TDD-FDD uplink and downlink frequency asymmetric transmission vcan2002
Feature
- Support asymmetric transmission of uplink and downlink frequencies
- Support noise floor detection and automatic frequency selection
- Supports AES256 encryption
- Support long-distance large-bandwidth transmission
Parameter
| System parameters | Technical indicators |
| Device model | VCAN2002 |
| Working frequency | f2 MHz (uplink), f1 MHz (downlink) (for example uplink 1.4G, downlink 17.G
other frequency bands can be customized) |
| RF channel | 2T2R |
| Transmit power | 40dBm (10W) |
| Transmission distance | 150KM (air-to-ground visual range) |
| Channel bandwidth | 10MHz |
| Modulation | QPSK、16QAM |
| maximum rate | 16Mbps@16QAM3/4 |
| Communication encryption | AES256 |
| Transmission delay | ≤10ms |
| RF interface | SMA x2 |
| Power interface | XT30PW-M |
| Device interface | Ethernet*2, TTL/RS232*2, RS422*1, SBUS/TTL*1 |
| Machine power consumption | Air unit ≤66W; Ground unit ≤15W. |
| Product Size | 180mm*81mm*29mm |
| product weight | 415g |
| Operating Voltage | DC 22~30V, typical value: 28V@3A |
| Operating temperature | -40~+65℃ |
The channel can provide a capacity of 4Mbps, and the pod can set to 2Mbps
150km test video
FAQ
Q: Can the uplink and downlink working frequencies be configured by the user?
A: For standard models, the working frequencies are factory preset and cannot be modified by the user.
- Uplink (f2): 1.4 GHz
- Downlink (f1): 17 GHz
If your application requires user-adjustable frequencies, we recommend using the FDD transceiver module.
- TX (uplink): User configurable from 170 MHz to 6000 MHz
- RX (downlink): User configurable from 170 MHz to 860 MHz
- For RX frequencies over 860 MHz, an additional down-conversion stage is required.
Please select the appropriate model based on whether fixed or user-configurable frequency operation is needed.
Q: What are the advantages of the FDD + TDD hybrid technology in this video & data transmission system?
A: This system combines the best features of FDD (Frequency Division Duplex) and TDD (Time Division Duplex) to deliver superior performance for professional drone operations.
- Real-time two-way communication with ultra-low latency (FDD advantage): Separate frequencies are used for downlink (video & data to ground) and uplink (control commands from ground). This enables true simultaneous transmission, so you get smooth live video and instant control response without any waiting or switching delays.
- High spectrum efficiency and flexible bandwidth allocation (TDD advantage): The system dynamically adjusts bandwidth between video and control/data as needed. This allows higher overall data rates and makes the best use of available radio spectrum.
- Excellent anti-interference capability and reliability: With real-time interference detection, automatic frequency selection, adaptive bitrate, automatic retransmission, and smart power control, the link remains stable even in complex environments with multipath interference or crowded radio frequencies.
- Long range and high-quality transmission: Supports up to 200 km air-to-ground range and up to 16 Mbps bandwidth, allowing you to transmit clear HD video while simultaneously sending telemetry and control data in both directions.
In simple terms: Pure FDD offers excellent low-latency two-way performance but can be less spectrum-efficient. Pure TDD is very efficient and flexible but may introduce slight delays. The FDD + TDD hybrid gives you the perfect balance: low latency + high efficiency + strong anti-interference performance, making it ideal for demanding drone applications such as power line inspection, emergency response, aerial surveying, and long-range surveillance.



iVcan.com –
I have been using the VCAN2002 for several weeks, and it has exceeded my expectations in every aspect. The asymmetric TDD-FDD uplink and downlink transmission works flawlessly, providing stable high-speed data even over long distances. The automatic frequency selection and noise floor detection make setup simple and reliable in complex environments. AES256 encryption ensures secure communication, while the low latency of less than 10ms is ideal for real-time control. The unit is robust, energy-efficient, and performs exceptionally well under extreme temperatures. Highly recommended for professional UAV and long-range wireless applications.