Cisco GS7000 Installation And Operation Manual page 105

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.
RFI
radio frequency interference.
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.
SM
status monitor.
SMC
status monitoring and control. The process by which the operation, configuration, and
performance of individual elements in a network or system are monitored and controlled
from a central location.
SMIU
status monitor interface unit.
SNMP
simple network management protocol. A protocol that governs network management and the
monitoring of network devices and their functions.
synchronous transmission
A transmission mode in which the sending and receiving terminal equipment are operating
continuously at the same rate and are maintained in a desired phase relationship.
4037424 Rev A
Glossary
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