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NCT-4
Line Tech Flash Cards
29
Engineering
Graduate
04/27/2015

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Cards

Term
SLM
Definition
Signal Level Meter
Term
MER
Definition
Modulation Error Ratio
Term
Impedence
Definition
Resistance of a Circuit
Term
Laser
Definition
Light Amplification by simulated emission of radiation 1310-1550nm
Term
0 dBmv(rf) is equal to ____mv.(light)
Definition
1 mV
Term
What type of signal is Digital.
Definition
A Discontinuous Signal
Term
What type of signal is Analog.
Definition
A Continuous Signal
Term
What compression is Digital TV (HD TV)
Definition
MPEG 2
Term
The process by which these specific values are converted into a data or bit system.
Definition
Encoding
Term
Modulation Types for
Video...
Sound...
Color...
Definition
Video...Amplitude Modulation
Sound...Frequency Modulation
Color...Phase Modulation
Term
Is the assigning of a specific value to each of the samples.
Definition
Quantization
Term
Is the measuring of the analog signal at specific intervals. (More Samples=More Accuracy)
Definition
Sampling
Term
The 2 most common Modulation Schemes are?
Definition
QAM & QPSK
Term
Buad
Definition
Bits per second
Term
Bit
Definition
A BIT is a 1 or 0.
Term
Beats
Definition
The unwanted sum and/or difference in frequencies resulting from mixing of 2 or more signals.
Term
The unwanted sum and/or difference in frequencies resulting from mixing of 2 or more signals.
Definition
Beats
Term
CODEC
Definition
Compression and Decompression
Term
Coax Thermal Noise
Definition
59.2 dBmv
Term
The amount of noise in an amp
Definition
NF Noise Figure
Term
The difference between the peak carrier level measured in dBmv
Definition
C/N Carrier to Noise
Term
Amplifiers add what to the system
Definition
Noise
Term
Every time a cascade doubles it changes the C/N by how many db
Definition
3.0 dBmv
Term
MPEG
Definition
Moving Picture Experts Group
Term
Caused in one channel by the carrier from another transmitter operating on the same channel
Definition
Co-Channel Interferance
Term
If your input of an amp equals NF then the C/N level will be
Definition
59.2 dBmv
Term
Un-designed change in the waveform of a signal
Definition
Distortions
Term
3 Types of Digital Distortions
Definition
Spectral Re-Growth
Multipath and Reflections
Phase Noise
Term
A figure of merit derived mathematically from the number and severity of signal leaks in a cable system
Definition
CLI
Cable Leakage Index
64 or less figure of merit
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