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 [Exclusive] የትኛውም LNB ነው ምርጥ 17 K, 15 K, 13 K

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PostSubject: [Exclusive] የትኛውም LNB ነው ምርጥ 17 K, 15 K, 13 K   Thu Sep 08, 2016 1:46 am

You see on the LNB top , N.F. reading
is given there.
The Noise Figures (N.F) refers the
quality of the first stage input amplifier
transistor. The quality is measured in
units called Noise Temperature, Noise
Figure or Noise Factor. Both Noise
Figure and Noise Factor may be
converted into Noise Temperature. The
lowest Noise Temperature is better. So
an LNB with Noise Temperature = 13 K
is as good as one with 17 K. (K means
degrees Kelvin)
So the noise figure refers “ HOW
MUCH NOISES ARE MIXED WITH
SIGNAL”.
So in practical,
17 K - Normal
15 K – Better
13 K - Best.
Advantages of 13 K LNB .
1. Noises are reduced.
2. Picture freezing can be avoided.
3. Useful for low signal / out of
coverage satellites.
But cost wise 13 K LNB is higher than
the other LNB.
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[Exclusive] የትኛውም LNB ነው ምርጥ 17 K, 15 K, 13 K
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