| Author |
Message |
    
john kim
New member
Username: Wubbzy
Post Number: 1
Registered: 03-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, March 13, 2009 - 01:34 pm: | 
|
I used to get NBC on 39-1, weather on 39-2, and a sports channel (mostly skiing & winter sports) on 39-3. This morning when I turned on the TV + converter box and changed channels to 39-1, it automatically went to 40-2, and NBC was broadcasting there. Now it's afternoon and when I turned on the TV + conv box again, NBC is back to 39-1. What's going on here? Is it that the broadcaster itself gets to display what channel to show, and there was some software glitch over at NBC? |
DonRB
Advanced Member
Username: Donrb
Post Number: 3115
Registered: 08-2003
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, March 13, 2009 - 04:04 pm: |
|
Sounds like KNSD had a PSIP problem earlier and now fixed it. The PSIP info is responsible in providing the virtual channel numbers like 39-1, etc since the physical channel used by KNSD-DT is 40. Without PSIP the box just reports the physical number with sub-channel as you saw.
(Message edited by DonRB on March 13, 2009) |
Dtv814
Advanced Member
Username: Dtv814
Post Number: 257
Registered: 01-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, March 13, 2009 - 04:18 pm: |
|
KNSD-DT is actually broadcast on channel 40. (this includes the subchannels like 40-1, -2 and so on) However, So as not to confuse the folks, KNSD-DT uses a technology called PSIP, as mentioned above, to make the channel look as if it is broadcasting on channel 39, again including 39-1, -2, etc, which is the channel that everyone is used to when it comes to finding NBC 7/39 over the air. So, if the PSIP fails, you will see KNSD on its real channel location channel 40 and that looks like what has happened here. |
Héctor Servin
Intermediate Member
Username: Nightwalker
Post Number: 44
Registered: 09-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, March 14, 2009 - 09:36 pm: |
|
Mmm... Now that you mention about this technology, i´m wondering why Tv Azteca digitals are displaying the current physical channel on all DTV receivers. XHJK-DT 28-1 (on physical ch. 28) and XHTIT-DT 29-1 (on physical ch 29).
I remembered when i bought my HDTV tuner in 2006. Tv azteca digital channels were showed in their virtual analogs XHTIT-DT 21-1, and XHJK-DT 27-1. And that has changed to the physical ch. several months ago up to date. |
|
General over-the-air (OTA)