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> Twist-2T, twisted pair video transmission system
Twist-2T, twisted pair video transmission system
Devices for transmission of video signals
over twisted pair wires for distances up to 1800 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<
* Built-in block of power supply with electronic protectionCase with protection from dust and moisture
System TWIST-2T includes the following devices:
* Transmitter TWIST-2T , which converts signal from the source (video camera) into differential video signal. It is placed on transmitting end of video line.
* Receiver TWIST-R , which converts differential video signal into standard. It is placed on receiving end of video line.
When transmitter TWIST-2T on transmitting end of video line and receiver TWIST-R on receiving end of video line are serially switched on black-white or color video signal is transmitted by twisted pair wires for distance at distance till 1800 meters.
* Transmitter TWIST 2T has coaxial 75 ohm BNC input connector and differential outputs, made in the form of contact connector with 3 contacts. Two contacts are intended for connection of twisted pair of wires with different phases, and third contact is for net ground wire.
* Receiver TWIST - R has differential input for twisted pairs in the form of contact connector with 3 contacts. Two contacts are intended for connection of 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.
* Both devices have built in power-unit for ac power supply 220 V.
* Devices are intended for work outdoors (category IP54) and are made exclusively on integral circuits of JSC RD ALFA md . They are notable for small power consumption, reliability, simplicity of operation.
Output impedance twisted pair wires
Equalization of amplitude frequency characteristic at frequency 5 Hz
Increment of equalization of amplitude frequency characteristic at frequency 5 Hz
Recommended transmission distance*
Input impedance twisted pair wires
Video gain input - output (adjusted)
Discrete equalization of amplitude frequency characteristic at frequency 5 Hz
*Losses in twisted pair at frequency 4 MHz not more than 4.1 dB at 100 m
Differential voltage on signal wires, not more than
