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<blockquote data-quote="mm1352000" data-source="post: 1041419" data-attributes="member: 82144"><p>Hello again Kyle</p><p></p><p></p><p>Great! <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>Yes, that's right.</p><p></p><p></p><p>That is a very reasonable question. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p>The answer: sometimes the cable company will push the information for all their services ("channels") on one or all frequencies. This enables a tuner to tune 1 frequency to find all available services rather than tuning 150+ frequencies to find the services available on each frequency. The first approach might take 30 seconds while the second might take 30 minutes.</p><p></p><p>Notes for the first approach:</p><ul> <li data-xf-list-type="ul">the cable provider has to push the frequency details with each service for it to work</li> <li data-xf-list-type="ul">a tuner may be tuned to a given frequency and receive info for services which are carried on different frequencies</li> </ul><p>Notes for the second approach:</p><ul> <li data-xf-list-type="ul">the tuner only receives info for services which are carried on the currently tuned frequency, and therefore service frequency always equals tuned frequency</li> </ul><p>MediaPortal supports both approaches. At present MP isn't smart enough to determinel which approach the cable provider is using so it is forced to trust the information received from the cable provider. As it happens, your provider uses approach two and pushes some bogus info. Hence the problem.</p><p></p><p>I have an idea for how to work around this problem. It will just take some time to implement.</p><p></p><p></p><p>The TVService.log file. Here is an example:</p><p></p><p></p><p>The tuner tuned to 229262 kHz; the channels were saved with frequency 577250 kHz.</p><p>For you, the correct frequency is the tuned frequency; the sometimes-incorrect frequency is the saved frequency.</p><p></p><p></p><p>Heh, yes - no argument from me there! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p>For what its worth, here is my understanding...</p><p>For US ATSC and cable, a physical channel is a 6 MHz "slot" at a given frequency. In the above example, physical channel is 25. Range is from 228000 kHz to 234000 kHz.</p><p>The sub-channels are the services carried in a physical channel. In the above example, that is WITI-DT (25-2), WITI-DT (25-62) and WTMJ-DT (25-1). The bracketed numbers are QAM channel numbers (format: <physical channel>-<service ID>).</p><p>Virtual channel numbers are the numbers that you press on your remote control when you want to tune a channel. ATSC has two-part channel numbers. In the above example there are two WITI-DT's - 6-1 and 6-2 - and WTMJ-DT which is 4-1.</p><p></p><p></p><p>Happy to help. <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>mm</p></blockquote><p></p>
[QUOTE="mm1352000, post: 1041419, member: 82144"] Hello again Kyle Great! :) Yes, that's right. That is a very reasonable question. :) The answer: sometimes the cable company will push the information for all their services ("channels") on one or all frequencies. This enables a tuner to tune 1 frequency to find all available services rather than tuning 150+ frequencies to find the services available on each frequency. The first approach might take 30 seconds while the second might take 30 minutes. Notes for the first approach: [LIST] [*]the cable provider has to push the frequency details with each service for it to work [*]a tuner may be tuned to a given frequency and receive info for services which are carried on different frequencies [/LIST] Notes for the second approach: [LIST] [*]the tuner only receives info for services which are carried on the currently tuned frequency, and therefore service frequency always equals tuned frequency [/LIST] MediaPortal supports both approaches. At present MP isn't smart enough to determinel which approach the cable provider is using so it is forced to trust the information received from the cable provider. As it happens, your provider uses approach two and pushes some bogus info. Hence the problem. I have an idea for how to work around this problem. It will just take some time to implement. The TVService.log file. Here is an example: The tuner tuned to 229262 kHz; the channels were saved with frequency 577250 kHz. For you, the correct frequency is the tuned frequency; the sometimes-incorrect frequency is the saved frequency. Heh, yes - no argument from me there! :) For what its worth, here is my understanding... For US ATSC and cable, a physical channel is a 6 MHz "slot" at a given frequency. In the above example, physical channel is 25. Range is from 228000 kHz to 234000 kHz. The sub-channels are the services carried in a physical channel. In the above example, that is WITI-DT (25-2), WITI-DT (25-62) and WTMJ-DT (25-1). The bracketed numbers are QAM channel numbers (format: <physical channel>-<service ID>). Virtual channel numbers are the numbers that you press on your remote control when you want to tune a channel. ATSC has two-part channel numbers. In the above example there are two WITI-DT's - 6-1 and 6-2 - and WTMJ-DT which is 4-1. Happy to help. :) mm [/QUOTE]
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