Manual de usuario del sistema de transmisión inalámbrica de video móvil COFDM portátil HD
COFDM Mobile Video Wireless Transmission users manual for COFDM-908T and COFDM-912T
Users Manual for COFDM Mobile Video Wireless Transmission
This is a manual for COFDM-912T and COFDM-908T. If the HD input is mentioned in the text, it refers to the COFDM-908T model. If the SD input is mentioned in the text, it refers to the COFDM-912T model. Please Pay attention to the distinction.
Tabla de contenido
1. Caracteristicas
- altamente integrado, diseño modular
- Adopte la tecnología de modulación COFDM, Tecnología de codificación de imágenes H.264
- Can transmit one 1080P HDMI signal and one unidirectional data up to 230400Kbps
- Baja latencia, the minimum end-to-end latency is 350ms
- Todos los aspectos de comunicación, no tiene miedo de la construcción de muros
- High-speed travel-to-travel communication,
- Transmisor caja de aluminio tipo disipador de calor, shockproof and impact resistant
- Sin línea de visión (NLOS) transmisión móvil, the transmission distance of 2W power is not less than 30 kilometers under the condition of no interference, the transmission distance of 5W power is not less than 50 kilómetros, and the transmission distance of 10W power is not less than 80 kilómetros
- La velocidad máxima de movimiento puede alcanzar los 600 km / hora. (Medido)
- Recepción sincrónica de señales de audio y video., multiformato HDMI1080P de alta definición opcional, Calidad de imagen de DVD de salida de definición estándar
- El receptor puede realizar funciones de grabación de video y respaldo
- 128-cifrado y descifrado AES de bits
- Can provide full customization
2. Solicitud
This product is mainly used in technical reconnaissance and evidence collection of public security and safety inspection departments, real-time picture transmission of drones and unmanned ships, radio and television broadcasting, broadcasting live broadcasting: sector de la radiodifusión, retransmisiones deportivas, noticias sociales、aérea vivir、estudio, mountaineering expeditions and more. Es adecuado para la transmisión móvil en tiempo real de imágenes de alta calidad en varios entornos complejos, como áreas urbanas., mares, y montañas.
3: Parameter Indicators
1: Transmisor (only standardized pictures, except for customization)
Product parameters:
| Modulación | COFDM |
| Tensión de funcionamiento | DC11V~DC17V |
| corriente de trabajo | 1W：≤1.3A DC12V，5W：≤2.5A DC12V，10W：≤5.2A DC12V， |
| interfaz de control | Standard RS232 interface, 8 bits de datos, 1 bit de parada, paridad par, velocidad de transmisión: 19200 |
| interfaz de datos transparente | de transmisión del puerto serie transparente unidireccional, 8 bits de datos, 1 bit de parada, apoyar paridad impar, paridad par, paridad inalámbrica, velocidad de transmisión: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 、230400 |
| encriptación | Soporte de cifrado de 128 bits |
| mapeo de modulación | QPSK（4QAM）、16QAM、64QAM |
| corrección de errores | 1/2 2/3 3/4 5/6 7/8 |
| Intervalo de guarda | 1/32 1/16 1/8 1/4 |
| Número de portadores | 2k |
| ancho de banda de frecuencia | 2/3/4/5/6/7/8M ajustable |
| flujo de transporte | 2000kbs ~ 20000kbs ajustable |
| la potencia de transmisión | 1con 5W/10W |
| frecuencia de transmisión | Any frequency can be customized, the frequency is continuously adjustable, the adjustable range is ±20MHz, and the step is 1MHz |
| planitud de energía | Less than 0.2dB in 10MHz band |
| relación de hombro | The shoulder-to-shoulder ratio is better than -28dB at full power output |
| second harmonic | ≤-45dB |
| MORE | 32dB |
| entrada de video | 720×480 60I(NTSC), 720×576 50I(CAMARADA), 720 50PAG, 720 60PAG, 1080 50yo, 1080 60yo, 1080 24PAG, 1080 25PAG, 1080 30PAG, 1080 50PAG, varios modos son adaptables. |
| Interfaz HD | HDMI |
| formato de codificación de video | H.264 |
| norma de protección | All-aluminio tipo de radiador chasis, anti-corrosión, diseño a prueba de golpes |
