UHF/ L bands Network 150km UAV Video Transmitter With Frequency
Hopping Spread Spectrum
Key Features
- TDD OFDM wireless video transmitter receiver for UAV video data
link
- Maximum 30Mbps Iperf Throughput at 20MHz bandwidth
- Support point to point and point to multipoint networking
- Long transmission distance up to 150km with 10W RF power
- With frequency hopping spread spectrum technology
- Uplink and downlink stream control
- Provide military-grade OEM/ODM video transmission solution
Overview
HCL551 UAV video transmitter was designed for long range video data
wireless transmission with bidirectional wireless data link. It
works at 800MHz or 1.4GHz bands, with frequency hopping spread
spectrum technology (FHSS) to ensure stable signal communication.
Technical Specifications
| Model Number | HCL551 |
| Product name | UHF/ L bands Network 150km UAV Video Transmitter With Frequency
Hopping Spread Spectrum |
| 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 |
Multiple Networking Types
Point to Point networking
Point to Multipoint networking
Relay network
Mesh networking
Frequently Asked Questions
Q1. This UAV video transmitter seems to support IP camera, what if
I want to use a camera with HDMI or SDI video output?
Yes, the default video input is IP RJ45 Ethernet port. If your
camera only has HDMI, SDI, AHD or AV output, you need to buy our
mini encoder device to encode the video and audio signal into
digital data for transmission. At the receiver end, you can connect
it directly to your computer or NVR. If you want to output to an
HDMI monitor, you can also buy our decoder device to convert the
digital data back into HDMI video and audio signals.
Q2. Should I choose 800MHz or 1.4G band? Which one is better?
If your area has a DVB-T or DVB-T2 digital television signal, the
TV frequency range is 170-860Mhz, so choose 1.4G would be better.
Moreover, GPS antenna receives the GPS signal and the GPS direction
on the drone is up, and our transmitter antenna is pointing down to
send the signal to the ground. So the 1.4G frequency effect on GPS
is negligible.
Q3. Does the UAV video transmitter support using multiple cameras
on the transmitter to only one receiver? For example, use 3 IP
cameras on the transmitter.
Yes, it supports. There are two solutions for the multiple cameras
on transmitter to one receiver:
- 4 IP cameras → Net Hub → Transmitter ↔ Receiver → Computer Screen
- 4 IP cameras → NVR HDMI output → HDMI encoder IP output →
Transmitter ↔ Receiver → computer screen.
Q4. Does the UAV video transmitter on the air give failsafe command
to the flight controller when the connection between air and ground
will be lost?
The serial port of our wireless video transmission link is
transparent, no data is actively sent to the flight controller.
This is controlled by the ground station. It won't send failsafe
command, but you can see the link working status led from the
signal indicator as below:
| Link LED | Wireless link status |
|---|
| No light | This node is not connected with the wireless network |
| Red light | The wireless link signal is weak |
| Orange light | The wireless link signal is in middle |
| Green light | The wireless link signal is strong |
Flight controller doesn't get the information, but you can see the
link status LED light. If it is Orange or Red, you should control
the UAV back in advance. You can also get the RSSI values from
below window.
Q5. Can the air unit and ground unit be interchanged for use with
change in the setting?
The difference between the air unit (transmitter) and ground unit
(receiver) is:
- Device type: Air unit (transmitter) is the access node and the
ground unit (receiver) is the central node.
- Rate ratio of the downlink and up link. Over 30km, the best rate
ratio is 4:1 or 3:2.
Q6. Does it support 4K video?
Yes, it supports 4K video, but the transmission range would be
shorter than that of 1080P.
Q7. What are the difference between model HCL536 and HCL551?
The main difference is in the power. HCL551 supports a transmission
distance up to 150 km, while HCL536 only supports a transmission
distance up to 100 km.
