COFDM IP wireless data transmitter module
COFDM IP wireless video data transmitter module One-way Ethernet transparent transmission network port Vcan1816
Table of Contents
Introduction
- This ethernet COFDM module supports transmitting the data from the ethernet port to TX RF out.
- Common cofdm transmitters are video signal inputs such as HDMI, CVBS, SDI, or AHD. This one is a transparent transmission module that can support IP cameras and support video and data through cofdm.
- Paired with this COFDM network video data transmitter is a COFDM receiving module, which can realize HDMI and CVBS output, and can also output video to a computer, RTSP, or UDP player through an IP network port RJ45.
- The key role is to use UDP broadcast/multicast to send data.
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COFDM modulation with low latency;
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Stable signal transfer in NLOS and high-speed moving;
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Adjustable working frequency 170-4000Mhz, bandwidth, transmission power, etc;
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Ethernet connection for IP data UDP broadcast transmission
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Maximum 31.67Mbps wireless transmitting bitrates
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Embedded RTSP video client to get video from IP camera via Ethernet connection
- COFDM wireless transmission module + receive the module, forming a one-way wireless transmission network port transmission link
- The transmitting module receives data through the network port and transmits the data received by the network port in the form of COFDM
- After receiving the data, the receiver receives the demodulation and then outputs it through the network port
Unidirectional COFDM network port wireless transmission module function:
Features
- The host computer data is received through the network port, and then the network port data is transmitted.
- Data input: Network port, support protocol UDP broadcast/multicast. Physical interface: RJ45 seat or 4PIN 1.25mm pitch seat
- CFG-UART: COFDM modulation parameter configuration serial port, 4PIN 1.25mm pitch seat, can be docked to our parameter configuration panel. Users can set the center operating frequency point, wireless bandwidth, and other modulation parameters (such as protection interval, convolution bitrate, constellation mode, transmission gain, etc.) through the reference serial port.
- COFDM Transmitter Interface (Tx): MMCX female.
- TF card interface, software upgrade, and maintenance.
- Power input interface (Power): 2PIN 2.0mm pitch Phoenix terminal. Supply voltage: 7V~24V.
- Link LED indicator: The light of the work is emitted, and the data is flashed when the data is transmitted usually.
- Power LED indicator: The power input indicator, the normal power supply is always on.
- Transmitter module size: 73x51mm (excluding the size of interface devices and connectors protruding from the board edge), thickness less than 15mm.
- Supported COFDM modulation parameters:
- Configurable convolutional encoding ratios: 1/2, 2/3, 3/4, 5/6, 7/8
- Configurable constellation: QPSK/QAM16/QAM64
- IFFT mode: 2K
- Configurable protection intervals: 1/4, 1/8, 1/16, 1/32
- Wireless bandwidth: 1 ~ 8MHz MHz adjustable, 1KHz step
- Configurable RF output power: -94dbm ~ -5dbm (different operating frequency points, the maximum transmit power is different).
- Center operating frequency point: between 200MHz ~ and 2300MHz can be configured arbitrarily
Specification
IO
| RF output | MMCX female |
| TTL 3.3V control uart | 4PIN PH1.25mm Connector |
| Power in | 2PIN PH2.54mm phenix Connector |
| Ethernet port | 4PIN PH1.25mm Connector |
| TF-card | For firmware update |
| Power led | Red constant light when the device is normally powered |
| Link led | Green blinks on transmitting |
Modulation
| Modulation Formats | COFDM(DVB-T) |
| Carriers | 2K |
| Bandwidth | Configurable from 1MHz to 8MHz, step by 1KHz |
| FEC | 1/2, 2/3, 3/4, 5/6, 7/8 |
| Guard interval | 1/32, 1/16, 1/8, 1/4 |
| Constellation | QPSK, 16QAM, 64QAM |
RF Transmitted
| Frequency Bands | 70MHz~4GHz |
| Tuning Step size | 1KHz |
| Transmission power | Configurable, maximum -5dBm(subject to frequency) |
Monitoring and control
Comprehensive setup with our Config Panel or other device via control uart.
