Equipment In Specification Knowledge Check

10 Questions | By Duncanclayton211 | Last updated: Mar 20, 2022 | Total Attempts: 76

Questions

Settings

Create your own Quiz

Questions and Answers

1.

The minimum SNR for QAM 256 is:
2.

The minimum upstream power level is ___dBmv
3.

What is the maximum and minimum digital signal power levels at the input of a device for QAM 256 is? (Select one answer)
- A.
  
  +8 to +2 dBmv
- B.
  
  +6 to -4 dBmv
- C.
  
  +10 to -6dBmv
- D.
  
  +8 to -2 dBmv
- E.
  
  +6 to +2 dBmv
4.

What is the maximum permissible slope between two QAM 256 frequencies at the input to equipment?
- A.
  
  +/-4dB
- B.
  
  +/-8dB
- C.
  
  +/-3dB
- D.
  
  +/-10dB
- E.
  
  +/- 6dB
- F.
  
  +/- 0dB
5.

The maximum upstream (return path) power level is? (Select one answer)
- A.
  
  55dBmv
- B.
  
  54dBmv
- C.
  
  51dBmv
- D.
  
  53dBmv
- E.
  
  52dBmv
- F.
  
  49dBmv
6.

What is the maximum and minimum signal input levels at a device for QAM 64?
- A.
  
  +3 to -3dBmv
- B.
  
  +55 to - 11dBmv
- C.
  
  +10 to -6dBmv
- D.
  
  +5 to - 11dBmv
- E.
  
  +6 to -8dBmv
- F.
  
  +4 to - 10dBmv
7.

What is the minimum acceptable SNR for a QAM 64 frequency?
8.

Calculate the slope between the following QAM 256 frequencies.Remember to indicate if the slope is positive or negative by using a - or + sign before the number. Your High digital frequency is measured at +2dBmv and your Low frequency at +6dBmv
9.

Calculate the slope between these two QAM 256 frequencies. Remember to put a - or + in-front of your answer to indicate if the slope is negative or positive.The high digital frequency level is -5dBmv and the low digital frequency is +2dBmv
10.
Calculate the expected signal loss using the following information.
- Length of drop cable = 180 metres
- Frequency loss per 10metres = 2dB