Tech IDIntroduction
The DJI Phantom 4 Pro / Pro+ stands at the forefront of consumer and professional drone technology, offering an impressive blend of advanced imaging, robust flight capabilities, and intelligent automation. Designed for aerial photographers, videographers, and tech enthusiasts, this quadcopter elevates the standard for unmanned aerial vehicles (UAVs) with its high-resolution camera, multi-directional obstacle sensing, and extended wireless range.
A critical milestone for any wireless device in the United States is FCC certification. The Phantom 4 Pro / Pro+ carries the FCC ID SS3-WM331A1704, confirming its compliance with stringent RF emission and electromagnetic interference standards. While the grant date is listed as ‘None,’ the registration by FCC.gov authorizes its legal sale and operation in the U.S. market, ensuring users benefit from both safety and performance.
In this expert teardown, we’ll explore the Phantom 4 Pro / Pro+ through several technical lenses: key features and wireless specifications, a deep dive into its operating frequencies and internal architecture, regulatory insights from its FCC filings, and practical use cases. Whether you’re an engineer, drone pilot, or tech aficionado, this analysis will provide a comprehensive look at what makes the Phantom 4 Pro / Pro+ (FCC ID SS3-WM331A1704) a standout in its class.
Key Features & Specifications
The DJI Phantom 4 Pro / Pro+ is engineered for professionals and enthusiasts seeking uncompromising aerial imaging and intelligent flight performance. Its feature set is a direct response to the demands of high-end drone applications, blending hardware innovation with sophisticated software control.
Key Features:
- Enhanced DJI Lightbridge Transmission:
- Supports both 2.4 GHz and 5.8 GHz frequency bands, allowing users to switch channels to minimize interference and maintain stable HD video downlinks—even in crowded RF environments.
- Customizable Remote Controller:
- Features assignable C1 and C2 buttons and intuitive camera controls, giving pilots flexibility for quick access to critical functions.
- Intelligent Obstacle Avoidance:
- Comprehensive obstacle sensing in all directions (front, rear, sides, bottom) enhances safety, especially during Return-to-Home (RTH) operations.
- Advanced Flight Modes:
- Includes TapFly and ActiveTrack, enabling autonomous flight paths and subject tracking for dynamic, creative aerial shots.
- High-Performance Camera System:
- Shoots 4K video at up to 60 frames per second and captures 20-megapixel stills, powered by a 1-inch CMOS Exmor R sensor with mechanical shutter and autofocus for professional-grade results.
- Long-Range, Low-Latency Video:
- HD video downlink with a range of up to 5 km (under optimal conditions), supporting real-time monitoring and flexible mission planning.
- Intelligent Flight Battery:
- Equipped with a 5870 mAh high-capacity battery, providing extended flight times and advanced battery management features.
Technical Specifications:
- Remote Controller: Customizable C1, C2 buttons for user-defined shortcuts
- Sensor: 1-inch CMOS Exmor R, delivering superior dynamic range and low-light performance
- Camera: 4K video recording at up to 60 fps; 20 MP still photos
- HD Video Downlink Range: Up to 5 km (FCC compliant)
- Battery: 5870 mAh DJI Intelligent Flight Battery
- Supported Mobile OS: Android 4.1.2 or later, iOS 8.0 or later
- Obstacle Sensing System: Multi-directional (front, rear, sides, bottom)
- Bluetooth: Present (specifications not detailed in the FCC summary)
Benefits and Practical Impact:
- Interference Mitigation: Dual-band operation ensures robust connectivity even in congested environments.
- Flight Safety: Multi-directional obstacle sensing reduces the risk of collisions and enhances autonomous flight reliability.
- Imaging Excellence: The large CMOS sensor and mechanical shutter enable crisp, motion-free stills and smooth, cinematic video.
- Operational Efficiency: Extended range and intelligent battery management allow for longer, more productive flights.
- User Experience: Customizable controls and intelligent flight modes empower users to focus on creativity and mission objectives, not just piloting.
These features collectively position the Phantom 4 Pro / Pro+ (FCC ID SS3-WM331A1704) as a top-tier tool for demanding aerial imaging and inspection tasks.
