Description:
Video balun transceivers for twisted pair up to
1,000 feet. Two types are available. The basic
VB37 model and the VB39 with built-in surge
suppression for added equipment protection.
Video Balun Transceiver is a video transmission device that provides a low cost means of sending live
video over unshielded twisted pair, point-to-point wiring
for distances of up to 750 feet (228 meters). The VB37 and VB39 are
compatible with all of the “up-the-coax” control systems.
A basic system uses (2) VB37 or (2) VB39 units,
one at each end of a twisted pair of wires. These units
are intended for use over existing in-house telephone
wiring, Category 5 wiring or other twisted pair cable
runs to provide a convenient, cost-effective alternative
to coax.
The VB37 and VB39 are designed to provide
superior immunity from noise and interference
even when running next to line power!
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Features:
- Quality video over ordinary twisted pair cable
- Immunity to noise and interference
- Built-in surge suppression on VB39 model
- Passive devices - do not require power
- Video & P/T/Z over a single pair (with “up-the-coax”
systems)
- M - version mounts directly to camera or video source
- Weatherproof design
- Easier to install than coax
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Transceiver Unit
| Size |
1.3"H x 2.0"W x .95"D |
| Power Requirements |
NONE REQUIRED |
| Input |
1 vpp composite video
monochrome or color |
| Output |
Balanced low voltage current loop |
| Shipping Weight |
1 lb |
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System (2 Transceivers Required)
| Video Format |
RS170, NTSC, PAL, SECAM,
CCIR (Color or B/W) |
| Video Input |
1 vpp composite video
monochrome or color |
| Operating Frequency |
DC to 10 MHz |
Common Mode
Rejection |
>60 dB typ. |
| Temperature Range |
-40 degrees C to +85 degrees C |
| Humidity Range |
0 to 98%, non-condensing |
| Transient Immunity |
6,000 V 1.2uS x 50 uS
per ANSI / IEE 587 C62.41 B3
3,000 A 8uS x 20 uS
when ground screw terminal is
connected to earth-ground |
| Enclosure Material |
Black ABS flame retardant
plastic |
| Twisted Pair Connection |
Screw terminals |
| Wire Spec |
26 to 12 AWG unshielded
twisted pair (UTP) |
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DC Loop Resistance |
51 Ohms/1,000 feet (max)
(51 Ohms/304 meters) |
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Normal Capacitance |
17pF/ft. |
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Impedence |
100 Ohms +/- 20% |
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UTP Category |
2 or better |
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| VB37F |
VB39F |
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Applications:
- Intra-building CCTV installations (instead of coaxial cable)
- Structured cabling (Category 5) environments
- To eliminate requirement for Plenum Coax
- Multi-camera applications through conduit (more cameras through a smaller diameter)
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| PART |
DESCRIPTION |
| VB37F |
BNC Female Video Balun; up to 750 feet (228 meters) |
| VB39F |
BNC Male Video Balun w/ surge suppression;
up to 750 feet (228 meters) |
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SYSTEM COMPONENTS
Two VB37 devices M or F in any combination are required for
transmission over a single UTP.
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Wire and Cable Recommendations
The VB37 and VB39 are recommended for use with unshielded twisted pair (UTP) wiring. The systems will operate over wire gauges from 26 AWG through 12 AWG. Category 2, 3, 4 or 5 cable 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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