Transcript PowerPoint Presentation - David Elwell`s Webpage

Causes of Transmission
Flaws
Created by:
David Elwell
Dorian Glassberg
Alley Hennigan
Noise
Electromagnetic Interference (EMI)
Radiofrequency Interference (RFI)
• Specific type of
EMI involving
radio waves
– Narrowband
– Broadband
Cross Talk
• Alien Crosstalk - Unwanted signal coupling
from one balanced twisted-pair component,
channel, or permanent link to another.
– NEXT: near end cross talk
Attenuation
• Definition:
– The extent to which a
signal has weakened
after traveling a given
distance.
• Example:
– Voice
Attenuation
• There are different
technologies used to boost
analog and digital signals.
– Amplifier (Analog) – an
electronic device that
increases the voltage, or
strength, of the signal.
– Repeater (Digital) – a device
that regenerates a digital
signal.
Behringer Analog Guitar Amp
Cisco FastHub 400 10/100
Analog - No Noise
Analog - Noise
Attenuation - Analog
– When an analog signal is amplified, the original
message becomes hard to decipher because of
the noise.
Regeneration
• Definition:
– When a digital signal is retransmitted in it’s
original form, without the noise that might have
accumulated previously.
Regeneration
10101010101
10101010101
Latency
• Definition:
– The delay between
the transmission of
a signal and its
receipt.
Round Trip Time