What is NIT (Network Information Table) SEARCH?
When searching channels using this method, the receiver will first Auto tune the TP's in the receiver's database. Then, it will search for any NIT information, which may be broadcast by the satellite service provider, from the signal available and subsequently tune those TP's which are not included in the receiver database.
Hi Sadoun,
If I may, I would like to add to your description above with a description of my own understanding of the NIT search that I got through bits and pieces of reading over the years. I won't say that my interpretation is totally accurate, but it seems to explain the NIT fairly well for my own satisfaction.
For example: Satellite provider "XYZ Sat" owns or leases many satellites around the world. They have a big fleet of sats and provide many signals to multiple locations. For certain regions, more than one satellite is viewable to "XYZ's" customers.
If their customers were to scan one specific XYZ sat and one specific transponder, they may have access to "XYZ's" NIT (Network Information Table). Within that transmitted NIT, XYZ maintains an updated list of all their satellite fleet and all the active transponders on those satellites. Therefore, if your receiver has the authority (privileage) and capabilities to disseminate the information, you need only perform a scan of that one TP that transmits the NIT and your receiver will acquire the entire list of their satellite fleet and all the transponders and possibly even the current channel list for everything.
So, rather than moving your dish to scan XYZ's other satellites, you scan once on one satellite and obtain the information for ALL the other XYZ satellites from that NIT.
I view the NIT as a downloadable satellite/transponder/channel list from the satellite itself. Is this roughly your idea of what the NIT is supposed to be and do as well? This is the best explanation that I can muster, but as I say, I don't know if I am correct in my assumptions.
RADAR
