Active four channel video-receiver for twisted pair TWIST-4RC - High quality VIDEO TRANSMISSION Start Price USD 190.00 Current Price USD 190.00 Time Left 11 days 12 hours 48 minutes Bid Count 0 Buy It Now Price - Reserve Price - Start Time Wednesday, October 22, 2008 End Time Tuesday, January 20, 2009 Location Riga, Vidzeme See more about 'Active four channel video-receiver for twisted pair' Description   “TWIST-4RC”Active four channel video-receiver  for,transmission of video signals over twisted pair  wires Four video channels Transmission of high resolution video signal over twisted pair wires for distances up to 900 meters Transmission of high resolution video signal over twisted pair wires for distances up to 1800 meters Adjustment for disdance compensation by one switcher with discretion of 100 meters Indication of video signal presence Built-in block of power supply with electronic protection Active four channel video-receiver includes: Four separate receivers converting differential video signals, which are sent from different video signals transmitters by twisted pair of wires, into standard video signal. It is placed on receiving end of video lines. During serial switching on of transmitters “TWIST-T” (or “TWIST-2T”) at transmitting ends of video lines and switching on of receiver “TWIST-4RС” on receiving end of four video lines there are *This item includes only "Twist 4RC" Every of four channels of receiver “TWIST-4RC” has differential input for twisted pairs made in the form of contact connector with 3 contacts. Two contacts are intended for connection twisted pair of wires with different phases, and third contact is for net ground wire. Coaxial 75 ohm BNC output connector is intended for output of standard video signal. Every of four channels of receiver has amplifier – corrector, which provides compensation of signal losses in cable and corrects signal roll off at high frequencies (discrete correction of signal frequency characteristic depending on video line’s length with accuracy till 100 meters). Receiver has protection of inputs from impulse pickups with amplitude till 120 V and pulse width till 100 ms and protection from constant differential voltage till 24 V or voltage on linear wire with relation to common wire till ± 12 V. Device has built in power-unit for ac power supply 220 V. Device is intended for work indoors, is made wholly on integrated circuits of JSC “RD ALFA md”. It is notable for small power consumption, reliability, simplicity of operation.   Technical characteristics    “TWIST-4RC” Parameter Units Value 1 Number of receivers 4 2 Voltage  of input video signal Vpp 0,7-3,0 3 Coaxial output impedance Ohm 75 4 Input impedance  twisted pair  wires Ohm 100 5 Frequency  bandwidth  Hz-MHz 20 - 7 6 Video gain input – output (adjustable) 0.5-2.0 7 Range of equalization of amplitude – frequency characteristic at frequency 5 МHz dB 0 –24 9 Increment of equalization of amplitude – frequency characteristic at frequency 5 МHz Number 10 9 Common mode rejection dB 40 10 Supply current of receiver mA 170 11 Supply voltage (AV 50 Hz) V 220-230 12 Dimensions of receiver Weight of receiver mm g 240x150x45 420 13 Recommended  transmission distance m 900* or 1800 ** * Losses in twisted pair at frequency 4 MHz not more than 4.1 dB on 100 m ** On using transmitters “TWIST-2” Maximum allowed voltages in video line Units Value 1 Differential voltage on signal wires, not more than Vpp 24 2 Voltage on signal wire with relation to common wire Vpp ± 12 3 Amplitude of impulse voltage with width not more than 100 ms Vpp 120                                                      Advantages of our products: Noise & Cross – Talk Immunity High quality transmission of symmetric video signal overy twisted pair  wires at long distances – from 200 to 2000 meters. Exceptional noise cancellation and cross talk immunity. Video quality is assured even when signals are used in electrical “noisy” environment. Easy Installation, Simple Adjustment All devices have the unique switcher for compensation of line’s length and one variable resistor for gain control. Sync tip clamp option All devices have special circuit design for sync tip clamp option for video signals. Special power supply unit All devices have special power unit, which provides the big dynamic range of video signals. The built in power unit is with electronic protection. Protection from Dangerous Voltage There is protection of valuable video equipment by suppressing external dangerous voltage. Virtually all products offer line-to-line (Differential) and line-to-ground (Common) protection from dangerous voltage. (See table of absolute maximal operating voltage). Compact Packaging Devices are enclosed inside the case with dust and moisture protection. Please not that our devises works only with 220V if you need to operate with device using 110V, please use convertor or before bidding consult us, if it is possible to change power supply for you. If you need more information about over products and over company, please download our catalogue (in pdf format) This document (doc format) will help you to choose correct deviceIf you have any question you are to consult me, by eBay message, email or phone if you have any question. BIPOLAR Ltd. Riga, Latvia, Maskavas-240 tel/ +371 29478837 ( E-mail: levs.lapkis@rdalfa.lv ) All rights reserved. Place a Bid!