HD Portable COFDM Mobile Video Wireless Transmission System Users Manual

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.

1. Caratteristiche

• Altamente integrato, progettazione modulare
• Adotta la tecnologia di modulazione COFDM, H.264 image coding technology
• Can transmit one 1080P HDMI signal and one unidirectional data up to 230400Kbps
• Bassa latenza, the minimum end-to-end latency is 350ms
• Comunicazione a tutto tondo, non ha paura di costruire muri
• Comunicazione da viaggio a viaggio ad alta velocità,
• Transmitter heat sink type aluminum case, shockproof and impact resistant
• Non-linea di vista (NLOS) trasmissione mobile, 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 chilometri, and the transmission distance of 10W power is not less than 80 chilometri
• La velocità di movimento massima può raggiungere i 600 Km/ora (misurato)
• Synchronous reception of audio and video signals, high-definition HDMI1080P multi-format optional, standard-definition output DVD image quality
• The receiver can realize video recording and backup functions
• 128-bit AES encryption and decryption
• Can provide full customization

2. Applicazione

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: campo radiotelevisivo, sports broadcasting, notizie sociali、diretta aerea、studio, mountaineering expeditions and more. It is suitable for real-time mobile transmission of high-quality images in various complex environments such as urban areas, mari, e montagne.

3: Parameter Indicators

1: Trasmettitore (only standardized pictures, except for customization)

Parametri del prodotto:

Modulazione	COFDM
Tensione operativa	DC11V~DC17V
Corrente di lavoro	1W：≤1.3A DC12V，5W：≤2.5A DC12V，10W：≤5.2A DC12V，
control interface	Standard RS232 interface, 8 bit di dati, 1 fermati un po', addirittura parità, velocità di trasmissione: 19200
transparent data interface	Trasmissione trasparente unidirezionale della porta seriale, 8 bit di dati, 1 fermati un po', supportare la parità dispari, addirittura parità, parità senza fili, velocità di trasmissione: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 、230400
crittografia	Supporta la crittografia a 128 bit
mappatura della modulazione	QPSK（4QAM）、16QAM、64QAM
correzione degli errori in avanti	1/2  2/3  3/4   5/6  7/8
intervallo di guardia	1/32  1/16  1/8  1/4
Numero di vettori	2k
larghezza di banda di frequenza	2/3/4/5/6/7/8M regolabile
flusso di trasporto	2000kbs~20000kbs regolabili
trasmettere potenza	1W/5 W/10 W
frequenza di trasmissione	Any frequency can be customized, the frequency is continuously adjustable, the adjustable range is ±20MHz, and the step is 1MHz
Planarità di potenza	Less than 0.2dB in 10MHz band
Rapporto spalla	The shoulder-to-shoulder ratio is better than -28dB at full power output
second harmonic	≤-45dB
MORE	32dB
video in ingresso	720×480 60IO(NTSC), 720×576 50IO(PAL), 720 50P, 720 60P, 1080 50IO, 1080 60IO, 1080 24P, 1080 25P, 1080 30P, 1080 50P, varie modalità sono adattive.
Interfaccia HD	HDMI
formato di codifica video	H.264
Norma di protezione	Telaio del tipo a radiatore interamente in alluminio, anticorrosione, design antiurto
Overall size	102*80*30mm（1w)/102*90*30mm（5W）/188*47*34mm（10W）/228*55*40mm（20W）
Peso totale	≤0.20KG （1W） /  ≤0.27KG （5W）  ≤1.5KG （10W） ≤2KG （20W）

2: Ricevitore

Parametri del prodotto:

Portable multi-bandwidth HD receiver parameters
Ricevere la gamma di frequenza	170-860VHF MHz&UHF
larghezza di banda di frequenza	2/3/4/5/6/7/8MHz, opzionale
Livello di ingresso RF	-94dBm~-15dBm (con larghezza di banda di 8 M)/-98dBm~-15dBm (at 2M bandwidth)
Impedenza di ingresso RF	50 ohm
Connettore di ingresso RF	N head
Metodo di demodulazione	COFDM
Modo delle costellazioni	QPSK, 16QAM, 64QAM (opzionale)
correzione degli errori in avanti	1/2,2/3,3/4,5/6,7/8 (opzionale)
Numero di vettori	2k，
intervallo di guardia	1/32,1/16,1/8,1/4 (opzionale)
decodifica video	MPEG-2MP@ML/H.264
proporzioni dello schermo	4:3 16:9
Video output image	720*576@8MHz 1080P@60P、50P、50IO、30P、
audio output mode	Stereo unbalanced 300/ 200mv
Uscita audio	2Uscita audio + 2Uscita video
Tensione operativa	AC220V/DC12V ＜0.4A
Operating temperature	-20℃～+50℃
physical dimension	136*115*35mm non-standard all-aluminum shell
peso dell'attrezzatura	0.35Kg

4: Instructions for use

1: Trasmettitore

1. Functional area description

“FORMICA”: 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

“CC 12 V”: DC12V power input port. “+” is the positive pole of the power supply, “-” is the negative pole of the power supply

“DC” È: Spia di alimentazione, 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

2. Parameter Configuration Description

Connect the transmitter parameter adjuster, premere il “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, premere “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, premere il “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

3. General Troubleshooting

UN: The light is off after the power is turned on: Check whether the power input meets the standard

B: “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).

C: The temperature of the transmitter is very low: check whether the current is normal (the deviation can be ±0.2A within the standard current).

D: 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: Ricevitore

1. 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”: Interfaccia di uscita video, the output video format can be adjusted through the “HDMI” menu on the control panel.

“CC 12 V”: Interfaccia di ingresso alimentazione, 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, premere il “USCITA” 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”.

2. LCD parameter description

UN：CH01 UNLOCKED（LCKED）

“CH01” means the channel number of the receiver, “UNLOCKED” means the received signal is unlocked, E “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”

B： FREQ：602.0MHz

“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

C： BW:6.0MHz

“BW” larghezza di banda, 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

D： 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

e： 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:MAPPA: QPSK

“MAPPA: QPSK” is the modulation mapping, this parameter number is set by the transmitter synchronously, and the receiver cannot be modified

g： SNR:0.0dB(SNR:15.0dB)

“SNR: 15.0dB” is the signal quality (questo è, the signal-to-noise ratio, the larger the value, the better). Quando “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

H: 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

3. 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”, e poi premere “MENU/OK” to enter the menu operation; if you need to change the video output format, move the cursor to the “HDMI Mode” menu, premere “MENU/OK” to enter, and select the video to be output After formatting, premere il “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, Larghezza di banda 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, Altrimenti, the receiver will not be able to lock because it cannot find the signal.

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When the search is completed, premere “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, premere il “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

“USCITA”: start and stop recording

4. Video function

 Insert the storage device into the “USB” interface of the receiver, premere il “USCITA” button to start recording, and a blue recording time box will appear on the upper left corner of the video display as shown below

5. 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.

B: Cannot record video: check the U disk or replace the U disk.

C: No signal received: Check whether the channel frequency is consistent with the transmitter.

D: Nessuna uscita video: Check the connection line, spegnere, and restart to check whether there is a boot interface.