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Search: Posts Made By: mmbridges
Forum: Reception Devices 6-Dec-2013, 2:55 AM
Replies: 7
Views: 11,209
Posted By mmbridges
Hi GroundUrMast, It was not obvious to me....

Hi GroundUrMast,

It was not obvious to me. However, I have seen the quality your posts and what is obvious to me is your superior knowledge and expertise in the subject matter.

I am new to...
Forum: Reception Devices 4-Dec-2013, 2:48 AM
Replies: 7
Views: 11,209
Posted By mmbridges
So it looks like Frii's formula is what I was...

So it looks like Frii's formula is what I was looking for. See

http://en.wikipedia.org/wiki/Noise_figure

I believe this is the formula behind the various online cascaded noise figure...
Forum: Reception Devices 3-Dec-2013, 12:40 AM
Replies: 7
Views: 11,209
Posted By mmbridges
Missing Details

Thanks for the reply Gmast. I have seen this thread. In particular:

Scenario 3 (rooftop antenna followed by pre-amp)

indicates

(Note that his scenario assumes that the gain of the pre-amp...
Forum: Reception Devices 2-Dec-2013, 9:07 PM
Replies: 7
Views: 11,209
Posted By mmbridges
Noise Figure Accounting

I am trying to understand how the addition of a low noise figure (NF) preamp can improve the overall system NF.

I have a Zenith DTT-901 Set Top Box (STB) that I cannot find the NF for so it so...
Showing results 1 to 4 of 4

 

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