Description:
4 Port video balun mini-hub with built-in surge
suppression. System operates with other Nitek
UTP video equipment including, video balun hubs,
standard video balun transceivers or active receivers.
The VH439 video balun mini-hub is a multi-channel video
transmission device that provides a low cost means of sending
quality live video over Category UTP cabling. The system
can also adapt to existing communication and computer
network spare pairs. The VH439 can send video up
to 750 feet (228 meters) when used with other products in the VB37 or
VB39 family.
When used with model TR515 or TR560 active receivers,
distances of 1,500 feet (457 meters) and 3,000 feet (914 meters) respectively can be
attained. The VH439 is designed to provide superior immunity
from noise and interference, such as RFI and EMI. |
Features:
- Quality video over ordinary twisted pair cable
- Built-in protection from power surges and transients
- High immunity to noise and interference
- Passive units require no power
- Video & P/T/Z over a single pair with “up-the-coax”
systems
- Highly compact, wall-mounted unit
- RJ45 modular jack or screw terminals for easy
connection when used with other passive baluns
- Video can be run in the same cable with telephone,
computer signals and power
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VH439 - 4 Port Video Balun Mini-Hub
| Size |
1.6"H x 4.3"W x 2.5"D |
| Power Requirements |
NONE REQUIRED |
| Video Input Connection |
Standard BNC connector for 1 Vpp composite video
Monochrome or Color |
| Video Format |
RS170, NTSC, PAL, SECAM,
CCIR (Color or B/W) |
Twisted Pair
Connection |
Screw terminals or RJ45 modular connector providing balanced
low voltage current loop |
Common Mode
Rejection |
>70dB |
| Operating Frequency |
DC to 10 MHz |
Recommended
Transmission Distance |
w/passive units - Up to 750 feet (228 meters) |
| Transient Immunity |
Built-in |
| Shipping Weight |
1 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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Applications:
- Structured cabling environments
- Multi-camera applications through conduit (more
cameras through a smaller diameter)
- Combining mid-span video runs into a single cable
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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. 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.
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