Originally Posted by GE AVS
The KZCO-LD license was applied for on 7/6/2011 and was granted on 7/25/2011.
On some TVs, KZCO RF17 shows up as channel 17, on others as channel 7 (thus two V7s will display) - it depends on the software processing of the PSIP data by the TV. It was a topic of discussion last summer among the Denver televison stations engineering community. Of course, RF17 is the successor to the old analog RF27 Azteca America service which is now on V7-2 on both RF7/V7 and RF17/V7.
I am happy to hear there was concern here. In the Minnesota Twin Cities they have they 2 cases where 2 transmitters are sharing Virtual channel numbers.
As I understand it, in the Denver case, KZCO may not technically be a repeater, but effectively it is. I presume it carries exactly the same data content. Therefore, it does not matter which transmitter a tuner locks to, as long as the signal is adequate, there is no difference in available programming. I presume the benefit of this situation is that people with UHF only antennas, can receive receive KMGH, if they are in range of the lower power transmitter. With my antenna system, the signal seemed to be adequate, here in Louisville, but I now have skipped the extra entries in my tuner table.
In the Twin Cities, the transmitters broadcast different sub-channels. This has caused problems for some equipment. The Philips DVDRs (3575 and 3576) do find both transmitters during the scan and do associate both with the shared Virtual Channel number, but they only check the lower transmitter channel (which was found first during the scan) when trying to do a scheduled recording. If the desired sub-channel is on the lower frequency transmitter, the program gets recorded. If it is on the higher frequency transmitter, a blank screen gets recorded. While the programmers of the Philips units, might have handled the situation better, I am not shocked that they didn't. They were not based in the US, so they had to look to the standards, and it may not have been obvious that a broadcaster would do what they did. Personally, I would not have anticipated that a broadcaster would do what the Twin Cities stations did. The only known reason PBS used a single Virtual Channel for its 2 different transmitters, was so they could market them both under the Channel 2 "BRAND". That, marketing decision, seemed to more important than the problem some viewers would experience in viewing their programming. By the way, there is a work-around for those who are tech savy. They can delete the 2 transmitter Virtual channel from the channel list, and then do the scheduled recording using physical channel numbers(as long as the Physical Channels are not in use as a Virtual Channels by some other transmitter), but that is beyond the understanding of a lot of viewers. Using the work-around does mean that they can no longer use channel up and down to reach the station, or tune to the station using the Virtual Channel number. Also, if they do not implement the work-around, since the lower Physical Channel carries the higher sub-channels, when stepping up or down through the sub-channels, they are out of order.