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General
General
Are OURTEN transceiver racks mountable?
Yes. The SJ series of multi-channel hubs are rack-mountable and include the necessary hardware.
Will RF interfere with the video when using OURTEN devices?
No. The OURTEN signal is highly immune to interference. OURTEN signals are sent differentially. That is, the equipment is only concerned with the voltage difference between the two conductors. RF or other fields will still couple into the conductors, but will do so in each conductor equally. This Common-Mode signal is ignored by the OURTEN equipment, which has a 60 dB Common-Mode Rejection Ratio (CMRR).
Wire & Wiring
Wire&Wiring
What kind of wire do I need to use with OURTEN devices?
Use Unshielded Twisted Pair, Category 5 or better, 22-24AWG, stranded or solid. Using a multi-pair wire (six pairs or more) with an overall shield is OK.
Can shielded twisted pair be used?
Some customers have successfully used shielded wire up to a few hundred feet. However OURTEN does not recommend it. Its high-frequency roll-off will severely degrade the distance performance. Use of an amplified receiver can compensate for some signal loss. Multi-pair wire (six pairs or more) can have an overall shield without degradation.
Can the wire path have splices?
Yes. OURTEN recommends designing CCTV systems in much the same way as phone/data systems are designed. You can splice the wire or use 66-blocks or 110-blocks to make connections. Video can be sent through a dozen of these connections without significant degradation.
Can I transmit more than one video signal in a multi-pair wire bundle?
Yes. One of the benefits of using OURTEN transceivers is interference rejection. OURTEN video signals can reside in the same wire bundle as multiple video signals, ringing telephones, Ethernet, 24VAC, RS-422, RS-485, etc.
Can video signals be sent in opposite directions within the same wire bundle?
Yes, however, due to near-end crosstalk, there are distance limitations. When using Category 2 or 3 wire, do not send video in opposite directions within the same wire bundle more than 1000’. With Category 5, do not send bidirectional video more than 2000’.
Can Category 6 wire be used?
Yes. Unshielded Twisted Pair wire, Category 2 or better, can be used with OURTEN.
Can un-twisted wire be used?
Some customers have successfully used un-twisted wire at short distances. OURTEN does not recommend it due to its interference susceptibility.
Can I use spare pairs in an existing telephone system to transmit video using OURTEN devices?
Yes. One of the advantages of UTP CCTV is that the wiring for video can reside along with telephone system wiring. However, be sure to use “dry copper” pairs. There should be no dial-tone, 48 volts, loading coils, bridge-taps or switching on the chosen pairs.
Can I install my UTP bundle near RF antennas, flourescent lights, motors, generators, or high voltage?
Yes. The OURTEN signal is highly immune to interference, allowing
it to be installed near these noise-generating sources. For life-safety and electrical code reasons, never install OURTEN in the same conduit as high-voltage wiring.
Supported Signals
Supported Signals
Can OURTEN devices transmit VGA?
Yes. The NTSC output of a VGA or SVGA scan converter can be transmitted using OURTEN.
How can I send video from one camera to more than one monitor using OURTEN?
There are a couple ways to accomplish this. One is to connect your video source to a distribution amplifier. This provides multiple video outputs for each input. Connect a transmitter and receiver to each wire run leading back to each monitor.
The alternate method is to send the video signal to the first monitor using a pair of transceivers. Then loop out of that monitor and use another pair of transceivers to continue on to the next monitor.
What is the supported bandwidth?
DC to 6 megahertz, clear channel
Do OURTEN transceivers support broadband RF/VHF/UHF?
No. Use demodulators and modulators to convert to baseband composite video.
Can I transmit satellite or cable TV using OURTEN transceivers?
No. OURTEN transceivers do not support the wide bandwidth cable TV signal. However, a single channel can be sent if a demodulator and modulator are used.
Can I transmit a multiplexed signal on unshielded twisted pair?
Yes. That baseband composite video signal is supported.
Can OURTEN transmit RS-422 or RS-485 signals?
RS-422 or RS-485 signals are hard-wired between the P/T/Z equipment and are not transmitted or received by OURTEN transceivers. The data signal may be sent on a wire pair within the same bundle as the video signal.
Troubleshooting
Troubleshooting
When transmitting video between passive OURTEN transceivers, the video is wavy and there is a dark bar that rolls upward on the monitor. Why?
This is the result of a ground loop. Use an amplified receiver (which has built-in ground lifting), or remove the ground at the camera end. Be sure that floating the camera conforms to local/regional and National Electrical Codes.
Why is the green light blinking on the active receiver?
This usually indicates a poor connection along the wire path.
Why is there a double image in my video?
Faint shadows of the original signal shifting to the right, or “Ghosting” occurs when there is an impedence mismatch along the wire. Verify that the monitor is terminated with 75 (not in loop-through). Check for and remove any bridge-taps (another wire pair connected to the wire run).
Why does my video look like a scrambled Cable TV signal?
This typically indicates reversed polarity.
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.
To solve this question, you could alternate the passive receivers to active ones, which built in brightness and sharpness controls. If range is over 1.5Km, you could add one more sets active video transmitter/receiver for series connection.
Why the video image too bright or snow, wavy when testing or using OURTEN active transceivers?
Please correct the following two conditions:
A. These transceivers are designed for long range transmission, the unit built in video amplifier function. If your transmission range under 100 meters, the video gain function is too big to have snow or wavy, bright image occurred. Recommend to use OURTEN passive video transceivers for short range transmission as well as cost saving.
B. The active receiver has "6 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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