Temperature range
Full specification: -40° to +70°C Ambient
Storage: –40° to +85°C
Dimensions
73x51x11mm (not including connectors out of the board)
Power requirements
Input range: 7~24VDC
Power consumption: <250mA@12V
I/O Signal
RJ45 ethernet COFDM Transmitter for the IP camera video Transmission
This ethernet IP input COFDM Video transmitter module can receive video from an IP camera via an Ethernet connection with a built-in RTSP client and transmit it. On the COFDM receiving side, our COFDM module has a built-in RTSP Server that allows video streaming over Ethernet for remote software or hardware decoders.
How to use it as the COFDM Relay repeater module?
This module already has a TX transmission function. If you add a dual-antenna receiving module and combine them, you can form a COFDM relay/repeater module. Of course, you need to add a bandpass filter to filter out clutter interference and increase PA to transmit a longer range. If you need customization, please contact us.
Demodulation and Modulation
| Modulation Formats | COFDM(DVB-T) |
| Carriers | 2K |
| Bandwidth | Configurable from 1MHz to 8MHz, step by 1KHz |
| FEC | 1/2, 2/3, 3/4, 5/6, 7/8 |
| Guard interval | 1/32, 1/16, 1/8, 1/4 |
| Constellation | QPSK, 16QAM, 64QAM |
RF Received
| Frequency Bands | 160MHz~860MHz |
| Tuning Step size | 1KHz |
| Sensitivity | -97±1dBm(BW=8MHz, QPSK, CR=2/3, GI=1/16) for one channel and add 3dBm for two-channel |
RF Transmitted
| Frequency Bands | 70MHz~4GHz |
| Tuning Step size | 1KHz |
| Transmission power | Configurable, maximum -5dBm(subject to frequency) |
COFDM wireless transmission system transmission rate calculation
Wireless transmission rate (air interface rate):
Rate(MBps) = (BandWidth(MHz) * 8.0/7.0) / (1+GI) * 1512/2048*log2(constellation point) * code_rate * 188/204.
Take the 8MHz bandwidth as an example of different protection intervals, convolutional bitrates, data rates corresponding to constellations, and the required received signal-to-noise ratio:
UART AT Command
ATDR、ATSD、ATSG、ATSM、ATGD、ATSR、ATGR、ATGB is useful
For the UART AT command operation and format, please check the below link.
Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions COFDM AT Command
Receiver Module
Suggestions
- This is a one-way unidirectional transmission system. if you need a two-way bidirectional transmission system, please check this link. https://ivcan.com/t/two-ways/ or https://ivcan.com/ru/p/mini-cofdm-wireless-ethernet-transmission-module-rj45/
- This is only a data transmission system, if you need video+data transmission, please look details of these modules, https://ivcan.com/p/modulator-demodulator-module-encoder-decoder-hdmi-cvbs/
- If you need a relay (repeater) to support a longer transmission range (distances), please choose stronger PA (Power Amplifier) inside, for example, change 1Watts PA to 2.5 Watts or 5 Watts.
–160MHz~860MHz HD video COFDM receiver module with HDMI/AV/Ethernet/USB output
The COFDM receiver module is a compact digital diversity receiver with integrated H.264 decoding, suitable for use in fluid and high-mobility applications. The receiver module accepts signals from two antennas to significantly enhance the demodulated performance and increase the operating range. The receiver module can find and lock automatically to the incoming transmission quickly according to the pre-set frequency and bandwidth. This receiver module features a range of comprehensive signal outputs including HD at 720p and 1080P, down-converted HD CVBS monitor video, and two analog audios supported.
The receiver module also includes DVR record functionality with a Micro SD card or USB disk. Additionally, the receiver module has a built-in RTSP server that enables video streaming over Ethernet for remote software or hardware decoders. And the receiver module also enables video streaming over USB for remote Android device decoders like smartphones or Android PAD. This allows multiple remote viewers to monitor the same video simultaneously. The receiver module also supports display characters string on the video display screen with the video together in OSD mode.
