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Exam (elaborations)

SPECTRUM FIELD TECH 2024 QUESTIONS AND ANSWERS

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SPECTRUM FIELD TECH 2024 QUESTIONS AND ANSWERS

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  • September 1, 2024
  • 12
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • SPECTRUM FIELD TECH
  • SPECTRUM FIELD TECH
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Teacher101
SPECTRUM FIELD TECH

Higher BER can be caused by? - ANSWERS-Ingress

Distortion

Noise

Interference

Hum

Reflection



Spaced errors - ANSWERS-Errors that are spread out because of noise



Burst errors - ANSWERS-Errors that are grouped together because of intermittent
problems such as ingress or loose connectors



FEC - ANSWERS-Generates and introduces additional bits as data is transmitted



Uncorrectable FEC errors are caused by: - ANSWERS-Impulsive noise or ingress
interference

Loose or intermittent connections

A faulty modem

, MER - ANSWERS-A measurement used to quantify the performance of
communications system transmitting a digital signal



Industry acceptable MER values for QPSK - ANSWERS-~24dB



Industry acceptable MER values for 64-QAM - ANSWERS-~27dB



Industry acceptable MER values for 256-QAM - ANSWERS-~31dB



Voltage - ANSWERS-Measurement of the force or pressure that electrons to move



1v equals what? - ANSWERS-1 current of 1 ampere through a resistance of one
ohm



Current are measured in what? - ANSWERS-Amperes



Resistance - ANSWERS-The opposition a material offers to the flow of current



Power - ANSWERS-The rate at which work is done. Measured in watts



1 watt= what? - ANSWERS-1V X 1AMP

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