Brian H sticky note deck Flashcards
(23 cards)
The presence of any distortion components that cause an error in digital decoding
amplitude and phase distortion
measured between the center conductor and the sheath with the other end shorted
DC Loop Resistance
Caused by coherent noise, will cause circular patterns in each cell
Ingress or Spurs
Extra bit added to help check if the data being transferred is correct
Parity Bit
modulating technique that interweaves multiple conversations based on time
TDMA Time Division Multiple Access
caused by imbalance in the modulators, mixer, or undesirable DC in the transmission system. entire constellation is offset in one direction
Carrier leakage aka constellation offset
4 air displacement gasses
carbon dioxide
helium
argon
nitrogen
circular effect where points in each cell are stretched out perpendicular to a radius line in propertion to the center of the diagram
Phase Shift
10log (Average symbol power/average error power)
MER (dB)
cable loss + passive loss
total loss
calculation for expected level
starting level-total loss
0 to 12 Hz
Infrasonic
Digital carrier RMS/ Noise Floor RMS
C/N
Nyquist’s Rule
in order to obtain an accurate recreation of a signal it must be sampled at a rate of at least twice the highest frequency
1271nm - 1611nm
CWDM Wavelengths
Visible Red Light
390 - 780 nm
errored bits vs. total bits per second
BER
continuous unwanted signal within the channel pass band that can affect digital decoding
(CI) Carrier to sustained Impairments
To be subjected to the action of an electrical discharge
SHOCK
To kill by electrical shock
electrocute
3 digital distortions you should be concerned with
Spectral regrowth
multipath and reflections
Phase noise
Fuzzy circular pattern in each cell will occupy most of the cell
poor CNR
Can cause severe reliability problems in digital carriers. Usually due to oscillator instability in processing equipment
Phase Noise
