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QAM record problem with logs -- HELP please
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<blockquote data-quote="mm1352000" data-source="post: 750440" data-attributes="member: 82144"><p>Hi again cewillis</p><p></p><p></p><p>Fair enough. I don't think you're doing anything wrong, but if this used to work before then something has changed to cause it to start happening. The things that have changed that I can think of can be counted on one hand:</p><p>- tuning details in the DB</p><p>- hybrid card assignments in the DB</p><p>- channel mappings in the DB</p><p>- frequencies of some of your channels</p><p></p><p>Logically the cause of the issue is one of those things.</p><p></p><p></p><p>The logs showed the two scheduled recordings and their interactions very well. However you have done much more testing than that including manual recordings and different combinations of tuners. Without having logs to show what happens when things go right then I had to guess the differences between okay (for example, manually starting the recordings) and bad scenarios are...</p><p></p><p></p><p>Hmm, that makes it very easy for the two tuners to affect eachother with interference when they are both operating. They have to amplify the parts of the signal that they are "interested in".</p><p></p><p></p><p>I don't think so. My understanding is that the differences between standards are not about what the signal contains. More about the gaps between channels or the range of frequencies used. In such a situation it would be really easy to get slightly wrong tuning details. I stumbled across --><a href="http://www.silicondust.com/support/channels/" target="_blank">this</a><-- site a month or so ago. I don't think it is complete, and it doesn't seem to list the QAM standard (could be wrong...), but it is the best information that I've found in one place about USA tuning details...</p><p></p><p></p><p>That is an excellent idea. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p></p><p>It is the tuning environment that makes a frequency difficult to tune or not. The factors are things like whether there is noise/interference on a frequency that is close to the frequency that you want to tune, how strong the signal is... From a practical perspective the things with those kinds of effects are weather, aerial/dish alignment, cable quality, cordless phones, electric fences... sometimes really random things.</p><p></p><p></p><p>Yes it is incredibly puzzling. Logs for manual starts would definitely help - in particular, if you can reproduce a problem with only two channels and show with logs that manual tuning works and a scheduled recording with or without overlap does not then that could go a long way to figuring this thing out...</p><p></p><p></p><p>My turn to apologise - *sorry*... unreservedly. :sorry:</p><p>I didn't mean to cause offense and I hope none was taken.</p><p></p><p></p><p>No, and that is a fair point. There does come a point when you need to repost, but it is not uncommon for threads to take a week to get answered. I don't know about other people but I'm constantly trawling the areas of the forums where questions come up that I'm often able to help with, and I definitely go back over the last couple of weeks. I also monitor the MP Live section when I'm available and search for unanswered threads. In your case I probably missed the live post and because you added information I missed you in the unanswered threads section too. Hence it is a little unusual for me to have missed your first thread...</p></blockquote><p></p>
[QUOTE="mm1352000, post: 750440, member: 82144"] Hi again cewillis Fair enough. I don't think you're doing anything wrong, but if this used to work before then something has changed to cause it to start happening. The things that have changed that I can think of can be counted on one hand: - tuning details in the DB - hybrid card assignments in the DB - channel mappings in the DB - frequencies of some of your channels Logically the cause of the issue is one of those things. The logs showed the two scheduled recordings and their interactions very well. However you have done much more testing than that including manual recordings and different combinations of tuners. Without having logs to show what happens when things go right then I had to guess the differences between okay (for example, manually starting the recordings) and bad scenarios are... Hmm, that makes it very easy for the two tuners to affect eachother with interference when they are both operating. They have to amplify the parts of the signal that they are "interested in". I don't think so. My understanding is that the differences between standards are not about what the signal contains. More about the gaps between channels or the range of frequencies used. In such a situation it would be really easy to get slightly wrong tuning details. I stumbled across -->[URL="http://www.silicondust.com/support/channels/"]this[/URL]<-- site a month or so ago. I don't think it is complete, and it doesn't seem to list the QAM standard (could be wrong...), but it is the best information that I've found in one place about USA tuning details... That is an excellent idea. :) It is the tuning environment that makes a frequency difficult to tune or not. The factors are things like whether there is noise/interference on a frequency that is close to the frequency that you want to tune, how strong the signal is... From a practical perspective the things with those kinds of effects are weather, aerial/dish alignment, cable quality, cordless phones, electric fences... sometimes really random things. Yes it is incredibly puzzling. Logs for manual starts would definitely help - in particular, if you can reproduce a problem with only two channels and show with logs that manual tuning works and a scheduled recording with or without overlap does not then that could go a long way to figuring this thing out... My turn to apologise - *sorry*... unreservedly. :sorry: I didn't mean to cause offense and I hope none was taken. No, and that is a fair point. There does come a point when you need to repost, but it is not uncommon for threads to take a week to get answered. I don't know about other people but I'm constantly trawling the areas of the forums where questions come up that I'm often able to help with, and I definitely go back over the last couple of weeks. I also monitor the MP Live section when I'm available and search for unanswered threads. In your case I probably missed the live post and because you added information I missed you in the unanswered threads section too. Hence it is a little unusual for me to have missed your first thread... [/QUOTE]
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