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 VH451
can receive video up to 1,500 feet 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
- LED’s to indicate video detection
- Compact design
- Video can be run in the same cable with
telephone, computer signals and power
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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 1,500 feet (457 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/304 meters) |
|
Normal Capacitance |
17pF/ft. |
|
Impedence |
100 Ohms +/- 20% |
|
UTP Category |
2 or better |
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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.
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