Questions for today's presentation

Tuesday, September 15, 2009
Questions for Sudhanshu's team
1.How exactly attenuation is reduced by using coaxial cables?

Question for mohammad reza's team
1.What is debug protocol implementation?

From cc11
Shreyas.D
Sharath.s
Vijay.S.S
Prabhakara.S.H

2 comments:

Unknown said...

i think your means is what is protocol debugger , protocol debugger software are totally different with software analyzer But as i know in protocol debugger we can handling of protocol errors with help of edit the packet and modify the data and send it to destination .

shivam said...

a1.Attenuation is defined as loss of signal over distance. Attenuation is directly proportional to
frequency; the higher the frequency the higher the attenuation. Attenuation is also proportional
to the size of the conductor; the larger the conductor the lower the attenuation. Another factor
which affects attenuation is the Velocity of Propagation of the cable.
Attenuation is the driving factor when determining how far a signal will travel effectively via a coaxial
cable. Attenuation is measured or expressed in decibels (dB) per distance (normally 100 ft or 100
meters). Since attenuation is directly proportional to frequency, we normally show attenuation for the
frequencies of interest (i.e. for CATV 5, 10, 20, 55, … 450, 550, 650, 750, 1000 Mhz).
When considering the proper coaxial cable for a CATV signal distribution, the attenuation is a critical
component which leads us to conductor and therefore cable size. A Series 59 cable uses a 20 AWG
center conductor. A Series 11 cable is constructed with a 14 AWG conductor. If you recall we stated
that the larger the conductor the less attenuation. A 14 AWG is twice the size of a 20 AWG and
therefore has approximately half the attenuation. Therefore a signal (at the same frequency and
power) can be transmitted twice the distance via a Series 11 cable as a Series 59 cable.
Coaxial cables are used today in numerous applications for the transmission of data, video and
connection to antennas for wireless applications. They are run inside virtually every enterprise
space such as an entire campus, a single building, a single-family or mixeduse residence, and
even in automobiles. Coaxial cable are used to connect enterprise spaces within a single
community or subdivision. Since coaxial cables are used everywhere, it is important to choose
the right one.

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