Hmmm .... your reference to 10.6 and 11.6 in the context of your question is a little confusing (typo?).
Surely you mean 10.7 GHz (10700 MHz) and 11.3 GHz (11300 MHz)?
1/. An LNB with a range of 11.7 GHz (11700 MHz) to 12.75 GHz (12750MHz) has a local oscillator frequency of 10.7 GHz.
2/. An LNB with a range of 12.25 GHz to 12.75 GHz has a local oscillator frequency of 11.3 GHz.
3/. Obviously the first LNB covers a greater range (11.7 GHz - 12.75 GHz) than the second (12.25 - 12.75).
So-called Universal LNB's with a range of 10.7 GHz to 12.75 GHz have two local oscillators with frequencies of 9.75 GHZ and 10.6 GHz and employ 22 KHz switching to select one of the two local oscillators.
I hope that this has answered your question.
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