Shared Flashcard Set

Details

NCT4
Network Tech 4 Module 3
20
Communication
Professional
08/12/2011

Additional Communication Flashcards

 


 

Cards

Term
Signal level meter
Definition
frequencey selective reciever capable of tuning in a desired frequencey
Term
RMS
Definition
measures AC with true readings
Term
TDR
Definition
Time Domain Reflectometer
Term
The velocity of an electrical signal on a cable as it relates to the speed of light in a vacuum
Definition
Velocity of Propagation
Term
The resistance of a circuit to alternating current
Definition
Impedance
Term
Before you connect you TDR to a cable you must
Definition
Check for voltage
Term
Dead Zone
Definition
Time lags needs for the pulse width to enter into the cable
Term
Short Pulse dead zone
Definition
6feet
Term
Long pulse dead zone
Definition
1500 feet
Term
properly terminated cable
Definition
shows a straight line for the entire lenght of the trace
Term
Inductive clamp
Definition
used when connecting test leads to the cable is not possible
Term
bucking power
Definition
sending AC from 2 different power supplies
Term
shunt
Definition
low resistance connection between two points that forms an alternative path for a portion of current
Term
Amp/ Hybrid #1 in a mini bridger
Definition
takes care of any noise problems
Term
amp/hybrid #2 in a minibridger
Definition
takes care of distortions
Term
IPPV, VOD, internet, telephony
Definition
requier 2 way communitcation
Term
IPPV
Definition
Impulse pay per view
Term
CPD
Definition
when forward bleeds onto return @ 6MGHz intervals
Term
defenition of an OUTAGE
Definition
when 2 or more customers have poor or no picture
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