Operating Frequencies
The DJI Phantom 4 Pro / Pro+ (FCC ID SS3-WM331A1704) operates across multiple frequency bands, as detailed in its FCC filing:
| Frequency Range (GHz) | Output Power (mW) | FCC Rule Part |
|---|---|---|
| 2.4065–2.4765 | 767 | 15CCC |
| 5.73–5.845 | 392 | 15E38 |
- 2.4 GHz Band:
- Widely used for Wi-Fi and proprietary wireless links, offering a balance of range and penetration.
- 5.8 GHz Band:
- Provides higher data throughput and is less congested, ideal for clear video transmission over shorter distances.
These frequency allocations, combined with their specified output powers, ensure the Phantom 4 Pro / Pro+ delivers stable, long-range wireless control and video downlink capabilities while adhering to FCC Part 15 requirements for unlicensed devices.
Technology Deep Dive
The Phantom 4 Pro / Pro+ leverages a sophisticated wireless architecture, integrating both Wi-Fi and proprietary DJI Lightbridge technologies for command, control, and real-time HD video streaming. Bluetooth support is present (details not elaborated in the FCC summary), likely used for device pairing or auxiliary functions.
Wireless Performance and Implications:
- Dual-Band Flexibility:
- The ability to switch between 2.4 GHz and 5.8 GHz bands enables pilots to avoid interference from other Wi-Fi devices and maximize signal reliability.
- Output Power:
- With up to 767 mW in the 2.4 GHz band and 392 mW at 5.8 GHz, the drone achieves both impressive range (up to 5 km) and robust link stability, even in RF-challenged environments.
- Low Latency HD Downlink:
- Enhanced DJI Lightbridge technology provides a seamless and responsive video feed, essential for precise piloting and framing.
- Interference Management:
- The spectrum flexibility and high output power mitigate common issues like multipath fading and signal dropouts, crucial for professional applications.
Power Consumption and Efficiency:
- The intelligent flight battery (5870 mAh) and efficient RF design ensure that wireless performance does not come at the expense of flight time, balancing power demands with operational longevity.
Test Report Insights:
- While specific test data are not provided in this summary, FCC reports typically validate RF exposure, electromagnetic compatibility, and adherence to strict emission limits—ensuring the Phantom 4 Pro / Pro+ operates safely and efficiently within regulatory guidelines.
In-Depth Internal Component Analysis / Teardown
Main Processor and High-Density PCB
A close examination of the Phantom 4 Pro / Pro+’s primary PCB reveals a meticulously engineered board centered around a custom DJI-branded IC (821P504A). This high-pin-count component likely serves as the main processor or flight controller, integrating critical functions such as sensor fusion, flight management, and proprietary communication protocols. Surrounding this central IC are several smaller chips, indicative of robust power management and signal interfacing. The PCB itself is multi-layered, with dense via stitching and ground pours for optimal EMI suppression and signal integrity. High-quality materials and compact component placement underscore DJI’s commitment to reliability and performance, crucial for real-time flight control and wireless transmission in demanding environments.
Signal Processing and Power Management Section
Another section of the internal electronics showcases a densely populated PCB with a range of surface-mount ICs, capacitors, resistors, and inductors. The presence of medium-sized ICs suggests this area is dedicated to analog/digital signal processing and power management. The ENIG-finished board, with controlled impedance traces and numerous vias, points to advanced PCB design practices aimed at supporting high-speed signals and stable power delivery. The component density and absence of connectors or antennas in this view indicate a core processing or regulation area, essential for the drone’s stable operation and minimal electromagnetic interference.
Power Regulation and EMI-Optimized PCB Segment
This close-up highlights a PCB segment dominated by a prominent 2.2 µH SMD inductor, a hallmark of switching power regulation circuits. The gold-plated traces, dark soldermask, and high-density routing denote a premium, multi-layer board built for both reliability and EMI control. Multiple MLCCs and passive components provide decoupling and signal conditioning, while dense via placement ensures robust grounding. The absence of major ICs and connectors suggests this board segment focuses on power delivery and filtering, supporting the drone’s sensitive electronics with clean, stable voltage.
