Glossary
| Term | Main definition |
|---|---|
| RCE | Remote Control Unit
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| RCU |
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| RCUA |
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| RDS | Rigging Data Sheet – details the existing and required radio requirements for a cell site. Owned by the Cell Planner.
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| Reactance |
A measure of the combined effects of capacitance and
inductance on an alternating current. The amount of
such opposition varies with the frequency of the current.
The reactance of a capacitor decreases with an increase
in frequency. The opposite occurs with an inductance.
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| Receiver |
A device whose purpose is to capture transmitted signal
energy and convert that energy for useful functions. In
fiber-optic systems, an electronic component that converts
light energy to electrical energy.
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| Receiver sensitivity |
In fiber optics, the amount of optical power required by a
particular receiver in order to transmit a signal with few
errors. Can be considered a measure of the overall quality
of receiver. The more sensitive the receiver, the better
its quality.
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| Receiver sensitivity |
In fiber optics, the amount of optical power required by a
particular receiver in order to transmit a signal with few
errors. Can be considered a measure of the overall quality
of receiver. The more sensitive the receiver, the better
its quality.
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| Receptacle |
The part of a fiber-optic receiver that accepts a connector
and aligns the ferrule for proper optical transmission.
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| Reflectance |
A percentage that represents the amount of light that is
reflected back along the path of transmission from the
coupling region, the connector, or a terminated fiber.
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| Reflection |
(1) A return of electromagnetic energy that occurs at
an impedance mismatch in a transmission line, such
as a LAN cable. See also return loss. (2) The immediate
and opposite change in direction that happens to a
light beam when it strikes a reflective surface. Reflection
causes several spectral problems, including high optical
distortion and enhanced intensity noise.
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| Refraction |
The bending of a beam of light as it enters a medium of
different density. Refraction occurs as the velocity of the
light changes between materials of two different refractive
indexes.
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| Refractive index gradient |
The change in refractive index with respect to the distance
from the axis of an optical fiber.
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| Refractive index profile |
A graphical description of the relationship between the
refractive indexes of the core and the cladding in an optical
fiber.
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| Regenerator |
A receiver-transmitter pair that detects a weak signal,
cleans it up, then sends the regenerated signal through
another length of fiber.
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