Equipment In Specification Knowledge Check
10 Questions
| Total Attempts: 63
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
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