My area seems to get pretty weak and unstable signal
I am 60 miles out and although the terrain is pretty flat here
there are two metropolitan areas between me and the towers
I am trying to understand the relationship between NM and Pwr
from the reference
PWR is the predicted signal power
and
NM is the predicted Noise Margin
My strongest station at this time is showing a
NM of 32 and a PWR of -58
the weakest station that I can sometimes pickup is showing
NM of 15 and a PWR of -75
Being so far out and in the middle of nowhere and everything at the same time I am surrounded by 4-5 markets and I have a number of CoChannels
I would guess that they also reduce or cancel out each other but the stations
above are not CoChanneled and they are from one market.
From reading the reference and I don't know if this is correct
I must have a NM at the TV of over 0 to receive the station
and the PWR is the strength of the signal to my home from the tower?
so I think the PWR is more where I am getting confused but I am not sure.
If I want to pickup a station that has
NM of 15 and a PWR of -75
How do I understand what the Antenna and Amp should be theoretically rated at?
Figuring I have a 10db rated uhf Antenna
connected a RCA 22db uhf /16db vhf preamp
then to 50' of coax
to a 8 way distribution amp with 3-4db gain out
and runs of 30' to each tv.
guessing the Distribution Amp should cancel out most wire and splitter loss.
from what I understand now
between the 10db antenna and 22db of amp
a station of NM of 15 means
I should be good to go to watch that station
But the PWR of -75 I am not sure how I account for that.
the -75 seems to suggest that I probably shouldn't be able to get that signal very well if at all
Since PWR is so low here
with a conventional antenna I guess the most i can expect is about 15db gain at best
which would compensate to bring the -75pwr up to -60 ?
still not real great
I am not sure ... anyway thanks
my tvfool because I know you're gonna ask for it.
http://www.tvfool.com/?option=com_wr...8e034e42ebcb68