When paired with the Our COFDM transmitter module, the receiver module offers a comprehensive, rapidly-deployable video and audio solution that enables advanced situational awareness. It can play an essential role in delivering real-time live video from both ground and airborne mobile platforms.
- COFDM demodulation and H.264 video decoder;
- Full HD resolution, 1080P@60fps;
- Great security by AES decryption;
- DVR record with Micro SD card or USB disk;
- Built-in RTSP server enables video streaming over Ethernet;
- Enables video streaming over a USB host for the remote device;
- Supports display characters string on the video display screen in OSD mode;
- Stable signal transfer in NLOS and high-speed moving;
- Adjustable working frequency, and bandwidth.
Specification:
IO
| HD video output | HDMI type A connector |
| Composite video output | 6PIN PH2.0mm connector |
| Audio output | Embedded HDMI and CVBS |
| RF input | Two SMA female 50Ω |
| Power in | 2PIN PH2.54mm connector |
| USB Host | 4PIN PH2.0mm connector |
| TTL UART data | 3PIN PH1.25mm connector, 3.3V signal |
| TTL UART control | 4PIN PH1.25mm connector, 3.3V signal |
| Ethernet | 6PIN PH2.0mm connector |
| TF-Card | TF-Card slot |
| Keys&LEDs | 2*5PIN PH2.0mm connector |
Demodulation
| Demodulation Formats | COFDM(DVB-T) |
| Carriers | 2K |
| Bandwidth | Configurable from 1MHz to 8MHz, step by 1KHz |
| FEC | 1/2, 2/3, 3/4, 5/6, 7/8 |
| Guard interval | 1/32, 1/16, 1/8, 1/4 |
| Constellation | QPSK, 16QAM, 64QAM |
| Bitrates | 0.5Mbps to 31.67Mbps |
RF
| Frequency Bands | 160MHz~860MHz |
| Tuning Step size | 1KHz |
| Sensitivity | -97±1dBm(BW=8MHz, QPSK, CR=2/3, GI=1/16) for one channel and add 3dBm for two channel |
Video and Audio
| Video output | HDMI and CVBS, Ethernet(RTSP protocol by default, option UDP), USB |
| Video formats | 1080P or 720P
720*480 60I(NTSC), 720*576 50I(PAL) |
| Video Decoding | MPEG-4/H.264 AVC |
| Audio output | Embedded HDMI and AV audio |
| Audio Decoding | AAC |
| Decryption | AES256 |
| Storage | USB disk or micro SD card |
Monitoring and control
Comprehensive receiver setup with Our Config Panel or Windows PC or other devices via control UART.
Temperature range
Full specification: 0° to +70°C Ambient
Storage: –40° to +80°C
Physical Characteristics
Board Dimensions: 80.4*50.8mm
Power requirements
Input range: 9~24VDC
Power consumption: <300mA@12V
IO Signals
Keys + LEDs:
The receiver module has a 2*5PIN PH2.0mm connector which provides “keys + LEDs” signals. It is designed for customers who want to expand LEDs and keys to their cases.
PWR led signal: this two-pin can connect to an led for the power indicator, and constant light when the device is normally powered.
The link led signal: this two-pin can connect to an led for a wireless link indicator, which blinks when the video stream is received.
REC led signal: this two-pin can connect to an led for a record indicator, and constant light when video recording.
REC key signal: this two-pin can connect to a button for the switch of video recording, and a short press to change its status. The receiver will automatically check the storage device(micro SD card or USB disk) after powering on and start to record video when the storage device is inserted. Just press it to stop or record again.
OSD key: this two-pin can connect to a button for turning on/off the status of the OSD displaying, long press it to switch(more than 1s). The status will be kept after a reboot. When the OSD status is on without any OSD data input from the data uart, the device will display information on the video screen as:
RF：338.0MHz BW：4.0MHz ; RF, working frequency; BW, bandwidth
QPSK CR：2/3 GI：1/16 ; Constellation, FEC, Guard interval
AIR：3.90Mbps ; AIR, wireless transmitting bitrates
VBR：3.05Mbps AES OFF ; VBR, video bitrates; AES OFF, AES encryption turned off.
