Spectrum Field Technician 1 Test correctly answered already passed 2023
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Course
Field tech
Institution
Field Tech
Spectrum Field Technician 1 Test correctly answered already passed 2023Decibel (dB) - correct answer Relative # of signal gain or loss through a device or cable.
Decibel millivolt (dBmV) - correct answer Absolute # of signal strength.
Foreign voltage detector (FVD) - correct answer Detects un...
Spectrum Field Technician 1 Test correctly answered already passed 2023
Decibel (dB) - correct answer Relative # of signal gain or loss through a device or cable.
Decibel millivolt (dBmV) - correct answer Absolute # of signal strength.
Foreign voltage detector (FVD) - correct answer Detects unwanted voltage on cables/strands; test on plastics too.
Data Over Cable Service Interface Specification (DOCSIS) - correct answer The international standard for adding high-bandwidth data to an existing cable system.
What does SAFE stand for? - correct answer Stop. Assess. Focus. Eliminate.
What does NCP stand for? - correct answer Next. Channel. Pointer.
What does SLM stand for? - correct answer Signal. Level. Meter.
What is a signal level meter? - correct answer Tool used to run multiple tests involving signal level, MER, BER and noise level.
What does CNR stand for? - correct answer Carrier to Noise Ratio.
What is the purpose of CNR? - correct answer Comparing level of desired signal to level of background noise.
What is Hum modulation? - correct answer The distortion of both cable video and audio. How can you identify video hum? - correct answer Visually seeing single (60Hz) or double (120Hz) horizontal bars rolling slowly up from bottom to top of television.
How can you identify audio hum? - correct answer By physically hearing a buzzing sound.
what does BER stand for and what does it do? - correct answer Bit. Error. Ratio. Overall measure of data quality of the received bit stream.
Consequences of BER (2 things). - correct answer 1.) Video: picture fails
2.) Data: loss of dial tone
What is the max length of a ground wire? - correct answer 20 feet (want the wire as short as possible).
What causes high BER (3 things)? - correct answer 1.) Ingress: poor connections 2.) Distortion: undesired change in electrical signal 3.) Noise: unwanted disturbance to a desired signal
What is the desired BER level? - correct answer 1.0E-9
What does MER stand for? - correct answer Modulation. Error. Ratio.
How many channels can go into a QAM? - correct answer 8-12.
What do QPSK, 16QAM, 64QAM and 256 QAM have in common? - correct answer They are phase shifted
90 degrees apart.
What is Egress? - correct answer Crap coming out of our system.
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