3 REPLIES
Expert

Re: Tuning adapter failure in 75082

What you should try is a 2 way splitter with the modem on one port, the tuning adapter on the otjher with the Tivo on the TA's output port instead of the load resistor.

That will provide 3.5 dB better signal to the TA

 

Observer

Re: Tuning adapter failure in 75082

I have these devices attached to a three-way splitter:

 -3.5 --> sb6183 cable modem

 -7.0 --> motorola tuning adapter (RF out terminated)

 -7.0 --> Tivo

 

This confguration has worked for at least five years. The tuning adapter also does not connect if I bypass the splitter entirely and feed the tuning adapter only.

 

The last time my tuning adapter stopped connecting was March 2015, and a replacement tuning adapter also refused to connect. Then it magically started working the next week. I'm not willing to waste another trip for an ineffective equipment swap.

 

I can't pull signal levels from the TA becuase its diagnostic menus are not available until after it connects. The signal levels on the cable modem attached to the -3.5 port looks like this:

 

Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectedUncorrectables
1LockedQAM2561771000000 Hz0.8 dBmV40.2 dB00
2LockedQAM2562777000000 Hz0.8 dBmV40.2 dB00
3LockedQAM2563783000000 Hz0.6 dBmV40.2 dB00
4LockedQAM2564789000000 Hz0.8 dBmV40.2 dB00
5LockedQAM2565795000000 Hz0.1 dBmV40.2 dB00
6LockedQAM2566801000000 Hz0.3 dBmV40.2 dB00
7LockedQAM2567807000000 Hz0.3 dBmV40.2 dB00
8LockedQAM2568813000000 Hz0.2 dBmV40.2 dB00
9LockedQAM2569819000000 Hz0.0 dBmV40.2 dB00
10LockedQAM25610825000000 Hz-0.1 dBmV40.0 dB00
11LockedQAM25611831000000 Hz-0.4 dBmV40.0 dB00
12LockedQAM25612837000000 Hz-0.4 dBmV40.0 dB00
13LockedQAM25613843000000 Hz-1.0 dBmV39.4 dB00
14LockedQAM25614849000000 Hz-0.8 dBmV39.8 dB00
15LockedQAM25615855000000 Hz-1.2 dBmV39.7 dB00
16LockedQAM25616861000000 Hz-1.7 dBmV39.5 dB00

 

 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA555120 Ksym/sec30600000 Hz38.5 dBmV
2LockedTDMA532560 Ksym/sec19400000 Hz36.5 dBmV
3LockedATDMA545120 Ksym/sec24200000 Hz36.8 dBmV
4LockedATDMA562560 Ksym/sec37000000 Hz40.0 dBmV



 

Current System Time: Thu Jun 18 22:45:58 2015

Expert

Re: Tuning adapter failure in 75082

Yes, Get another tuning adapter.

 

 

 but first, copy and paste your modems signal level page and describe where it is splitterwise from the line that feeds the TA

Then in whatever it's connected to, grab an in band channel level and the out of band levels from the TA.

 

Observer

Tuning adapter failure in 75082

I was having difficulty tuning SDV channels with my Tivo Roamio plus Motorola tuning adapter combination last night around midnight Central in Richardson, TX, 75082. I called TWC, who was broadcasting a prerecorded message about "missing channels" which usually means some sort of SDV problem.

 

The system-wide problem was supposedly cleared by morning, but my tuning adapter continues to flash its amber light, which means it is not connecting and I cannot tune any SDV channels.

 

My video service outage is right at 24 hours now. Phone support says the only option is an onsite tech visit eight days from now, which I find ridiculous since the problem is mostly likely on the system side.

 

 

Aren't tuning adapters just simple DOCSIS 2 cable modems? My SB6183 modem shows good signal levels, approximately +0 dbmv downstream and 39 dbmv upstream--don't tuning adapters operate in the same bands? This is probably not a signal issue.

 

I find it hard to believe that TWC allows devices on its network that have zero capability for remote support.

 

I have an issue open via the dslreports TWC direct support forum but received zero acknowledgement from @TWC_Help on twitter. Is there any way to get a resolution faster than eight days?