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anothervictum's avatar
anothervictum
New Contributor

Cable modem bad or Cox just lazy?

I seem to be having an issue where my ARRIS Surfboard SB6141 modem is struggling with holding a connection on some of its channels...if you look at my signal page you see stuff like this:

Signal Stats (Codewords)Bonding Channel Value
Channel ID 118  113  114  115  116  117  119  120 
Total Unerrored Codewords 126914053  125597364  121985945  125084400  123595998  126911156  126913812  126943504 
Total Correctable Codewords 41  288455  921509  305740  683232  22  67  23 
Total Uncorrectable Codewords 1509  1039334  4028045  1558098  2632242  1539  1469  1477 

The thing is the other numbers for power level and SNR seem okay and when I talk to Cox they say the numbers on their end  look good

DownstreamBonding Channel Value
Channel ID 118  113  114  115  116  117  119  120 
Frequency 939000000 Hz  909000000 Hz  915000000 Hz  921000000 Hz  927000000 Hz  933000000 Hz  945000000 Hz  951000000 Hz 
Signal to Noise Ratio 35 dB  37 dB  37 dB  35 dB  37 dB  37 dB  35 dB  37 dB 
Downstream Modulation QAM256  QAM256  QAM256  QAM256  QAM256  QAM256  QAM256  QAM256 
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
-7 dBmV   -4 dBmV   -5 dBmV   -5 dBmV   -5 dBmV   -5 dBmV   -7 dBmV   -5 dBmV  

UpstreamBonding Channel Value
Channel ID 4  1  2  3 
Frequency 40400000 Hz  24400000 Hz  29200000 Hz  35600000 Hz 
Ranging Service ID 449  449  449  449 
Symbol Rate 2.560 Msym/sec  2.560 Msym/sec  5.120 Msym/sec  5.120 Msym/sec 
Power Level 47 dBmV  47 dBmV  47 dBmV  47 dBmV 
Upstream Modulation [3] 16QAM
[3] 64QAM
 		 [3] 16QAM
[3] 64QAM
 		 [3] 16QAM
[3] 64QAM
 		 [3] 16QAM
[3] 64QAM
 
Ranging Status Success  Success  Success  Success 

Does anyone have any thoughts on this?...Cox says its a bad modem but seems just as likely a bad connector or some worn shielding...

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  • grymwulf's avatar
    grymwulf
    Contributor II

    That does look like a bad signal, can't tell what is triggering it.  I'd try a different cable outlet to see if that helps.  Your power levels and SNR look good, so it's not a poor signal issue.  Could be noise or ingress - one way to check modem as cause, stop by a retail store, pick up a rental modem.  Check it out for a couple of days see if it helps, if it doesn't it's not a modem issue, and they  can't blame your modem when you call in.