Radiotron, I don't have a Panasonic DVR, but TVGOS analog via TWC disappeared for me last week. My sad story of Manhattan South TWC Cablecard-TVGOS:
My setup is a CableCard supplied by Time Warner Cable (TWC), Southern Manhattan, in a Toshiba HD DLP TV, 52hm94, Firmware Version 1.6.5, purchased in 2004 (after many, but, alas, not all of the early adapter problems). My TV Guide on Screen (TVGOS) can only use the analog version via the vertical blanking interval (VBI). I live near the World Trade Center site so there are too many tall buildings around me to get any useful over the air (OTA) TV signals from NY transmitters in midtown Manhattan. I switched my cable service from RCN (direct plug in of cable to the HD digital ready TV) to TWC with a CableCard in early 2009 when RCN started scrambling ESPN, etc and seemed then to be even more clueless regarding CableCards than TWC NYC. In early 2010, after a year of time-wasting, nonsense baloney for me and others, TWC NYC FINALLLY got CableCards properly addressed or something at their central location so their CableCard users no longer had lots of channels disappearing every other week or so (now usually only a few disappear occasionally) and thus helping the TVGOS to update regularly. (Fortunately, I had the sense to never get any of their premium services, just DTV Value, which includes HD, so I didn't pay extra for additional disappearing channels).
A couple of months ago, as TWC NYC was sending out letters to CableCard users that Switched Digital Video (SDV) was coming, my TVGOS stopped updating. The CableCard had been tuning to all my digital channels and one analog channel, the analog version of the TV Guide listings crawl channel, which I thought was their elegant solution for analog TVGOS users. (I could tell it was analog because it was the only one for which the sound shrieked when output optically to my amplifier, and I could tell it was carrying the TVGOS data since I would often discover, when I turned on the TV, that the tuner had changed itself to that channel.) After TWC NYC moved the TV Guide listings crawl channel (to make way for another cooking channel), there was now only a digital version and no analog one. When, after lots and lots of calls, I got someone at TWC NYC to understand that, unlike the inexplicably disappearance of almost all my channels a week earlier (which equally inexplicably re-appeared a few days later after that), the ending of the analog channel with the TVGOS data had nothing to do with SDV (their original story). It turned out that they had had the CableCards tune to the analog version for a year and a half, not as an intentional solution, but a Mistake, which they had now Corrected and would Not change back. (I should have know better, I guess. It was TWC NYC. On the other hand, per the Rovi site, RCN in NY doesn't send out Any analog channel with the TVGOS data inserted so TWC NYC does deserve some credit for that.)
I have now split my incoming cable signal with a powered, ultra-low loss splitter.
One to Antenna I (which goes through the CableCard for descrambling) and the other to Antenna 2. When I watch TV (and want to be able to hit a TVGOS listing to get to a channel to watch - my wife never does that anyway) or plan to record something overnight (on my Toshiba Symbio HD hard drive, which needs the output of the tuner), I go to TVGOS setup to tell it I get cable service on Antenna 1. When I have finished watching/recording, I change it to tell the TVGOS setup that I get cable service on Antenna 2 so it can get overnight the analog version of the TV Guide listings crawl channel (which is still transmitted on TWC cable analog Channel 18) and update the TVGOS listings. Last week, I went to the initial setup for the TV and deleted all the channels for Antenna 2 except channel 18 to guarantee that the TVGOS could find it. (Also, quite bizarrely, my sound (but not the video) for a few extended periods used to disappear on all digital channels once or twice a week (requiring a turn off, unplug, replug to get them back), and I suspect it was the searching for the channel that had the TVGOS data (and the odd things it might run into from TWC NYC) that would confuse the audio section of the tuner.)
The current procedure is a bit of a pain, but it has been working quite OK, and I want to hang in there with my current setup, using the Symbio for HD recording (which, unfortunately, Requires the TVGOS to at least find a time signal) as long as I can. The TWC letter to their CableCard users indicates (by omission) that their SDV tuning adapters Never work with Any TV's with built-in a CableCard slot, just separate recorders such as Moxi and TiVo. For now, I will live for now w/o the relatively few, mostly uninteresting, non-premium SDV channels that I will not get (since, fortunately, I don't pay for any channels beyond DTV Value). For the future, I will probably avoid TWC's low-grade DVR and buy a Moxi or TiVo AFTER the current TWC NYC buggy and poorly explained implementation of SDV is finally sorted out. (As they say, you can tell the pioneers because they're the ones with arrows in their backs.) Also, the FCC is considering requiring changes to the admittedly quite lame-o, current SDV tuning adapters.
At any rate, I will probably have to do something by mid 2012 when the FCC's three year mandate that cable companies must enable subscribers to get the analog version of the local OTA's without paying extra for a box will be reviewed (and, I assume, dropped) since I further assume TWC NYC would drop the analog version of the TV Guide listings crawl channel at the same time.
My jerry rigged solution stopped working last week as explained in the below main body of an email I sent to Rovi on Sunday (no reply to date. I also sent a variant on the message via email to TWCNYC whose response was that I should call the regular customer service telephone number, i.e., Drop dead).
Rovi Support, I have been receiving TVGOS updated listings for the last several months via a direct connection to my TV from the output of TWC, Southern Manhattan. My TV is a Toshiba 52hm94 so it needs the analog version, which it has been getting via TWC analog Channel 18. Per your site a few minutes ago, both TWCs in Manhattan are, in theory, still sending out both the analog and digital version of TVGOS programming updates. However, last Sunday ,the TVGOS on my TV stopped updating and on Wednesday the TVGOS was No Data for anything (except the time of day) and no ads. It remains that way after a couple of zip code 00000, then back to 10013. When I tuned to it on Wednesday and Saturday, the analog version of Channel 18 still had the TVGuide logo, but No scroll of the current shows, no information about what is going on., etc, It shows only the interviews, movies, etc, that usually occupy the top 2/3 of the picture, now occupying the whole picture. It's exactly the same for TWC digital 157 (which I can see via a TWC box in another room.) Today, Sunday, it is even odder in that TWC 18 and 157 both have a Channel J, which seems to have nothing to do with TVGuide. I assume that the TVGOS data has disappeared from the vertical blanking interval of TWC 18 for the same reason that the scroll has disappeared, which must be, at minimum, some kind of TWC Manhattan system wide problem