Description:
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 VH456 can be used on video runs up to 3,000 feet (914 meters) when used with passive transmitters or distances of up to 6,000 feet (1,828 meters) with the Nitek TT560 active transmitter. These hubs provide superior immunity from noise and interference, even when run in common raceways with AC.

Features:

• 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
• LED’s to indicate video detection
• Compact design
• Video can be run in the same cable with
  telephone, computer signals and power

4 port Active UTP Video Mini-Hubs

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		>70dB
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 3,000 feet (914 meters) w/passive baluns - Up to 6,000 feet (1,828 meters) w/active transmitters
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/304 meters)
	Normal Capacitance	17pF/ft.
	Impedence	100 Ohms +/- 20%
	UTP Category	2 or better

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.