On May 8, 2009 08:04:11 pm Andy Walls wrote: > On Fri, 2009-05-08 at 16:56 -0400, Nick Nobody wrote: > > Hello, > > > > I just got a HVR1600 and am trying to build a channels.conf file with all > > the channels that I get using my TV (it has a built-in ATSC tuner). > > Are you using the cx18, mxl5005s and s5h1409 drivers that came with your > distribution or the latest v4l-dvb repository drivers? > > If not the latest, you should try those first. See the cx18 page on > ivtvdriver.org for instructions on getting the latest drivers. > > http://www.ivtvdriver.org/index.php/Cx18 > > > I use the following command to scan for channels (on mythbuntu 9.04): > > > > scan /usr/share/dvb/atsc/us-ATSC-center-frequencies-8VSB > > > > It manages to find every single channel except for WFFF-TV (aka FOX44). > > My television shows that it has a strong signal strength and is actually > > better than some other channels. > > According to the FCC, WFFF-TV's digital station is on UHF channel 43. > How does WFFF's analog station look on UHF channel 44? Any snow, > ghosting, or interference lines? > > If so, that indicates poor reception from that transmitter. If so, also > please review: > > http://www.ivtvdriver.org/index.php/Howto:Improve_signal_quality > > > Is there something I can do help the scan program > > find this channel? > > Well, if it helps, the center freq for an ATSC-8VSB channel on UHF > channel 43 is 647.028615 MHz. > > Maybe you could make up a manual entry in channels.conf, azap to it, and > then use femon or dvbtraffic to see if you can get a lock and see the > PIDs in use. > > Where I'm at, PIDs 0x31 (49) and 0x34 (52) are usually in use for the > primary video and audio program. > > > I noticed that it's one of the few (or only) channel that > > broadcasts in 720p instead of 1080i, but I doubt that makes much of a > > difference... > > It shouldn't make a difference. > > Regards, > Andy > > > Thanks, > > > > nick >
Hi Andy, Thanks for the quick and detailed response. It seems that you're right about it being a signal strength issue because as soon as the sun went down I was able to (unreliably) find the channel with a scan. I've gone through all of your recommendations and here's what I've come up with: Using the latest drivers makes it much harder for me to get a lock, I had better results with version 1.0.4 that comes with the vanilla 2.6.29 kernel (I'm using the prepackaged 2.6.29 ubuntu kernel: 2.6.29-02062902). 44 is just snow for me, but I'm assuming that's because their analog transmitter is off-air. All the wiring is new, in fact there's only one splice (union) from the antenna down to the capture card. As mentioned above, I was able to get a lock tonight and was able to watch the channel for a good 25min but then it just crapped out. Is there a way to increase the sensitivity of the card? My television (which has a much longer length of wire going to it) has a perfect picture day or night; I don't understand why it works while the HVR1600 doesn't :S Thanks for your help, nick _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
