# Equipment In Specification Knowledge Check

10 Questions | Total Attempts: 63  Settings  • 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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