Sensor Interface and Modular Connectivity Board
A further internal image reveals a black PCB populated with medium-sized ICs, numerous passives, and a prominent FPC/FFC connector. The layout, characterized by tight routing and multiple ground vias, suggests this section is dedicated to sensor interfacing or power management rather than core processing. The inclusion of modular connectors and test points supports easy assembly, testing, and repair—an important consideration for high-end drones. The overall design reflects DJI’s attention to signal integrity and modularity, facilitating integration with the drone’s camera or sensor subsystems.
Motor Control and Power Distribution Assembly
The final internal image focuses on a PCB featuring two main ICs labeled ‘P00251.17 SL 5333’, likely custom motor driver or power management chips. Surrounding these are large resistors, capacitors, and numerous white wires—indicative of a power distribution or ESC (Electronic Speed Controller) module. The symmetrical component layout and robust ground pours point to multi-phase circuitry, essential for precise motor control and flight stability. The modular harnesses enable straightforward replacement or upgrade, underscoring DJI’s emphasis on maintainability and high-performance actuation in the Phantom 4 Pro / Pro+.
Regulatory Insights & FCC Filing
The FCC ID SS3-WM331A1704 assigned to the DJI Phantom 4 Pro / Pro+ certifies that this drone adheres to U.S. electromagnetic interference and RF emission standards under FCC Part 15. This certification, registered by FCC.gov (grant date: None), is essential for legal sale and operation within the United States, confirming that the device has passed rigorous compliance testing.
FCC filings typically include:
– RF exposure and electromagnetic compatibility (EMC) test reports
– Internal and external photos
– User manuals and setup guides
– Block diagrams and schematics
Key insights from official documentation:
– The User Manual (Part 1) outlines comprehensive setup, operation, and safety procedures, emphasizing the drone’s advanced camera, intelligent flight modes, and robust battery management.
– User Manual (Part 2) details intelligent flight features, obstacle sensing, battery care, and remote controller operation, providing technical depth for advanced users.
– User Manual (Part 3) covers aircraft specifications, remote controller functions, gimbal and camera operation, and the DJI GO app, ensuring users maximize the drone’s capabilities within regulatory and safety guidelines.
These documents, available through the FCC database, collectively affirm that the Phantom 4 Pro / Pro+ (FCC ID SS3-WM331A1704) is engineered for both performance and compliance.
Potential Use Cases & Target Audience
With its suite of advanced features and professional-grade imaging, the DJI Phantom 4 Pro / Pro+ (FCC ID SS3-WM331A1704) serves a diverse range of users and scenarios:
- Aerial Photography & Cinematography:
Content creators and filmmakers leverage the 4K/60fps video and 20MP stills, coupled with intelligent flight modes and obstacle sensing, to capture dynamic, high-quality footage in complex environments. - Surveying, Mapping & Inspection:
Industrial users and surveyors benefit from the drone’s long-range, low-latency HD downlink, robust obstacle avoidance, and stable multi-band transmission for reliable data collection over large or challenging sites. - Enthusiast and Prosumer Pilots:
Tech enthusiasts seeking the latest in UAV technology appreciate the customizable controls, intelligent automation, and advanced safety features, all supported by a battery system designed for extended flight sessions.
The ability to switch between 2.4 GHz and 5.8 GHz frequencies greatly reduces interference, ensuring a stable HD video link—crucial for professional and creative missions alike.
Conclusion
The DJI Phantom 4 Pro / Pro+, under FCC ID SS3-WM331A1704, exemplifies the intersection of high-performance engineering and regulatory compliance. Its advanced wireless architecture, professional imaging capabilities, and intelligent flight features set a benchmark in the UAV market. The meticulous internal design and FCC certification underscore DJI’s commitment to reliability, safety, and innovation. For aerial imaging professionals and demanding hobbyists, the Phantom 4 Pro / Pro+ remains a top choice—delivering exceptional results while meeting the highest standards for RF emissions and operational integrity.
