Originally posted by tbb1226
How can you see whether PSIP is there or not? I think the DirecTV receiver(s) I have used overwrite anything that might come with the OTA broadcast with the APG data. Is this so, or am I misunderstanding what PSIP is? [/b]
The short answer, all the DTV stations in the Detroit market are sending
out PSIP except channel 39. The only DirecTV receiver I've seen that
uses the OTA PSIP is the RCA DTC-100.
The long answer, PSIP (Program & System Information Protocol) consists
of several data tables. The most commonly transmitted OTA are:
MGT - Master Guide Table - This tells the receiver what other tables
are being transmitted and how to find them.
VCT - Virtual Channel Table - This defines which virtual channel number
to associate with which subchannel and analog channel. In other words,
it tells the reciever that 58.2 should be known as 2.1.
RRT - Rating Region Table - It carries the definitions of the TV ratings
system(s) in use.
STT - System Time Table - It carries the time of day, date and DST info.
EIT - Event Information Table - There can be 4 to 128 instances of this
table. Each instance carries the basic EPG info for 3 hours of programming.
This is where the program title, duration, rating, etc. are transmitted.
ETT - Extended Text Table - There can be up to 128 instances of this
table. These are associated with the EITs and carry the extended
Hope that helps, rather than confuses!