ความถี่: 900 MHz Power Output:
1W (1000 มิลลิวัตต์) Data Rate: ขึ้นไป 1 Mbps
พิสัย: ขึ้นไป 100 กม. (depending on
environmental conditions and antenna setup)
อินเตอร์เฟซ: RS232/RS485: Serial communication
ports Ethernet: Optional for some models
The device described is a long-range wireless communication system operating in the 900 MHz UHF band, designed for industrial and remote applications. Here’s a structured breakdown of its features and implications:
ข้อมูลจำเพาะที่สำคัญ & Analysis
- ความถี่ (900 เมกะเฮิรตซ์)
- ข้อดี: Balances penetration through obstacles (buildings, foliage) with reasonable range. Part of the ISM band in many regions, enabling license-free use but prone to interference (เช่น, from microwaves, Wi-Fi).
- ใช้เคส: Suitable for non-line-of-sight (NLoS) environments like urban areas, โรงงาน, or rural settings.
- Power Output (1W / 1000 มิลลิวัตต์)
- ช่วงเทียบกับ. Regulation: Enables extended range but must comply with regional ERP limits. Directional antennas may boost effective range while staying within legal bounds.
- Power Considerations: Higher consumption necessitates robust power supplies or duty cycling for battery-operated setups.
- Data Rate (ขึ้นไป 1 Mbps)
- Practical Throughput: Likely lower in real-world scenarios, especially at maximum range. Suitable for telemetry, sensor data, or SCADA systems, not high-bandwidth tasks.
- การปรับ: May use efficient schemes (เช่น, เอฟเอสเค, Lora) or error correction to maintain rates over distance.
- พิสัย (ขึ้นไป 100 กม.)
- Conditions: Achievable only with ideal line-of-sight (เช่น, elevated antennas, flat terrain) and directional antennas. Earth’s curvature limits ground-based LOS to ~40 km, suggesting use of towers, repeaters, or elevated endpoints.
- Trade-offs: Data rate likely drops significantly at maximum range.
- การเชื่อมต่อ
- RS232/RS485: Integrates with legacy industrial equipment (เซ็นเซอร์, PLCs) over short (RS232) or long (RS485) distances.
- อีเทอร์เน็ต (ไม่จำเป็น): Adds IP connectivity for modern networks, enabling cloud integration or remote management in select models.
แอปพลิเคชั่น
- ระบบอัตโนมัติทางอุตสาหกรรม: Remote monitoring of pipelines, equipment, or utilities.
- Agriculture: Soil/weather sensor networks across large farms.
- การตรวจสอบด้านสิ่งแวดล้อม: Deploying sensors in remote or rugged areas.
- Smart Infrastructure: Managing distributed assets like water tanks or solar farms.
Considerations
- การบรรเทาสัญญาณรบกวน: Spread spectrum or frequency-hopping may combat 900 MHz band congestion.
- Antenna Setup: Directional antennas (Yagi, parabolic) maximize range; omnidirectional antennas suit shorter, flexible deployments.
- Regulatory Compliance: Ensure antenna gain + transmitter power adheres to local ERP regulations.
สรุป
This device is optimized for reliable, low-to-moderate data transmission over long distances, bridging legacy serial systems and modern networks. Its performance hinges on environmental factors and antenna configuration, making it ideal for industrial IoT, การวัดและส่งข้อมูลทางไกล, and remote sensing where wired solutions are impractical.
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