| Tamaño global | 102*80*30mm（1w)/102*90*30mm（5W）/188*47*34mm（10W）/228*55*40mm（20W） |
| Total Weight | ≤0.20KG （1W） / ≤0.27KG （5W） ≤1.5KG （10W） ≤2KG （20W） |
2: Receptor
Product parameters:
| Portable multi-bandwidth HD receiver parameters | |
| Recibir rango de frecuencia | 170-860VHF MHz&UHF |
| ancho de banda de frecuencia | 2/3/4/5/6/7/8megahercio, Opcional |
| nivel de entrada de RF | -94dBm ~ -15dBm (en el ancho de banda 8M)/-98dBm ~ -15dBm (at 2M bandwidth) |
| impedancia de entrada de RF | 50 ohmios |
| Conector de entrada de RF | N cabeza |
| método de demodulación | COFDM |
| Constellation way | QPSK, 16QAM, 64QAM (Opcional) |
| corrección de errores | 1/2,2/3,3/4,5/6,7/8 (Opcional) |
| Número de portadores | 2k， |
| Intervalo de guarda | 1/32,1/16,1/8,1/4 (Opcional) |
| decodificación de vídeo | MPEG-2MP@ML/H.264 |
| screen aspect ratio | 4:3 16:9 |
| Video output image | 720*576@8MHz 1080P@60P、50PAG、50yo、30PAG、 |
| modo de salida de audio | Stereo unbalanced 300/ 200mv |
| Salida de audio | 2Salida de audio + 2Salida de vídeo |
| Tensión de funcionamiento | AC220V/DC12V ＜0.4A |
| Temperatura de funcionamiento | -20℃ ～ + 50 ℃ |
| physical dimension | 136*115*35mm non-standard all-aluminum shell |
| peso del equipo | 0.35Kg |
4: Instructions for use
1: Transmisor
- Functional area description
“ANT”: Transmitting antenna interface, please connect the antenna before powering on
“HDMI”: High-definition video input interface, input below 1080/50P
“Ctrl”: Transmitter tuner connection interface
“DC 12V”: DC12V power input port. “+” is the positive pole of the power supply, “-” is the negative pole of the power supply
“DC” is: Luz indicadora de poder, when the light is always on, it means that the power input of the transmitting module is normal
“TS”: Video input detection indicator light, this light is always on to indicate video input and normal encoding
- Parameter Configuration Description
Connect the transmitter parameter adjuster, press the “MENU/OK” key to enter the menu, the encryption key and data serial port parameters are displayed first, press the left or right key to move the cursor, and the up and down keys to adjust the parameters
After the parameter setting is completed, press “MENU/OK” to enter the next menu, and the interface is displayed as shown in the figure
Press the left or right key to move the cursor, press the up or down key to adjust the required parameters, the interface prompts as shown in the figure
After all parameter settings are completed, press the “MENU/OK” key to confirm, and the display will be as shown in the figure.
After the setting is completed, the parameters are written successfully, and the display is as shown in the figure
- General Troubleshooting
un: The light is off after the power is turned on: Check whether the power input meets the standard
segundo: “TS” indicator light is off: Check the video input connection cable, check whether the video input format conforms, and check whether the camera is interfered with (you can judge by holding the antenna with your hand).
do: The temperature of the transmitter is very low: check whether the current is normal (the deviation can be ±0.2A within the standard current).
re: Three lights are always on, and one of them is super bright: it means that the transmitter has failed the detection, and you can try to power off and restart (uncommon)
2: Receptor
- Functional area description
“RF in1” “RF in2”: receiving antenna interface, it is recommended to connect the antenna and then turn on the power switch, because the static electricity of the human body may cause the receiver to crash.
“HDMI”: Interfaz de salida de video, the output video format can be adjusted through the “HDMI” menu on the control panel.
“DC 12V”: interfaz de entrada de energía, please strictly follow the power supply voltage requirements, and overvoltage input is strictly prohibited
“ON/OFF”: power switch.
