20km~150km Video Data Link For Airborne Wireless Duplex Video Data Transmission
Product Attributes
| Attribute |
Value |
| Modulation |
TDD OFDM |
| RF power |
10W |
| Frequency |
806~826MHz,1428~1468MHz,1420~1530MHz |
| Material |
Rugged aluminum alloy housing |
| Color |
Black/Silver |
| Throughput |
Maximum 30Mbps@20MHz |
Key Features
- TDD OFDM full duplex wireless transceiver for long range airborne video data Link
- Up to 30Mbps Iperf Throughput at 20MHz bandwidth channel
- Support point to point, point to multipoint, relay, mesh Networks
- Control through web browser or control uart
- 2 Ethernet and 3 channel uart data link
- Long distance transmission range with 10W RF power
Overview
HCL551 video data link was designed for video data wireless transmission with two way wireless data link. This OFDM radio device works at 800MHz or 1.4GHz bands, with frequency hopping technology (FHSS) to ensure stable signal communication.
Technical Specifications
| Specification |
Detail |
| Model Number |
HCL551 |
| Modulation |
TDD OFDM |
| Frequency |
806~826MHz,1428~1468MHz,1420~1530MHz |
| FHSS |
Support |
| Bandwidths |
1.4/3/5/10/20MHz |
| Throughput |
Maximum 30Mbps@20MHz |
| RF Transmission Power |
10W(40~42 dBm) |
| Constellation |
QPSK,16QAM,64QAM self adaption |
| Sensitivity |
-108dBm(1Mbps) |
| Ethernet ports |
2 * Ethernet ports |
| Serial ports |
3 channels, RS232/TTL/Sbus optional |
| Transmission Range |
30~150km (UAV to Ground, optional distance grade) |
| Management |
Web UI and Control Uart |
| Encryption |
AES128 |
| Networking Mode |
Point to Point, Point to Multipoint, Relay, Mesh |
| Movement Speed |
Support no less than 300km/h |
| Power Input |
24~30V, 28V as default |
| Power Consumption |
<40W (RF Power 10W) |
| Dimensions |
131.9*67.7*28mm |
| Weight |
252g |
Input/Output Ports
| I/O |
Description |
| Ethernet 1 |
4Pin ZH1.5mm connector, bridged with Ethernet2 |
| Ethernet 2 |
RJ45 connector, bridged with Ethernet1 |
| Uart*3 |
3Pin GH1.25mm lockable connector*3, 3 channel uart, RS232/TTL/Sbus optional |
| Power in |
XT30PW-M connector |
| ANT 1 |
Tx/Rx Antenna port, SMA female |
| ANT 2 |
Rx Antenna port, SMA female |
Networking Types
Frequently Asked Questions
Q1. This video data link seems to support IP camera, what if I want to use a camera with HDMI or SDI video output?
A: The default video input is IP RJ45 Ethernet port. For cameras with HDMI, SDI, AHD or AV output, you need our mini encoder device to encode the video and audio signal into digital data for transmission. At the receiver end, you can connect directly to your computer or NVR. For HDMI monitor output, our decoder device converts the digital data back into HDMI video and audio signals.
Q2. Should I choose 800MHz or 1.4G band? Which one is better?
A: If your area has DVB-T or DVB-T2 digital television signal (170-860Mhz), 1.4G would be better. The 1.4G frequency has negligible effect on GPS as the transmitter antenna points down while GPS antenna receives signal upwards.
Q3. Does it support using multiple cameras on the transmitter to only one receiver?
A: Yes, there are two solutions for multiple cameras:
1. 4 IP cameras → Net Hub → Transmitter ↔ Receiver → Computer Screen
2. 4 IP cameras → NVR HDMI output → HDMI encoder IP output → Transmitter ↔ Receiver → computer screen.
Q4. Does the transmitter on the air give failsafe command to the flight controller when connection is lost?
A: The serial port is transparent and doesn't actively send data to the flight controller. You can monitor the link status LED:
- No light: Not connected
- Red light: Weak signal
- Orange light: Medium signal
- Green light: Strong signal
Monitor the RSSI values and control the UAV back when signal weakens.
Q5. Can the air unit and ground unit be interchanged?
A: The air unit (transmitter) is the access node while ground unit (receiver) is the central node. Over 30km, the optimal rate ratio is 4:1 or 3:2 for downlink/uplink.
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