SIG1：27 SIG2：22 ; SIG1, the signal intensity of antenna 1; SIG2, the signal intensity of antenna 2
ber1：0.14% ber2：100.00% ; ber1, bit error rate of antenna 1; ber2, bit error rate of antenna 2
REC OFF No Storage ; video recording status
Paired with COFDM transmitter:
The default normal features of the two-antenna Wireless receiver module can be paired with all of Our H.264 transmitter modules. The HD video latency from its inputting of the transmitter to the HDMI screen displaying of the receiver is about 200~250ms.
Our two-antenna COFDM Wireless Receiver module can also be paired with our COFDM transmitter module for the lowest video latency application when manufactured with specified firmware. The specified firmware enables proprietary H.264 video compression/decompression only using p-frames for the lowest latency. The video latency from its inputting of the transmitter to the HDMI screen displaying of the receiver is about 50ms to 130ms.
How to test COFDM IP wireless video data transmitter module?
ethernet modem in one way
FAQs
Please note that this network transparent transmission device is one-way transmission, it can only realize UDP broadcast function, although there is an RJ45 network port, but because it is not two-way transmission, it cannot realize the ping command, so even if you want to connect an IP camera, you need special customization IP cameras, because ordinary IP cameras need two-way transmission equipment.
How to test this network transparent transmission device, please check the below link
How to test COFDM IP wireless video data transmitter module
no, just net transfer via IP ethernet RJ45 input.
- If you want to test the video transfer, maybe you need an encoder board Vcan1746, transfer HDMI / CVBS video to IP stream, then connect the 1816 transmitter.
- Question: I already have Vcan1776, which has a Vcan1746 encoder board at the transmitter module, should I get one more encoder board?
- Answer: Although the encoder board of Vcan1776 can be reused. It needs to disassemble the Vcan1776 RF module, then connect the network port adapter cable, and change the different firmware. It is not recommended to do this. It is recommended that you purchase another separate encoder board.
- The voltage range of TX RX is 7~24V.
- At 12V power supply, use an adapter with a maximum of 1A or more.
- Prepare a formattedFAT32format Micro SD card
fat32-format - Unzip the upgrade file from our verify and send to you, Here is "1816_update_image_xx_yy.zip" file, and copy it to the root directory of the Micro SD card, pay attention to keep the directory structure unchanged (there is a flash folder in the root directory of the Micro SD card, and there is an app folder in it).
one-way ethernet transparent transmission moudle firmware upgrade - Insert the Micro SD card into the Vcan1816 module, power on and wait for the red light on the board to flash, indicating that the upgrade is successful.
COFDM IP wireless video data transmitter module One-way Ethernet transparent transmission network port upgrade firmware - Note:
Under normal circumstances, the update will be completed within 30s after power-on (the red light flashes). If the red light does not flash for a long time after power-on, please check the connection of Micro SD and try power-on again.
Yes, this model support the function you need. Please check the below picture, we have two solutions for you. The same TX module, there are optional RX1 or RX2 for you.
- At the above picture, TX module is only RJ45 ethernet data input, no video input, so there is no any encoder function.
- RX1 is added 2x RF demodulator board on the TX module. So the cost is higher than TX module. (one more top board)
- RX2 has same function, but which no TX transmitting function, it is only bottom decoder board + 2xRF demodulator board. It has RJ45 ethernet data port. So it can total meet your demand. And as the board has mass produce and cost can share and down.
Konstantin –
The COFDM IP wireless video transmitter vcan1816 delivers exceptional performance! Its one-way Ethernet transparency ensures seamless HD video/data transmission with ultra-low latency. Robust signal stability in challenging environments impressed us, while the plug-and-play network port simplified integration. Reliable beyond expectations for industrial/outdoor applications – a game-changer for real-time remote monitoring systems!
John –
This COFDM module provides reliable IP video and data transmission over distances of 10 to 100 kilometers, with latency under 50 milliseconds. Customizable core modules are ideal for oil rigs, disaster relief drones, and battlefield communications.