Single Channel Active Power-Video-Data Transmitter And Receiver (VB303T&R)
Single Channel Active Power-Video-Data Transmitter and Receiver VB303T&RDescription:VB303T transmits video signal to VB303R,Website:, at the same time, VB303R provides DC 36V power supply for VB303T, then VB303T converts the received DC 36V power supply into DC 12V to provide stable DC 12V power supply for camera or other headend equipments with maximum loading capacity of DC 12V (500mA) and also provide a channel of RS485 control interface, so it can complete the transmission of video, power supply and control signals on this line only to lay a Cat-5 unshielded twisted pair wire, which can greatly simply the wiring project and save wire use quantity (VB303T only can be used with VB303R)Features:1. Adopt differential signal transmission with excellent anti-jamming ability2. Save project cable expenses, it can complete the transmission of video, power supply and control signals on this line only with one Cat-5 unshielded twisted pair wire3. It can provide stable DC 12V power supply for the headend camera or other electro-equipments only to provide a DC 36V power supply at the receiving terminal (master control room) in the whole transmission system without providing another power supply for the camera and other DC 12V electro-equipments and realize remote power supply. 4. Built-in transient suppression protection5. The farthest transmission distance can reach 1500m when VB303R is used with VB303T (this series shall be in matched use and shall not be used with other types of transmitter)The transmission distance has relation with the total power of the camera and other headend equipments, for the details, please refer to the following table: Loading current (DC12V)Farthest transmission distanceRemarks100mA or below1500mThese data are the measured distances with standard Cat-5e twisted pair wire. The transmission distance will be directly affected if the used wires are in poor quality.200mA1200m300mA800m400mA600m500mA400mTechnical specifications:Video FormatNTSC, PAL , and SECAM Frequency ResponseDC to 8MHzAttenuation0.5dB typCMRR60 dB ImpedanceCoax, Male BNC75 ohms RJ45/Terminal Block100 ohmsWorking environmentWorking Temperature -10℃ to +70℃ Storage Temperature -30℃ to +70℃Humidity 0 to 95%Wire TypeUTP5ConnectorFemale BNC, RJ45 and Terminal BlockPower36VDCCaseAluminum alloy caseDimension105mm*70mm*29mmType of the required wire:Unshielded Cat-5 or above twisted pair wire (Please use standard Cat-5 or above twisted pair wire. The wire quality will directly affect the transmitted image effect and transmission distance.)Characteristic impedance:100Ω±20ΩDC loop resistance: 18Ω/100mDifferential capacitance: 62pf/m (maximum)Connection method:Connect the two-color wires of a pair of Cat-5 unshielded twisted pair wire to the '+’ terminal of the green socket and connect the single-color wires to the '-’ terminal of the green socket. Connect the BNC interface of the transmitter to the BNC interface of the camera. If there is any joint in the circuit, please adopt welding method or special junction box to ensure perfect contact at the joint. Please be sure to connect the interface marked with '’ symbol to the ground wire of the lighting-proof system with the copper conductor with sectional area≥1.5 mm2!The clamping order of the modular plug is shown as follows (TIA/EIA-568B):Adjusting method:Adjust "BRIGHTNESS" knob to adjust the image brightness, then adjust "SHARPNESS" dial switch to compensate the image sharpness and color. The compensation size in turn is 1 as minimum and 4 as maximum. Pressing dial switch shows the compensation of this position is turned on. Next or multiple switches can be pressed according to the requirements. The four dial switches can compose 16 compensation values (as shown in the following figure) to meet the requirements of different transmission distancesFrequently Asked QuestionsWhy does my video look like a scrambled Cable TV signal?This typically indicates reversed polarity. Can shielded twisted pair be used?Some customers have successfully used shielded wire up to a few hundred feet. However we does not recommend it. Its high-frequency roll-off will severely degrade the distance performance. Can Category 6 wire be used?Yes. Unshielded Twisted Pair wire, Category 5 or better, can be used with UTP video transceiver.Can I transmit more than one video signal in a multi-pair wire bundle?Yes. One of the benefits of using UTP video transceivers is interference rejection. UTP video signals can reside in the same wire bundle as multiple video signals, ringing teles, Ethernet, low voltage power, RS-422, RS-485, etc.Application Diagram
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