Description
-
32 Port Active UTP Video Hub -
Up to 1,500 feet (450 meters) with passive transceivers
Video Receiver Hub - 32 Ports - Selectable 110 ft to 1,500 ft.
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 VH3251 can receive video 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.
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
- LEDs 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
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.
| Transceiver Unit | |
| Size | 1 RU x 9.5" (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 1,500 feet (450 meters) with passive transceivers |
| 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 |
| 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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