Can someone please explain what the "Network Search" feature does on satellite receivers? It's on most if not all of my FTA satellite receivers, but I never fully understood what exactly it does.
Network Search
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I was being long winded and was still typing while Jim posted the short and sweet answer... Pretty much the same information. Oh well! 
One of the packet types in a DVB stream can include an entry called a Network Information Table (NIT). This should contain information about other transponders and data rates associated with that 'network'. This type of scan reads that table, then goes and looks at those other transponders for additional channels.
As you might be starting to guess, it's not all that useful. Most transponders we watch are the lone transponder for that "network". Furthermore, I find it rare when the table contains accurate data. Usually it seems to be ignored by providers. One exception to this may be on 97W. I think I've seen Globecast set their tables up somewhat reasonably. Try it - create a temporary slot for a test on 97, and enter one of the Globecast transponders, then do a Network Scan. You'll find it gets populated with the other TPs and channels from Globecast.
One of the packet types in a DVB stream can include an entry called a Network Information Table (NIT). This should contain information about other transponders and data rates associated with that 'network'. This type of scan reads that table, then goes and looks at those other transponders for additional channels.
As you might be starting to guess, it's not all that useful. Most transponders we watch are the lone transponder for that "network". Furthermore, I find it rare when the table contains accurate data. Usually it seems to be ignored by providers. One exception to this may be on 97W. I think I've seen Globecast set their tables up somewhat reasonably. Try it - create a temporary slot for a test on 97, and enter one of the Globecast transponders, then do a Network Scan. You'll find it gets populated with the other TPs and channels from Globecast.
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