Multimode optical fiber signal compensation

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Multimode optical fiber signal compensation

Postby JohnOtto » Wed Mar 14, 2018 1:55 pm

Hi,

In our application we are using multimode optical fiber to send signal from PTZ camera to the video feed using sdi over fiber kit, the problem is our optical distance is longer about 100m but this module can loud only 500m for multimode fiber, is there any compensation modules available to bust the optical signal ?

Any help would be appreciated!
Thanks,
JohnOtto
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Re: Multimode optical fiber signal compensation

Postby Karlsweldt » Thu Mar 15, 2018 11:21 am

When you note "bust" the signal, are you referring to a boost, or lessening? Anything else hogging bandwidth?
There are multi-band repeaters that may work, but require a quality power source.
Is the cable system of premium grade? Some brands self-attenuate more than others.
Analog data on long cables tends to self-degrade (attenuate) more than digital data signals.
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Re: Multimode optical fiber signal compensation

Postby JohnOtto » Fri Mar 16, 2018 9:59 am

Thanks Karl, yes I am referring to boost signal, is there any compensation modules available?
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Re: Multimode optical fiber signal compensation

Postby Karlsweldt » Sat Mar 17, 2018 7:56 am

Whether it be analog, digital, or video data, distance is subject to self-attenuation regardless of carrier medium. Hard wire is the most susceptible, fiber optics are less so. Fiber optics have more than 10x the bandwidth of hard wire carriers, using different color spectrums and frequencies. RF carriers need huge power input to cover great distances.
There are 2-way repeaters for almost any type of carrier, but the choice of frequencies for broad-band or narrow-band depends on needs and distance. Some repeaters can maintain signal levels for only a few hundred feet, others (like for CATV) may maintain signal levels for more than a mile.
Know what frequencies you are using, and bandwidth. Then search for the proper equipment.
One site that offers video repeaters is http://www.tacticalelectronics.com/
Another is http://www.cellcommsolutions.com/fiber- ... aters.html
There are others. Choose a reputable brand, with a decent warranty. Could be a bit costly though.
Consider a conversion from pure video signals to digital signals, less bandwidth and loss of quality. And normally cover greater distances with less attenuation.
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