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Video system

PAL

Video Balun Set: Etrix 1VP-C (BNC lead)
Code: M16658
Price w/o taxPriceDisc.Validity  
3.05 EUR3.05 EUR0 %
Video transformer TR-1Q with BNC socket - CLEARANCE SALE!
View of the baluns
Video transformer TR-1Q with BNC socket - CLEARANCE SALE!
View of the packaging
The set is designed to transmit video signal from a single source using a twisted-pair cable. Each of the video transformers (baluns) has a flexible cable terminated with BNC connector, which ensures easy connection even to closely spaced BNC sockets.
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 wires to the correct terminals: (+) to (+) and (-) to (-). Improper connection will cause interference.
Specifications:
Name1VP-C
CodeM1668
Range

400 m (CVBS)

150 m (HD-TVI, AHD)

Video level (CVBS, 75 Ω)1 Vpp
Insertion loss-0.5 dB (f=5 MHz)
Bandwidth0 ... 50 MHz (-3 dB)
CMRR (dB @ 5MHz)60 dB
Input/output impedance (coaxial)
75 Ω
Input/output impedance (UTP)100 Ω
Coaxial connectorBNC male plug
UTP connectorsScrew terminals
Operating temperature/humidity (RH)
0...55ºC / <95%
Weight (1 pc.)
0.016 kg
Dimensions (WxDxH)15 x 47 x 15 mm (main part)
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 Vz 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 Vb value. The CMRR is calculated using the following formula:
CMRR = 20*LOG(Vb/Vz)
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 w/o taxPriceDisc.Validity  
3.05 EUR3.05 EUR0 %
 
Video Balun Set: Etrix 1VP-C (BNC lead)
Code: M16658