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Fox wtic-dt in connecticut

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Old 08-21-2005, 07:32 AM   #1  
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Default Fox wtic-dt in connecticut

Has Fox permanently changed from channel 61.1 to channel 31.3 or is this an experimental thing? I can no longer get Fox on 61.1 but I can on 31.3.
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Old 08-21-2005, 08:49 AM   #2  
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I do think that WTIC-DT is just having problems with their PSIP data stream, as I mentioned earlier: since all of this technology is so new to them, it will take a while for them to figure out what is going on. In the meantime, I suggest rescanning the channels on your tuner to see if that fixed the problem.

On a side note, it's interesting to see that WTXX-DT which comes from the same studios and tower site, NEVER has PSIP problems, and ALWAYS has a perfect HD picture: go figure!
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Old 08-21-2005, 04:45 PM   #3  
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Quote:
Originally Posted by connflash
Has Fox permanently changed from channel 61.1 to channel 31.3 or is this an experimental thing? I can no longer get Fox on 61.1 but I can on 31.3.
Channel 61.1 is a virtual channel, not a real one. WTIC's digital broadcasts are not being broadcast on channel 61 and they never have been. What WTIC is actually broadcasting on channel 61 is their analogue programming which takes up the entire channel 61 bandwidth (752-758 MHz).

WTIC's digital programs are being broadcast on channel 31 (572-578 Mhz) which is the channel that was assigned to WTIC for their digital broadcasts by the FCC a few years ago. No station is simulatneously broadcasting its digital programmimg on the same channel as its analogue broadcasts because it is not possible to do so. (The list of digital channel assignments for every TV station in the USA can be found on the FCC's web site).

When you ran your tuner's channel setup routine, the tuner detected a digital signal on channel 31 and it analyzed the PSIP info in the data steam to set up its own internal channel table which is what you are using when you tune in or change channels. Part of the PSIP info was the VCT (Yirtual Channel Table) which identified what virtual channels to assign to the 1 or more broadcast streams contained in the digital stream being broadcast by WTIC on channel 31. The VCT identified channel 61 as the major channel to use for all broadcast streams and sub-channel numbers for each of those streams. WTIC allocated a sub-channel number of 1 to its HD stream. For the HD stream, your tuner stored the information as channel 61.1 together with the the physical frequency (in the 572-578 Mhz range) to tune in when you select channel 61.1 It also assigned a different sub-channel number under channel 31 for the same data stream (in this case sub-channel 3). In the list of available channels only the 61.1 is shown (but you can tune into 31.3 by keying in the number on your remote).

The problems described in an earlier post concerning WTIC-DT, which appear to have prompted your question, are most likely caused by PSIP errors. One of the stations in my area had similar problems last autumn. If the problem persists you might have to rerun your channel set up routine to correct the problems.
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Old 08-22-2005, 05:51 AM   #4  
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Didn't I just say that?
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Old 08-22-2005, 03:48 PM   #5  
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Quote:
Originally Posted by tigerbangs
Didn't I just say that?
Not really. My post was about virtual channels vs real channels because the original poster does not appear to know the difference.

The last comment was added not only to support your opinion (thanks would be more appropriate than apparent sarcasm, btw) but was also based on actual experience with helping a local station solve a virtually identical problem in my area last year.
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Old 08-23-2005, 04:14 AM   #6  
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Thanks for telling me that I am not very intelligent. That type of verbiage is always well received in my neighborhood. I would suggest that you just stick to the subject and not try to show how intelligent you think you are!!!!!!!
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Old 08-23-2005, 03:50 PM   #7  
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Originally Posted by connflash
Thanks for telling me that I am not very intelligent.
I did not say that you were not intelligent, nor did I mean to imply it. I apologize if it read that way.
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Old 08-24-2005, 05:12 AM   #8  
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I came on a bit strong. I'm sorry for that. By the way, what is the difference between a virtual and a real channel?
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Old 08-26-2005, 08:01 PM   #9  
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The real channel is the channel number that is permanently associated with each 6mhz bandwidth of television in the US. For instance channel 9 is 186-192 MHz.

The virtual channel is usually the channel number of the old analog TV signal from a particular station associated with the digital channel.

With digital TV the channel number is coded into the transmission, not associated by frequency.

For instance, here in Lubbock, TX KCBD has analog channel 11 at frequencies 198-204Mhz, their digital signal is on real channel 9, 186-192Hz, but is assigned virtual channel 11.1, 11.2 and 11.3 for its digital transmissions on the 186-192MHz range.

The channel numbers were arbitrary when they were created in the early 20th century, now we have virtual channels that remap those arbitrary channels depending on channel history. This was done so that stations would appear to not change channels when they actually changed frequencies.

Is everyone thoroughly confused yet.

Last edited by jim5506; 08-26-2005 at 08:05 PM..
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