater setups.