“USB”: video storage interface, when the U disk is inserted, press the “EXIT” button to start the video recording, after the recording is successful, the video display will display the video recording time, and the stored file name is “TS”.
- LCD parameter description
un：CH01 UNLOCKED（LCKED）
“CH01” means the channel number of the receiver, “UNLOCKED” means the received signal is unlocked, and “LCKED” means the signal is locked. “CH00” of the receiver is the initial writing channel, and the default channel corresponding to the normal operation of the transmitter is “CH001”
segundo： FREQ：602.0megahercio
“602.0MHz” is the receiving frequency of the receiver, this frequency must be consistent with the frequency set by the transmitter, otherwise the receiver will not search or receive the signal from the transmitter
do： BW:6.0megahercio
“BW” bandwidth, as shown in the figure, “BW: MHz” is understood as the RF bandwidth is 6MHz, this bandwidth must be consistent with the bandwidth set by the transmitter, otherwise the receiver will search for or cannot receive the signal from the transmitter
re： FEC:1/2
“FEC: 1/2” is the channel error correction, this parameter synchronizes the parameters set by the transmitter, and the receiver cannot be modified
mi： GI:1/32
“GI:1/32” is the channel guard interval, this parameter is set by the transmitter synchronously, and the receiver cannot be modified
F:MAPA: QPSK
“MAP: QPSK” is the modulation mapping, this parameter number is set by the transmitter synchronously, and the receiver cannot be modified
gramo： SNR:0.0dB(SNR:15.0dB)
“SNR: 15.0dB” is the signal quality (es decir, the signal-to-noise ratio, the larger the value, the better). When “0.0dB” is displayed, the signal quality is 0, and the receiver will not be able to lock
“(SNR:15.0dB)” means the receiving signal-to-noise ratio is greater than 15dB. In the “QPSK” modulation mapping state, as long as the signal-to-noise ratio is greater than 6dB, the receiver can lock
marido: PW：-72.1dBm（PW:-72.1)
PW is the received signal strength, (reference level value), the farther the transceiver end is relative to the distance, the weaker the signal strength is, and the larger the displayed value is, when the transmitter is not turned on, if the signal strength of the receiver is greater than -90dBm (such as -79.7dBm), it can be considered as adjacent frequency interference
- Parameter Configuration Description
Power on the receiver, and press the “MENU/OK” button to enter the menu, the first display is the menu of adjustable parameters, if you search for a specified frequency, directly press the “MENU/OK” button to enter the menu; if you want to remove the channel, press Press down to select “ListanbulChannel”, and then press “MENU/OK” to enter the menu operation; if you need to change the video output format, move the cursor to the “HDMI Mode” menu, press “MENU/OK” to enter, and select the video to be output After formatting, press the “MENU/OK” key to confirm.
The frequency search method is as follows. After entering the frequency setting menu, the interface is displayed as shown in the figure. Press the left or right key to move the cursor, press the up or down key to adjust the frequency, ancho de banda de RF, and secret key that match the transmitter, and press the “MENU /OK” key to search. Note that the transmitter must be turned on at this time, de otra manera, the receiver will not be able to lock because it cannot find the signal.
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When the search is completed, press “MENU/OK” to confirm, and the channel is saved in the register of the assistant board, as shown in the figure. To save the channel to the receiver register, press the “MENU/OK” key and the right key at the same time.
After the receiver parameter setting is completed, the functions of the panel keys are as follows
“↑”“↓“: each individually selectable receiver channel “CH**”
“←”“→“: You can choose to view the hidden parameters of the receiver
“EXIT”: start and stop recording
- función de vídeo
Insert the storage device into the “USB” interface of the receiver, press the “EXIT” button to start recording, and a blue recording time box will appear on the upper left corner of the video display as shown below
- General Troubleshooting
un: The value after the receiver displays “-” is very low (Tx is not turned on): It means that the current channel has serious electromagnetic interference, and the normal value is -90- -100.
segundo: Cannot record video: check the U disk or replace the U disk.
do: No signal received: Check whether the channel frequency is consistent with the transmitter.
re: No video output: Check the connection line, apagado, and restart to check whether there is a boot interface.
