I'm trying to track down the source of intermittent disconnects/no connection type issues. Mostly happens from wireless devices where you are browsing a web site fine, then page won't load, then it loads on second try. I have recently upgraded to a Netgear Orbi router and the symptoms did not change.
|Acquire Downstream Channel||699000000 Hz||Locked|
|1||Locked||QAM256||21||699000000 Hz||-2.2 dBmV||39.8 dB||2921||0|
|2||Locked||QAM256||3||591000000 Hz||-3.3 dBmV||39.6 dB||4693||0|
|3||Locked||QAM256||4||597000000 Hz||-2.7 dBmV||39.7 dB||4738||0|
|4||Locked||QAM256||5||603000000 Hz||-2.0 dBmV||39.9 dB||4925||0|
|5||Locked||QAM256||6||609000000 Hz||-2.4 dBmV||39.9 dB||4268||0|
|6||Locked||QAM256||7||615000000 Hz||-2.5 dBmV||39.8 dB||4158||0|
|7||Locked||QAM256||8||621000000 Hz||-1.5 dBmV||40.0 dB||3276||0|
|8||Locked||QAM256||9||627000000 Hz||-1.8 dBmV||40.0 dB||3686||0|
|9||Locked||QAM256||10||633000000 Hz||-2.5 dBmV||39.9 dB||3229||0|
|10||Locked||QAM256||11||639000000 Hz||-1.8 dBmV||39.9 dB||3532||0|
|11||Locked||QAM256||13||651000000 Hz||-2.3 dBmV||40.0 dB||3020||0|
|12||Locked||QAM256||17||675000000 Hz||-2.9 dBmV||39.6 dB||3729||0|
|13||Locked||QAM256||18||681000000 Hz||-2.0 dBmV||39.8 dB||3910||0|
|14||Locked||QAM256||19||687000000 Hz||-2.2 dBmV||39.7 dB||3983||0|
|15||Locked||QAM256||23||711000000 Hz||-2.5 dBmV||39.7 dB||2345||0|
|16||Locked||QAM256||25||723000000 Hz||-2.0 dBmV||39.7 dB||3009||0|
|1||Locked||ATDMA||16||5120 Ksym/sec||37000000 Hz||40.8 dBmV|
|2||Locked||TDMA||13||2560 Ksym/sec||19400000 Hz||36.5 dBmV|
|3||Locked||ATDMA||14||5120 Ksym/sec||24200000 Hz||39.0 dBmV|
|4||Locked||ATDMA||15||5120 Ksym/sec||30600000 Hz||39.5 dBmV|
Modem Error Log:
The exterior splitter port formerly used for TV must have a 75 ohm termination installed in place of the now-unused cable to the wall outlet for the TV connection, or you can mount the terminator right on the wall outlet plate.
Next, you need to let the equipment run for about 48 hours after reseting the modem power bedfore you can treust the error counts. You will soon start to see uncorrrectible errors appear, but don't panic. Numbers up to about a thousand are OK while the modem levels stabilize. Counts higher than that indicate problems on the cable network.
Another tip: If your router and computer have settings that allow you to turn off IPv6, doing so will often reduce ping times on hop 2 and beyond. You don't need to have IPv6 active on your home LAN to access remote sites with an IPv6 address over your Spectrum internet connection.
Thanks for the tips! I actually had some 75ohm terminators on hand so I actually stuck one on the splitter where the line to the TV was. Would it be better to just elimnate the splitter entirely though?
IPv6 was already off on my router but I went ahead and disabled it on any devices that allowed for it.
Shouid I power cycle my modem after making these changes or just let it adjust on its own?
Yes, you could remove the splitter completely and replace it with an inline coupler, UNLESS the splitter also has the protective ground wire connected to it. They normally install a separate line grounding block on the outside of the wall where the cable enters the building. Do not disconnect the ground wire or remove the device to which it is connected.
Removing the splitter should imcrease receive signal levels by 3 to 4 dB on all DS channels and drop the transmit upstream levels by a similar amount. No need to power-cycle the modem, the levels will quickly readjust.
I was able to remove the splitter from the run since there was a seperate grounding block in place already. Power numbers adjusted exactly as you predicted:
There doesn't seem to be much improvement with the original symptoms even after cleaning up my cable connection. Here is a recent pingplotter capture showing one of the first Spectrum nodes in my area having issues. This node always seems to be showing frequent slowdowns and packet loss. I was really hoping the issues were on my end since it seems like node issues are a black hole in terms of getting a resolution.
Big jump in the uncorrectables in my modem log (they were at 37 yesterday, so this all just happened in the last 24 hours), just when I start to say everything looks good on my end. Nothing new in the event logs. Thoughts?