Cisco Cisco 1 GHz GainMaker Amplifier 安装指南
Glossary
109
L
LE
line extender.
LED
light-emitting diode. An electronic device that lights up when electricity passes through it.
M
Mbps
megabits per second. A unit of measure representing a rate of one million bits (megabits) per
second.
second.
MHz
megahertz. A unit of measure representing one million cycles per second; measures
bandwidth.
bandwidth.
N
N-cm
Newton centimeter
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)
lever at a point on the lever that is one meter from the pivot point. (1 Nm = 0.737561 ft-lb)
P
PWB
printed wiring board.
R
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.
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
signal, including synchronizing pulse, to the root-mean-square voltage of the noise. Provides