Document Number:
VH3256
Model
VH3256 32 Port Active UTP Video Hub;
  Up to 3,000 feet (914 meters) with passive transceivers
  Up to 6,000 feet (1,828 meters) with active transceivers
Revision Number:
112003

Description:
32 port active video hubs with built-in surge suppression, ground loop isolation, gain and loss control, 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 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 VH3256 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
  • Highly compact, only one rack unit in height
  • Video can be run in the same cable with telephone, computer signals and power

32 Port Active UTP Video Hub

Size 1 RU x 6.0"D
Power Requirements 24 VAC @ 450mA
(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
Enclosure Type Standard 19" rack 1 RU in height
Shipping Weight 17 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. Multi-pair 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.

NITEK - VH3256 - 32 Port Active UTP Video Hub; CCTV Applications up to 3,000 ft with passive transceivers.

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Product Specifications
Adobe .PDF
Word .DOC
CAD
VH851/VH1651/VH3251
VH856/VH1656/VH3256 Spec 
-- VH3256 dwg
VH3256 A&E Spec  VH3256 A&E Spec  VH3256 Visio
VH3000 Manual  -- --
TR560x8 Manual   --
Ordering Information
PART DESCRIPTION
VH851 8 Port Active Receiver Hub w/ surge suppression; up to 1,500 feet (457 meters)
VH1651 16 Port Active Receiver Hub w/ surge suppression; up to 1,500 feet (457 meters)
VH3251 32 Port Active Receiver Hub w/ surge suppression; up to 1,500 feet (457 meters)
VH856 8 Port Active UTP Receiver Hub w/ surge suppression; up to 3,000 feet (914 meters)
VH1656 16 Port Active UTP Receiver Hub w/ surge suppression; up to 3,000 feet (914 meters)
VH3256 32 Port Active UTP Receiver Hub w/ surge suppression; up to 3,000 feet (914 meters)
VH3256 works with the following equipment
VB37M BNC Male Video Balun; up to 750 feet (228 meters)
VB37F BNC Female Video Balun; up to 750 feet (228 meters)
VB39M BNC Male Video Balun w/ surge suppression;
up to 750 feet (228 meters)
VB39F BNC Female Video Balun w/ surge suppression;
up to 750 feet (228 meters)
VB41x4 4 Balun Card w/ surge suppression for Rack;
up to 750 feet (228 meters)
VH439 4 Port UTP Video Balun Mini-Hub w/ surge suppression; up to 750 feet (228 meters)
VH839 8 Port UTP Video Balun Hub w/ surge suppression; up to 750 feet (228 meters)
VH1639 16 Port UTP Video Balun Hub w/ surge suppression; up to 750 feet (228 meters)
TT560 Active Transmitter w/ surge suppression up to 6,000 feet (1,828 meters)
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