Cable Forum - View Single Post - Is Downstream Power Level: 0.3 dBmV too Low?

Traduk · 08-03-2008, 14:00

I should have put optimally between -2.5 and +2.5 and with a caveat that it is based on fairly old information.

There is no doubt that most modems will operate perfectly way outside of those ranges but +11's or +12's are entering a range where questions need asking. My Ambit 200 was showing levels (downstream) in the high 11's but the status page was inaccurate compared with the engineers meter. His reading was +14.5 and was rapidly corrected with an attenuator.

Correcting high power readings is a simple and fast fix but pointless unless parameters are entering a fault zone and difficulties are evident.

08-03-2008, 14:00	#6
Traduk Inactive Join Date: May 2004 Posts: 312	Re: Is Downstream Power Level: 0.3 dBmV too Low? I should have put optimally between -2.5 and +2.5 and with a caveat that it is based on fairly old information. There is no doubt that most modems will operate perfectly way outside of those ranges but +11's or +12's are entering a range where questions need asking. My Ambit 200 was showing levels (downstream) in the high 11's but the status page was inaccurate compared with the engineers meter. His reading was +14.5 and was rapidly corrected with an attenuator. Correcting high power readings is a simple and fast fix but pointless unless parameters are entering a fault zone and difficulties are evident.