Quote:
|
So, based on your post, and studying other links/docs, I think I want to achieve a NM of 0 at least (preferably 5 or 10 NM, to give myself buffer, otherwise I'd probably have frustrating viewing experience having signal drop below threshold quite often due to random events).
|
Correct, you want a Fade Margin of at least 10 dB because OTA signals constantly vary in strength.
Quote:
|
Antennas comes with gain that will add to the NM (says here that antenna is the only one that I can really add to NM
|
Yes, antenna gain can be directly added to make the NM more positive. You can also add the amp gain but must subtract the amp Noise Figure which reduces the signal SNR. You might wonder why would you want to do that if it reduces the SNR of the signal coming from the antenna? The answer is that a preamp reduces the total System Noise Figure making the distribution losses minimal and making it possible to receive signals that are about 5 dB weaker because it makes the tuner noise figure irrelevant.