The **RTS-123-R** is a high-performance, ultra-compact GPS/GNSS smart antenna module, typically manufactured by companies like Rakon or specialized telecommunications hardware providers. It is designed for precision timing and positioning in industrial and commercial applications. --- ### 1. Key Technical Specifications The following table outlines the core electronic and functional characteristics of the RTS-123-R: | Feature | Specification | | :--- | :--- | | **Receiver Type** | Multi-GNSS (GPS, GLONASS, Galileo, QZSS) | | **Output Protocol** | NMEA 0183 / Proprietary Binary | | **Interface** | UART (TTL Level) | | **Input Voltage** | 3.3V DC (Typical) | | **Internal Antenna** | Integrated high-sensitivity patch antenna | | **Backup Power** | Supports external battery/supercap for Hot Start | | **Timing Accuracy** | 1PPS (Pulse Per Second) within ±30ns | --- ### 2. Core Electronic Components The internal architecture of the "R" variant (often denoting a specific revision or RoHS compliance) consists of several critical subsystems: #### A. The GNSS Engine At the heart of the module is a highly integrated System-on-Chip (SoC). This chip handles: * **RF Front-End:** Filters and amplifies signals from satellites. * **Baseband Processor:** Processes the complex math required to calculate longitude, latitude, and altitude. #### B. Integrated Patch Antenna Unlike standard modules that require an external antenna, the RTS-123-R features a **Ceramic Patch Antenna** mounted directly on the PCB. This is electronically tuned to the 1.575 GHz frequency band. #### C. LNA (Low Noise Amplifier) & SAW Filter To operate in "noisy" environments (near cell towers or WiFi), the module includes: * **SAW Filter:** Blocks out-of-band interference. * **LNA:** Boosts the weak satellite signals before they reach the processor. #### D. TCXO (Temperature Compensated Crystal Oscillator) To maintain a stable frequency even when the temperature fluctuates, the module uses a high-grade TCXO. This is essential for the **Fast Cold Start** capability. --- ### 3. Pinout and Connectivity The module typically uses a multi-pin header or SMT pads for integration. Common pins include: ```text 1. VCC - Main Power Supply (3.0V - 3.6V) 2. GND - Ground 3. TX - UART Data Transmit (NMEA Data) 4. RX - UART Data Receive (Configuration) 5. 1PPS - Pulse Per Second (Timing Signal) 6. V_BACK - Backup Voltage for RTC and SRAM ``` --- ### 4. Typical Applications Due to its integrated nature, the RTS-123-R is used in: * **Telecommunications:** Synchronization of base stations. * **Fleet Management:** Real-time tracking of vehicles. * **IoT Devices:** Low-power location services. * **Drones:** Navigation and return-to-home functions.