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Walker2011

New Contributor

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4 Messages

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Lost signal issues

Hey there,  hoping to get some assistance here.  I have been having issues with the modem itself dropping out.  Tonight, I wanted to try something out, so I hooked up the modem outside to eliminate my house wiring which is older and questionable at best.  

I don't know enough about this stuff to look at the below numbers to know if this is any good or bad.  This is coming from my Motorola Surfboard 6120, if i recall the model correctly.

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Kirk_engel

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2 Messages

You aren't the only one scroll through the posts here and many other people are having problems and they dont have an answer for us

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ChrisL

Former Moderator

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7.1K Messages

Those actually do look like good signal levels in the screen shot you posted.  Ideally the receive levels should be within -10 to +10 and the transmits 35 to 50.

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Walker2011

New Contributor

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4 Messages

Hey Chris, thanks for the reply.  You are refering to the signal levels in dBmV, correct? Are those the primary metric by which you judge a connection?

How does the SNR factor in to the equation, where should those values be?

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Walker2011

New Contributor

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4 Messages

Another update, can you offer any insight into these messages from the modem logs?

Mar 13 2014 18:26:15

6-Notice

I401.0

TLV-11 - unrecognized OID;CM-MAC=

Mar 13 2014 18:26:15

5-Warning

Z00.0

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=

Jan 01 1970 00:00:28

5-Warning

D04.1

ToD request sent - No Response received;CM-MAC=

Jan 01 1970 00:00:13

6-Notice

N/A

Cable Modem Reboot due to power reset ;CM-MAC=

Jan 01 1970 00:00:17

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=

Jan 01 1970 00:00:13

6-Notice

N/A

Cable Modem Reboot due to power reset ;CM-MAC=

Mar 13 2014 18:18:27

6-Notice

I401.0

TLV-11 - unrecognized OID;CM-MAC=

Mar 13 2014 18:18:27

5-Warning

Z00.0

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=

Jan 01 1970 00:00:25

5-Warning

D04.1

ToD request sent - No Response received;CM-MAC=

Jan 01 1970 00:00:13

6-Notice

N/A

Cable Modem Reboot due to power reset ;CM-MAC=

Mar 13 2014 18:17:48

6-Notice

I401.0

TLV-11 - unrecognized OID;CM-MAC=

Mar 13 2014 18:17:48

5-Warning

Z00.0

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=3

Jan 01 1970 00:00:25

5-Warning

D04.1

ToD request sent - No Response received;CM-MAC=

Jan 01 1970 00:00:13

6-Notice

N/A

Cable Modem Reboot due to power reset ;CM-MAC=

Jan 01 1970 00:00:30

5-Warning

D04.1

ToD request sent - No Response received;CM-MAC=

Jan 01 1970 00:00:19

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=;

Jan 01 1970 00:00:13

6-Notice

N/A

Cable Modem Reboot due to power reset ;CM-MAC=

Mar 13 2014 18:14:38

6-Notice

I401.0

TLV-11 - unrecognized OID;CM-MAC=

Mar 13 2014 18:14:38

5-Warning

Z00.0

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=

Jan 01 1970 00:00:26

5-Warning

D04.1

ToD request sent - No Response received;CM-MAC=

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Accepted Solution

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ChrisL

Former Moderator

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7.1K Messages

Those numbers I described outline the power levels for each signal which we consider to be within specification.  SNR or signal to noise ratio describes the ratio of good signal relative to noise interference.  35 is what we consider to be the minimum, lower numbers indicate interference coming from somewhere.  The MIMO events in the logs suggest the modem is experiencing some problems finding the bonded channels although when I look at the modem all is well so that may just be a non-persistent issue.

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Walker2011

New Contributor

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4 Messages

Thanks, it seems to have cleared up now, but to be honest I haven't the foggiest idea what changed.  Same cables, same connections, just all the sudden it became stable. *knock on wood*

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