Tom Barry wrote: >If your antenna is aimable you may find it works best >not aimed quite dead on for channel 11. ATSC is just >sort of quirky. As I have often stated here, I'm not >very satisfied with 8vsb but, if I put my mind to it, I >can usually manage to get most necessary channels >with a little tinkering. Right, but the antenna is not easily aimable. And NBC 11 is not our local affiliate. And it provides a good test case for marginal reception. First, at night Baltimore NBC 11 is solid, it's during the day that the dropouts occur. Looking at the signal monitor, it hovers around 50 percent to maybe 60 percent, whatever that means. But more interesting, the SNR hovers between 14.1 and maybe 16.7 or so. So not bad at all. This would be a perfect test case for improving the forward error correction, e.g. by more cleverly using the convolutional trellis and separate block Reed Solomon codes. Those SNR numbers, assuming they are accurate, are excellent for now. Even more interesting is that the SD weather multicast on 11-2 is quite solid. Only a very occasional dropout or slight pixellation. I suppose that if more packets per unit time are required for the HD 11-1, and if the corrupted packets are evenly spread out, maybe that's why the SD subchannel appears more solid. Interesting phenomenon. Perhaps you do gain from SD after all, even without changing the RF coding. I played with the EPG. This is a good EPG. It looks much like the grid you see in www.zap2it.com, and it gets populated as you go. Which means, if you have not used the EPG and you press the EPG button in the remote, you will be told to hang in there as it downloads the EPG. It downloads all channels that fit in the screen for a 3 hour time slot. If you then scroll either down or up for more stations, or to the right for more time slots, it asks you to wait a few seconds as it continues to populate the grid. Cool. Once populated, you can scroll back and forth without waiting. Evidently, this is not done when the unit is idle, only when you have it fully powered up. When proper 4th and 5th (and beyond) boxes come out, it will be interesting to see how the reception changes. As of now, though, I have to say this works quite well. If you remember that the Shannon limit for 19.39 Mb/s in 5.38 MHz is 10.47 dB of SNR, we have a lot of good improvement still to achieve. Also, as is, 8-VSB reception is excellent in cases where the equivalent analog is truly bad. For example, the Channel 56 case I mentioned. Bert _________________________________________________________________ Is your PC infected? Get a FREE online computer virus scan from McAfee® Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.