Originally Posted by paco1986
One thing I am noticing is that the call letters of these two channels are now gone. That is, instead of the TV displaying "XEWT-DT" and "XHUAA-DT" (like it did before), it now just displays "HD". Any ideas what this could mean (if anything)?
Yeah, only one thing: I´m afraid that both transmitters are having PSIP problems and can´t display it´s call letters and virtual channels.
I´ve checked on my HDTV tuner box and directly mark ch. 22 from my control and, when the signal was locked, it change it´s virtual channel from 57-1 to 22-1 and it doesn´t display it´s call letters. The same happened to XEWT-DT, my HDTV box displays virtual ch. 32-1 and no call letters.
Then, i checked my bedroom HDTV set to ch 57-1 and it didn´t display any signal. So, i decided to re-scan (i can´t mark the physical ch. as i can do on my HDTV tuner box) and now i can get this channel. This set also marks vitrual channel 22-1 for XHUAA-DT without it´s call letters, but for XEWT-DT it marks virtual channel 12-1 and it has the letters HD for it´s call signal.
Definetly there´s something wrong with their PSIP on their transmitters. A PSIP is some device that marks information about virtual channels and call letters to be displayed in every digital or HDTV tuner set for everyone who get it´s signals. This is the reason for marking of the virtual channels to be displayed like it´s broadcasting in their analog channel.
I don´t know why Tv Azteca displays their physical channels as their virtual ones. I remember back in 2006 that both channels had it´s analog virtual channels 21-1 for ch. 29, and 27-1 for ch. 28.
Channel 57-2 was a subchannel of XHUAA (displaying XHUAA-2), broadcasting the same programming of it´s main ch. but, in it´s analog signal, it was being broadcasted since several weeks before it turned off.