On Wed, Nov 25, 2009 at 12:52 PM, Dale Pontius <[email protected]> wrote: > I've been using the NTSC side of my HVR-1600s for some time now, and > occasionally play with the ATSC/QAM side, hoping to get it into regular > usage sooner or later. The other day I first did some ATSC scans using > an antenna, and managed to get about what I'd expect for channels, even > watched a sampling of them. Then I hooked to an unused port on my > splitter/amp and did a QAM scan, wondering what Comcast has left > unencrypted. I got a pile of messages : > WARNING: filter timeout pid 0x1ffb > and dvbscan generated 200+ unlabeled entries. > > What does the filter timeout message mean? > Is there anything I can do about it. > > I plan to do more looking at this stuff, but was hoping for a little > more understanding than just mimicking steps I've googled. > > Last time I tried this stuff, I came up with only 1 fully identified > QAM256 channel - QVC. (Oh Boy!!!) > > Any suggestions, pointers, etc would be welcome.
Hi Dale, The ATSC PSIP standard provides things like channel identification information and program guide data on MPEG PID 0x1FFB. The channel scanner is looking for that data so that it can provide a reasonable name for the channel in channels.conf (for example "CBS-HD"). When you see that filter timeout message, it typically means that the tuner achieved a signal lock on the target frequency, but the sender was not providing any PSIP info. This is really common for QAM, since many of the cable companies are not forwarding the channel information even for the "must carry channels" (in violation of the FCC specification, I might add). It can also mean the channel is encrypted (requiring a cablecard), and in that case the cable company is not required to provide PSIP info. Unlabeled entries are cases where a channel was detected but either the channel was encrypted or did not have any PSIP info (but admittedly all the channel scanners do a lousy job of telling you which it was). Cheers, Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
