Blind vs. Auto

[bel71281]

c/p thanks to GH

Blind scan uses no information from the satellite TP list in your receiver, it scans the LNB Band, 950-2150mhz and looks for TPs, it then uses the LNB Freq you entered to save what it finds as TP Freqs in your memory.
So say it finds a TP in the LNB band at 974mhz it would add the LNB Freq YOU entered to that number, if you used the correct LNB freq like 11250 then you would get
11250 + 974 = TP Freq 12224
So 12224 would be saved to the memory.

Now sats like 61.5,82,91,110,119,129,148 have TP setups that FTAs can't quite ID everytime, so blind scanning on these sats can be hit and miss.



Auto/regular scan uses the TP Freqs in your FTAs memory for the sat you are scanning.
It gets the first TP freq, like 12224 then subtracts the LNB Freq, YOU have entered, from the TP freq to get the LNB Band Freq, so
12224 - 11250 = 974
It then looks at 974mhz and scans for channels at that freq.

It then gets the next TP Freq in your list and does it again, it does this until all TP Freqs in the list have been scaned.


As you can see both of these methods depend on YOU entering in the correct LNB Freq for the LNB you are using.
Sats don't have LNB Frequencies, they have TP Freqs, but for the TP Freq to have any meaning the LNB Freq must be correct.
All LNBs will have an L.O. number on them, that number is the LNB Freq.,
L.O. 11.25 = 11250
L.O. 10.6 = 10600
L.O. 10.75 = 10750

If you have no TP Freqs for a sat then blind scan is ok, it takes awhile since it is building a TP list from scratch and then also has to scan the channels on each TP found.

If you have a current TP List for the sat then auto/regular scan is better, takes less time and no reason to rebuild a TP List you already have.

If a TP has been changed or added on a sat it is easier to "add a TP" then scan that 1 TP than it is to start from scratch.
__________________