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Flashcards in Brian H sticky note deck Deck (23)
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1

The presence of any distortion components that cause an error in digital decoding

amplitude and phase distortion

2

measured between the center conductor and the sheath with the other end shorted

DC Loop Resistance

3

Caused by coherent noise, will cause circular patterns in each cell

Ingress or Spurs

4

Extra bit added to help check if the data being transferred is correct

Parity Bit

5

modulating technique that interweaves multiple conversations based on time

TDMA Time Division Multiple Access

6

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

7

4 air displacement gasses

carbon dioxide
helium
argon
nitrogen

8

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

9

10log (Average symbol power/average error power)

MER (dB)

10

cable loss + passive loss

total loss

11

calculation for expected level

starting level-total loss

12

0 to 12 Hz

Infrasonic

13

Digital carrier RMS/ Noise Floor RMS

C/N

14

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

15

1271nm - 1611nm

CWDM Wavelengths

16

Visible Red Light

390 - 780 nm

17

errored bits vs. total bits per second

BER

18

continuous unwanted signal within the channel pass band that can affect digital decoding

(CI) Carrier to sustained Impairments

19

To be subjected to the action of an electrical discharge

SHOCK

20

To kill by electrical shock

electrocute

21

3 digital distortions you should be concerned with

Spectral regrowth
multipath and reflections
Phase noise

22

Fuzzy circular pattern in each cell will occupy most of the cell

poor CNR

23

Can cause severe reliability problems in digital carriers. Usually due to oscillator instability in processing equipment

Phase Noise

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