Prisma II 1310 nm High Density Transmitter and Host Module ...

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Glossary
information includes device features, data throughput statistics, traffic overloads, and errors.
nm
nanometer. One billionth of a meter.
NMS
network management system. A software system designed specifically to monitor a network
and to facilitate troubleshooting.
OMI
optical modulation index.
PLL
phase lock loop. An electronic servo system controlling an oscillator to maintain a constant
phase angle relative to a reference signal.
QAM
quadrature amplitude modulation. A phase modulation technique for representing digital
information and transmitting that data with minimal bandwidth. Both phase and amplitude
of carrier waves are altered to represent the binary code. By manipulating two factors, more
discrete digital states are possible and therefore larger binary schemes can be represented.
RF
radio frequency. The frequency in the portion of the electromagnetic spectrum that is above
the audio frequencies and below the infrared frequencies, used in radio transmission systems.
RMA
return material authorization. A form used to return products.
RT
remote terminal. Remote equipment of a supervisory system.
RX
receive or receiver.
SBS
stimulated Brillouin scattering. The easiest fiber nonlinearity to trigger. When a powerful
lightwave travels through a fiber, it interacts with acoustical vibration modes in the glass.
This causes a scattering mechanism to be formed that reflects much of the light back to the
source.
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