JTRockville
Data Ho
Premium,MVM
join:2002-01-28
Rockville, MD
clubs:
 ·LINGO
 ·Sprint Mobile Broa..
 ·surpasshosting
 ·Verizon FIOS
| reply to Ken Walsh
Re: Modem or Signal Strength
said by Ken Walsh:
After reading the FAQ on this site I checked the status of the modem and everything looked good but the downstream power level was at -19 dBmV. I believe it should be in the range of +3 and –5 dBmv according to the FAQ.
Downstream powerlevel should be between -15 dBmV and +15 dBmV. But either way, yours is out of spec. Even more important: your modem keeps losing sync!!
There may be more clues in your logs. Can we get a peek?
»192.168.100.1/logs.html
Any splitters on the coax between where the cable comes to the house and your modem? |
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walsh44
join:2003-05-29
Attleboro, MA
| Yes, there are two splitters in the line before the cable modem. It has been that way since Roadrunner was installed years ago. Attached is my log info.
Thanks |
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JTRockville
Data Ho
Premium,MVM
join:2002-01-28
Rockville, MD
clubs:
·LINGO
·Sprint Mobile Broa..
·surpasshosting
·Verizon FIOS
| Welcome to the Comcast Forum
According to the timestamp in your logs, your modem became operational at 6pm tonight? Hmmm...
You're having trouble acquiring an upstream signal. When you got sync, your upstream powerlevel was 54. When you posted your signals, it was 51. What is it now?
I've never even seen that "RR Abort" error before, but it can't be good. said by walsh44  modem event logs:
030529181559 7-Information I503.0 Cable Modem is OPERATIONAL
030529181559 7-Information F502.1 Bridge Forwarding Enabled.
030529181559 7-Information F502.3 Bridge Learning Enabled.
030529181559 7-Information B0.0 Baseline Privacy
030529181558 7-Information I500.0 Registration Completed
030529181558 7-Information I0.0 REG-RSP Registration Response
030529181558 7-Information I0.0 REG-REQ Registration Request
030529181558 7-Information D509.0 Retrieved TFTP Config File SUCCESS
030529181558 7-Information D507.0 Retrieved Time....... SUCCESS
************ 7-Information D511.0 Retrieved DHCP .......... SUCCESS
************ 5-Warning D520.2 DHCP Attempt# 1 BkOff: 5s Tot DSC:1 OFF:1 REQ:1 ACK:1
************ 7-Information D0.0 DHCP CM Net Configuration download and Time of Day
************ 7-Information T500.0 Acquired Upstream .......... SUCCESS
************ 8-Debug T503.1 Acquire US with status OK, powerLevel 54, tempSid 275
************ 8-Debug T505.0 Acquired Upstream with status OK
************ 7-Information T501.0 Acquired Downstream (693000000 Hz)........SUCCESS
************ 8-Debug T509.0 Acquired DS with status OK, DS Freq 693000000, US Id 2
************ 8-Debug T509.0 Acquired DS with status NO FEC lock, DS Freq 121756000, US Id 0
(hunt snipped)
************ 8-Debug T509.0 Acquired DS with status NO FEC lock, DS Freq 115755700, US Id 0
************ 7-Information H501.2 HFC: Shutting Downstream Down
************ 7-Information H501.1 HFC: Shutting Upstream Down
************ 8-Debug T503.1 Acquire US with status RR ABORT, powerLevel 0, tempSid 0
************ 7-Information T501.0 Acquired Downstream (693000000 Hz)........SUCCESS
************ 8-Debug T509.0 Acquired DS with status OK, DS Freq 693000000, US Id 2
************ 8-Debug T509.0 Acquired DS with status NO FEC lock, DS Freq 109755400, US Id 0
(hunt snipped)
************ 8-Debug T509.0 Acquired DS with status NO FEC lock, DS Freq 499774900, US Id 0
************ 7-Information H501.2 HFC: Shutting Downstream Down
************ 7-Information H501.1 HFC: Shutting Upstream Down
************ 8-Debug T503.1 Acquire US with status RR ABORT, powerLevel 0, tempSid 0
************ 7-Information T501.0 Acquired Downstream (693000000 Hz)........SUCCESS
************ 8-Debug T509.0 Acquired DS with status OK DS Freq 693000000, US Id 2
************ 8-Debug T509.0 Acquired DS with status NO FEC lock, DS Freq 123000000, US Id 0
(hunt snipped)
Event Log has reached maximum size. Older log entries are lost.
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walsh44
join:2003-05-29
Attleboro, MA |  My current upstream power level is 45. |
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JTRockville
Data Ho
Premium,MVM
join:2002-01-28
Rockville, MD
clubs: | Somehow, I think it's NOT the modem. That's wacky upstream signal behavior. Generally, signals will vary a bit but not like that.
Do you own or rent?
Did your downstream powerlevel or SNR change at all? |
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Qumahlin
Never Enough Time
Premium,MVM
join:2001-10-05
united state
| reply to JTRockville
said by JTRockville :
Welcome to the Comcast Forum
According to the timestamp in your logs, your modem became operational at 6pm tonight? Hmmm...
You're having trouble acquiring an upstream signal. When you got sync, your upstream powerlevel was 54. When you posted your signals, it was 51. What is it now?
I've never even seen that "RR Abort" error before, but it can't be good.
When a modem is trying to lock onto upstream what it does is it keeps increasing it's power level one by one until it achieves lock. This is why if you goto the modems signal page as it is booting and keep hitting refresh you will see the upstream power level rise.
RR abort occurs when the modem is trying to boot and it reaches 58db without acheiving lock. It can't go any higher so it aborts its search and drops the US back to 0 to start again
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Forum Posts:2800 |
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walsh44
join:2003-05-29
Attleboro, MA | Would an amplifier help me with my downstream power level? It is ranging from –13 to –19, depending on the time of the day. |
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briankelly9
Premium
join:2002-09-11
| I think amping that up wouldnt do anything. Your -19 for a reason somethings wrong somewhere. Are they 2 way splitters or a 3 way to a 4 way or something ? try figuring a way to have it just go thru one splitter just for a night and then do all your tests and see the difference. do you have rg6 cable to the modem or rg59 cable ?
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»briankellycable.com |
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