Spectrum Field Technician 1 Test Question with Correct Answers 2023/2024 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. 1 / 2
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.What is Ingress? - Correct Answer Crap coming into our system.What does DOCSIS do? - Correct Answer Permits high-bandwidth data transfer to a cable TV system.
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