PRODUCTS ▬ VH451

Nitek Four Port Active UTP Video Receiver

Active Video Balun Hub -

4 Port Receiver

Model Number: VH451

  • Four Active Video Balun Receivers for UTP
  • Up to 1,500 feet (450 meters) with Passive Transmitters
  • Cable distances are switch selectable from 100 to 1,500 feet (450 meters)
  • Built-in ground loop isolation and surge suppression

    • 4 port active video mini-hub with gain and loss control, built-in surge suppression, ground loop isolation and video detection. Systems operate with other Nitek UTP video equipment including video transceiver hubs, standard video balun transceivers, active transmitters or any twisted pair equipped camera.

    These active video mini-hubs are multi-channel video receiver devices that provide a low cost means of receiving quality live video over category UTP cabling. The systems can also adapt to existing communication and computer network spare pairs or new cable installations. The VH451 can be used on video runs up to 1,500 feet (450 meters) when used with passive transmitters. These hubs provide superior immunity from noise and interference, even when run in common raceways with AC

    • Quality video over ordinary twisted pair cable
    • Built-in surge suppression
    • Built-in ground loop isolation
    • Convenient access to DIP switches for accurate gain and loss control
    • High immunity to noise and interference
    • LEDs to indicate video detection
    • Compact design
    • Video can be run in the same cable with telephone, computer signals and power

    Wire and Cable Recommendations

    Twisted Sender is recommended for use with unshielded twisted pair (UTP) wiring. The systems will operate over wire gauges from 26 AWG through 12 AWG but are optimized for 24 AWG. Category cabling may be used. Individually shielded pairs should be avoided as they drastically reduce the operating range of the systems. Multipair cable with an overall shield is acceptable. Video can be operated in the same communication cable coexistent with telephone, computer, control signals, power voltages and other video signals. While video may be routed through telephone punch-down block terminals, any bridge-taps, also called T-taps and any resistive, capacitive or inductive devices MUST BE removed from the pair.

    For more specific information regarding wire types, gauges and proper installation techniques, please call (800) 528-4343 for technical assistance.

     Transceiver Unit
    Size 5.5" (W) x 1.8" (H) x 4.6" (D)
    Power Requirements 24 VAC 300mA max. Class 2
    (Wall transformer provided with unit)
    Video Input Balanced low voltage current loop
    Video Output 1 Vpp composite video
    monochrome or color
    Common Mode Rejection >70dBNV-452R
    Video Format RS170, NTSC, PAL, SECAM,
    CCIR (Color or B/W)
    Twisted Pair Connection Screw terminals providing balanced low voltage current loop
    Operating Frequency DC to 10 MHz
    Recommended
    Transmission Distance    		 Up to 1,500 feet (450 meters) w/passive baluns
    Transient Immunity Built-in
    Temperature Range -20 degrees C to +55 degrees C
    Humidity Range 0 to 98% non-condensing
    Shipping Weight 3 lbs
    Wire Spec 26 to 12 AWG Unshielded Twisted Pair (UTP)
    DC Loop Resistance 51 Ohms/1,000 feet (max) (51 Ohms/300 meters)
    Normal Capacitance 17pF/ft.
    Impedance 100 Ohms +/- 20%
    UTP Category 2 or better

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