Video Transmitter/Receiver (Balun): 1VP-B (BNC, angular, 2pcs)

Code: M16654
€3.36
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The 1VP-B balun (passive transformer) is designed to transmit a video signal from an unbalanced (75 ohm) video output to an unbalanced (75 ohm) video input, via a twisted pair of UTP, FTP, or STP cable, using one device on each end of the transmission line.
• Transmission of video signal via a twisted-pair cable
• PAL (CVBS): max transmission distance of 400 m,
• HD-TVI, AHD:max transmission distance of 200 m (720p) or 150 m (1080p),
• HD-CVI: max transmission distance of 200 m.

Warranty

3-year warranty.

Support

Details

The 1VP-B balun (passive transformer) is designed to transmit video signal from an unbalanced (75 ohm) output to an unbalanced (75 ohm) video input, via a twisted pair of UTP, FTP, or STP cable, using one device on each end of the transmission line. Due to angular shape, it integrates well with the source and the receiver of the signal.
The transformer matches the impedance of coaxial video output (75 ohm) to the impedance of the balanced line (100 ohm), ensuring proper video transmission via cat. 5 twisted pair cable from many types of cameras:
  • PAL (CVBS) up to 400 m
  • HD-TVI, AHD up to 200 m (720p) or 150m (1080p)
  • HD-CVI up to 200m
The installer should pay attention to connecting the appropriate leads to the correct terminals: (+) to (+) and (-) to (-). Improper connection will cause interference.
CMRR in video transformers (baluns). "Balun" is the short for "Balance-Unbalance", in CCTV applications meaning a transformer for changing the transmission medium from a coaxial cable to a twisted pair, and vice versa. The biggest advantages of using balanced transmission cables are lower costs, higher resistance to external interferences, and possibility of using longer transmission lines. Due to identical arrangement of the two wires of a balanced line, the interferences are also the same and can be cancelled in a differential balanced input of the receiver. It is not possible in the case of a coaxial transmission line.
The ability of a video transformer to cancel the common interferences identical in both wires is characterized by Common Mode Rejection Ratio (CMRR). It is the ratio of the error signal at the asymmetric output of the transformer to the interference on the both balance inputs. The parameter can be measured, for example, by applying high, common interference signal V.z. to the both balance inputs (i.e. shorted, to eliminate a differential signal). Under such conditions, an ideal transformer would not provide any signal on its unbalanced output, but the real device will demonstrate a V.b. value. The CMRR is calculated using the following formula:
CMRR = 20*LOG(V.b./V.z.)
The CMRR of Etrix baluns (in the 15 kHz to 6 MHz range) is 60 dB. It means that they attenuate the common signals (interferences) 1000 times.
Price for blister packaging (2 pcs.)

Specifications

Model 1VP-B
Product type Video transformer
Brand Etrix
Input parameters number 1
connector type BNC
Operating band MHz 0 ... 50
Supported signals and maximum resolution AHD, HD-CVI, HD-TVI (5 MP)), CVBS
impedance ohm 75
Output parameters number 4
connector type Screw terminals
impedance ohm 100
Gain dB 0
Operating temperature °C -10 .. 55
Dimensions mm 15 × 33 × 24