FAQ
Unshielded Twisted Pair Cabling Systems & Solutions FAQ:
UTP = Unshielded Twisted Pair

    Coax & More   |    UTP Video Transmission: Tips & Troubleshooting

    Wire and Installation

  1. What kind of wire to use with UTP BALUN Twisted Pair Transmission products?
  2. Can RJ11 ordinary telephone wire be used with UTP BALUN Twisted Pair Transmission products?
  3. Can Category 6 wire be used with UTP BALUN Twisted Pair Transmission products?
  4. Can UTP wire to put with other wires in a multi pair wire bundle?
  5. Can spare pairs in an existing CAT 5 network cable to be used with UTP BALUN Twisted Pair Transmission products?

  6. General Application

  7. What is the advantage to use UTP BALUN Twisted Pair Transmission products? SMART, FAST, COST EFFECTIVE SOLUTION
  8. Can use one single CAT 5 network cable to transmit video signals and control data?
  9. Can UTP BALUN devices support broadband RF/VHF/UHF?
  10. Can UTP BALUN devices transmit VGA?
  11. Can UTP BALUN devices transmit satellite or cable TV?

  12. Troubleshooting

  13. Why is there a “rolling” on the video image?
  14. Why is there “Power Waving” interference on the video image?
  15. Why the color become light or video image not stable, even no video image after connecting DVR, but the video image is good while into monitor directly?
  16. When one video image need distribute to 2 monitoring, the monitor picture looks ok. But why when into the DVR, video picture not stable or color become B/W ?
  17. Why the video image too bright or snow, wavy when testing or using active twisted pair transmission products?
  18. Why is there a ghost or double, cascade shadow (one channel comes out the shadow of other channel image) occurred when using Series Connection on twisted pair transmission products?
  19. Why the video image is wavy and shaking under one channel transmission application?
  20. Why using one network cable to transmit 4 channels, there are one channel image is normal, but other two or three images have cascade shadow (one channel comes out the shadow of other channel image)?
  21. Why the camera and video transceivers at outdoor have higher defective rate and quality not stable?
  22. Will RF interfere with the video signal when using UTP BALUN devices?

1.
What kind of wire to use with UTP BALUN Twisted Pair Transmission products?
 

Use UTP (unshielded twisted pair) CAT 5 24 AWG (or over) to have the best transmission quality performance. To use STP (shielded twisted pair) cable, the shielded would cause internal signal interference, so the transmission range would be shorter (1.5KM--- >0.8KM) than UTP cable.

Un-twisted wire not to be recommended, which easy have interference and range would be shorter.

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2.
Can RJ11 ordinary telephone wire be used with UTP BALUN Twisted Pair Transmission products?
 

Yes, UTP BALUN's Video Transceivers could use ordinary telephone wire to transmit and the range up to 1000 feet (300 meters). But the interference would occur easily, therefore we do not recommend this solution unless special environment requested.

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3.
Can Category 6 wire be used with UTP BALUN Twisted Pair Transmission products?
 

Yes, Use category 6 twisted pair wire, the range would be longer and have highly interference immunity.

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4.
Can UTP wire to put with other wires in a multi pair wire bundle?
 
Yes, one of benefits to use UTP BALUN transceivers is interference rejection. UTP BALUN video signals can reside in the same wire bundle as multiple video signals, telephone wire, Ethernet, coaxial…etc. Power wire is not to be recommended to put in the same bundle to avoid interference.
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5.
Can spare pairs in an existing CAT 5 network cable to be used with UTP BALUN Twisted Pair Transmission products?
 
 
Yes, you could use any spare pairs to transmit video image via UTP BALUN products. Normally, PC would use the first and second pairs on the Internet, so the third and fourth pair could be used for video signal transmission, be sure this cable not through any hub.
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6.
What is the advantage to use UTP BALUN Twisted Pair Transmission products? SMART, FAST, COST EFFECTIVE SOLUTION
 
 
  1. Coaxial cabling transmission over 650 feet (200 meters) (RG59), the video signal would loss and have bad video image. Using UTP BALUN passive video transceiver range could up to 1000 feet (300 meters) for Color, 2000 feet (650 meters) for B/W, even 1KM, 2.4KM to work with active transceiver.
  2. To use UTP BALUN's VPB400TRJS 4 channel video balun twisted pair transceiver, only need one single CAT 5 cable to transmit 4 video signals for cable saving and fast installation.
  3. CAT 5 cable cost is only half of Coaxial cable and much more easy installation than coaxial cable.
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7.
Can use one single CAT 5 network cable to transmit video signals and control data?
 
Yes, using 4 pairs CAT 5 twisted pair cable that could use UTP BALUN model VPB111RJ to transmit video, power and data signals. You can also use our VPB444TRJ to transmit 4 set of video, power and data signals.
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8.
Can UTP BALUN devices support broadband RF/VHF/UHF?
 

