Cisco GainMaker Optoelectronic Node 1GHz with 55 70 MHz Split Guía De Instalación
Glossary
N
Nm
Newton meter. A measure of torque defined by the application of one Newton of force on a
lever at a point on the lever that is one meter from the pivot point. (1 Nm = 0.737561 ft-lb)
NPR
noise power ratio.
O
OIB
optical interface board.
R
RCM
reverse configuration module.
reverse path
Signal flow direction toward the headend.
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.
RX
receive or receiver.
S
S/N or SNR
signal-to-noise ratio. The ratio, in decibels, of the maximum peak-to-peak voltage of the video
signal, including synchronizing pulse, to the root-mean-square voltage of the noise. Provides
a measure and indication of signal quality.
SA
system amplifier.
SAI, SAII, SAIII
system amplifier I, system amplifier II,
system amplifier III.
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