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Old 01-05-2007, 10:57   #6
XFS03
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Location: East London (ex-C&W)
Services: XL broadband ntl250 modem
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Re: Are My Levels Okay?

Quote:
Originally Posted by Stu038 View Post
On the other hand leave it on as all your doing is shifting your downstream to border line levels...
According to the sticky thread at the top of this forum, the DS levels should be between -6 to +15dBmV. Removing the attenuator will put his power level around 5dBmV above the ideal (+4.5dBmV), which shouldn't affect anything as it is currently about 5dBmV below the ideal.

Quote:
Originally Posted by Stu038 View Post
...although the ideal upstream is 48dBmv, 51dBmv is acceptable...
Again, according to the sticky, the US should be between 28 and 53dBmV, so removing the attenuator should shift it away from the upper limit.

The attenuator was probably fitted while the modulation was still 64QAM. The ideal levels for 256QAM are different.


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