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11 Cards in this Set
- Front
- Back
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Transmission media are usually categorised as _______. |
Guided or unguided. |
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Smoke signals are an example of communication through _______. |
An unguided medium. |
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_______ cable consists of an inner copper core and a secondary conducting outer core |
Coaxial. |
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In fibre optics the signal source is ______ waves |
Light |
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What is the major factor that makes coaxial cable less susceptible to noise than twisted-pair cable? |
Outer conductor. |
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In an environment with many high-voltage devices the best transmission medium would be ________. |
Optical fibre. |
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In an optical fibre the inner core is ________ the cladding. |
More dense than. |
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The inner core of an optical fibre is ________ in composition. |
Glass or plastic. |
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When making connections in fibre-optics which of the following would contribute to signal distortion? |
All of the above. |
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In ________ propagation the beam of propagated light is almost horizontal and the low-density core has a small diameter compared with the cores of the other propagation modes. |
Single mode. |
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________ is the propagation method subject to most distortion. |
Multimode step-index |