No, UTP BALUN transceivers do not support RF/VHF/UHF signal. Unless special design demodulator and modulator to be used.

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9.
Can UTP BALUN devices transmit VGA?
 

Yes, you could use VGA CONVERTER can be transmitted to Analog signal to Digital signal (VAG). Or use UTP BALUN VGA Extender by using CAT5 to extent VGA signal up to 3000 feet.

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10.
Can UTP BALUN devices transmit satellite or cable TV?
 
No, UTP BALUN transceivers do not support the wide bandwidth cable TV signal. However, a single channel can be sent if a demodulator and modulator are used.
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11.
Why is there a “rolling” on the video image?
 
The reason to cause “rolling” image is from the power interference during transmission or the video transmission range is too big between 2 or multi channels to have the signal not balanced. You could add VGIBNC (High Performance Video Ground Loop Isolator Filter) for extra interference rejection.
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12.
Why is there “Power Waving” interference on the video image?
 

Coaxial cabling either twisted pair cabling may have “Power Waving” interferences that most from High Frequency (such as radio) or Differences in ground potentials are typically caused by unbalanced power line loads. Then you could add our VGIBNC “High Performance Video Ground Loop Isolator Filter” to eliminate the interference.

Generally, It is not easy to find out where this kind of interference from, so we would recommend use monitor to check each connecting point (between two wire connection), to find out where is the source of interference.

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13.
Why the color become light or video image not stable, even no video image after connecting DVR, but the video image is good while into monitor directly?
 
 

Video signal would be degradation once through any cable transmission, either coaxial or twisted pair wire. Especially the video signal through DVR (analog to digital signal) that signal loss would be bigger. If the video signal output less than 0.8Vpp, the picture display would lack quality and have bad or ghost video image. You could use our following products for improvement: for twisted pair cabling, you could alternate the passive receiver to active type VAB100R / VAB400R / VAB800R / VAB1600R, which built in brightness and sharpness controls. If range over 1.5km, you could add one more active video transmitter for series connection.

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14.
When one video image need distribute to 2 monitoring, the monitor picture looks ok. But why when into the DVR, video picture not stable or color become B/W ?
 
 
One Video signal split into 2 channel that the signal would be degradation to cause the picture not stable. Please use our Video Distributor VA123BNC/VD128BR/VD2216BNC/VD6212BNC/VD16248BNC which make amplify and stable video signal before distribute the signal.
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15.
Why the video image too bright or snow, wavy when testing or using active twisted pair transmission products?
 
 

Please correct the following two conditions :

  1. These products are designed for long range transmission, the unit built in video amplifier function. If your transmission range under 300 feet (100 meters), the video gain function is too big to have snow or wavy, bright image occurred. Recommend to use them with range at least over 300 feet (100 meters) or alternate UTP BALUN passive video transceivers for short range transmission as well as cost saving.
  2. The active receivers have "5 position distance range switch" for different range transmission. Please switch to appropriate range upon your application to avoid any weak or bad image.
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16.
Why is there a ghost or double, cascade shadow (one channel comes out the shadow of other channel image) occurred when using Series Connection on twisted pair transmission products?
 
 

Please make sure to make good cable connection to avoid video loss, interference even cable oxidation. The best way is soldering the cable or use communication cable UY connector Furthermore do make sure to cut the unnecessary cable while doing the series cable connection as the following:

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17.
Why the video image is wavy and shaking under one channel transmission application?
 

Wrong twisted pair cable connection would cause the video image wavy and shaking if only use one pair wire for one channel video transmission, please check the cable connection and make sure the TX wire and RX wire must be equivalent. ( Example: TX: 1, 2 = RX: 1, 2 or TX: 7,8 = RX: 7,8).

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18.
Why using one network cable to transmit 4 channels, there are one channel image is normal, but other two or three images have cascade shadow (one channel comes out the shadow of other channel image)?
 
 
Please check the networking cable on TX and RX must be under standard wiring 1, 2, 3, 6, 5, 4, 7, 8 into RJ45 connector as following:
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19.
Why the camera and video transceivers at outdoor have higher defective rate and quality not stable?
 
Normally, the cabling at outdoor and have long range transmission for camera. That would have higher rate on surge or lighting damage, even some of our products built in TVS ( Transient Diode for Surge Protection), but the products still damaged once have stronger surge or lighting.
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20.
Will RF interfere with the video signal when using UTP BALUN devices?
 
No, UTP BALUN device is highly immune to interference. CAT 5 UTP twisted pair wire can immunity the RF interference. The only concerned is the high power (signal noise ratio) RF signal would have video interference occurred, neither coaxial nor twisted pair cabling transmission. You could try to use twisted pair wire with overall aluminum foil Mylar shield with one drain wire and braided shield. Or move away from high interference area.
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