Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old June 28th 15, 11:48 AM posted to sci.electronics.design,rec.radio.amateur.antenna
JW JW is offline
external usenet poster
 
First recorded activity by RadioBanter: Feb 2011
Posts: 9
Default Antenna Amplifier Noise Figure

On Sat, 27 Jun 2015 12:50:39 -0400 krw wrote in Message
id: :

On Sat, 27 Jun 2015 15:49:50 +0100, Jeff wrote:


For a particular NF the effect on the output s/n ratio is always the
same regardless of the actual input s/n, until you get to the point
where the signal vanishes in the noise, but even then it still holds
true but you just can't see it.

The signal will go up by the gain of the amplifier, and the noise will
go up by the sum of *power* of the input noise times the gain and the
noise power of the calculated from the NF times the gain.

The noise powers being in watts calculated from the NF; in a 1Hz
Bandwidth by convention. So its dB above kTB converted to watts if you
are working with NF in dB.

So for a particular NF the added noise is always the same, therefore the
SNRin/SNRout holds, and is a standard definition of NF (not in dB).

Jeff

https://en.wikipedia.org/wiki/DBm

Look at the last four entries in the table.


..and your point is???

...between its shoulders.


....and under his comb-over.
  #2   Report Post  
Old June 28th 15, 04:06 PM posted to sci.electronics.design,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jun 2015
Posts: 27
Default Antenna Amplifier Noise Figure

On Sun, 28 Jun 2015 06:48:13 -0400, JW Gave us:

...and under his comb-over.


Full head of hair here. Sounds like you looked in the mirror,
asswipe.
  #3   Report Post  
Old June 28th 15, 04:36 PM posted to sci.electronics.design,rec.radio.amateur.antenna
krw krw is offline
external usenet poster
 
First recorded activity by RadioBanter: Jun 2015
Posts: 9
Default Antenna Amplifier Noise Figure

On Sun, 28 Jun 2015 11:06:59 -0400, DecadentLinuxUserNumeroUno
wrote:

On Sun, 28 Jun 2015 06:48:13 -0400, JW Gave us:

...and under his comb-over.


Full head of hair here.


That makes complete sense, furball for brains.

Sounds like you looked in the mirror, asswipe.


You're projecting again, Furball.
  #4   Report Post  
Old June 28th 15, 04:55 PM posted to sci.electronics.design,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Nov 2012
Posts: 989
Default Antenna Amplifier Noise Figure

On 6/28/2015 11:36 AM, krw wrote:
On Sun, 28 Jun 2015 11:06:59 -0400, DecadentLinuxUserNumeroUno
wrote:

On Sun, 28 Jun 2015 06:48:13 -0400, JW Gave us:

...and under his comb-over.


Full head of hair here.


That makes complete sense, furball for brains.

Sounds like you looked in the mirror, asswipe.


You're projecting again, Furball.


Can you two find another thread to post your silly insults in? Why
don't you start a new thread all about how much you guys like to bicker?

--

Rick
  #5   Report Post  
Old June 28th 15, 05:04 PM posted to sci.electronics.design,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jun 2015
Posts: 27
Default Antenna Amplifier Noise Figure

On Sun, 28 Jun 2015 11:55:04 -0400, rickman Gave us:

On 6/28/2015 11:36 AM, krw wrote:
On Sun, 28 Jun 2015 11:06:59 -0400, DecadentLinuxUserNumeroUno
wrote:

On Sun, 28 Jun 2015 06:48:13 -0400, JW Gave us:

...and under his comb-over.

Full head of hair here.


That makes complete sense, furball for brains.

Sounds like you looked in the mirror, asswipe.


You're projecting again, Furball.


Can you two find another thread to post your silly insults in? Why
don't you start a new thread all about how much you guys like to bicker?


At least you didn't ****ing blame me this time. That is an
improvement.

Here is another...

http://www.lz1aq.signacor.com/docs/f..._loop_engl.htm


  #6   Report Post  
Old June 28th 15, 05:39 PM posted to sci.electronics.design,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: May 2011
Posts: 550
Default Antenna Amplifier Noise Figure

On 6/28/2015 10:55 AM, rickman wrote:
On 6/28/2015 11:36 AM, krw wrote:
On Sun, 28 Jun 2015 11:06:59 -0400, DecadentLinuxUserNumeroUno
wrote:

On Sun, 28 Jun 2015 06:48:13 -0400, JW Gave us:

...and under his comb-over.

Full head of hair here.


That makes complete sense, furball for brains.

Sounds like you looked in the mirror, asswipe.


You're projecting again, Furball.


Can you two find another thread to post your silly insults in? Why
don't you start a new thread all about how much you guys like to bicker?


It was a nice, informative discussion until those two showed up. Too bad.
  #7   Report Post  
Old June 28th 15, 07:14 PM posted to sci.electronics.design,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jun 2015
Posts: 27
Default Antenna Amplifier Noise Figure

On Sun, 28 Jun 2015 11:39:57 -0500, John S Gave
us:

On 6/28/2015 10:55 AM, rickman wrote:
On 6/28/2015 11:36 AM, krw wrote:
On Sun, 28 Jun 2015 11:06:59 -0400, DecadentLinuxUserNumeroUno
wrote:

On Sun, 28 Jun 2015 06:48:13 -0400, JW Gave us:

...and under his comb-over.

Full head of hair here.

That makes complete sense, furball for brains.

Sounds like you looked in the mirror, asswipe.

You're projecting again, Furball.


Can you two find another thread to post your silly insults in? Why
don't you start a new thread all about how much you guys like to bicker?


It was a nice, informative discussion until those two showed up. Too bad.


Bull****, child. Too bad you are ****ing blind.

The links I gave provided more clues than any of the antenna banter
did.
  #8   Report Post  
Old June 28th 15, 11:31 PM posted to sci.electronics.design,rec.radio.amateur.antenna
krw krw is offline
external usenet poster
 
First recorded activity by RadioBanter: Jun 2015
Posts: 9
Default Antenna Amplifier Noise Figure

On Sun, 28 Jun 2015 11:55:04 -0400, rickman wrote:

On 6/28/2015 11:36 AM, krw wrote:
On Sun, 28 Jun 2015 11:06:59 -0400, DecadentLinuxUserNumeroUno
wrote:

On Sun, 28 Jun 2015 06:48:13 -0400, JW Gave us:

...and under his comb-over.

Full head of hair here.


That makes complete sense, furball for brains.

Sounds like you looked in the mirror, asswipe.


You're projecting again, Furball.


Can you two find another thread to post your silly insults in? Why
don't you start a new thread all about how much you guys like to bicker?


No one is forcing you to read anything either of us write. If you
don't like it, go away.
  #9   Report Post  
Old June 29th 15, 01:17 AM posted to sci.electronics.design,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Oct 2012
Posts: 1,067
Default Antenna Amplifier Noise Figure

On 6/28/2015 11:55 AM, rickman wrote:
On 6/28/2015 11:36 AM, krw wrote:
On Sun, 28 Jun 2015 11:06:59 -0400, DecadentLinuxUserNumeroUno
wrote:

On Sun, 28 Jun 2015 06:48:13 -0400, JW Gave us:

...and under his comb-over.

Full head of hair here.


That makes complete sense, furball for brains.

Sounds like you looked in the mirror, asswipe.


You're projecting again, Furball.


Can you two find another thread to post your silly insults in? Why
don't you start a new thread all about how much you guys like to bicker?

Pot-Kettle-Black

--
==================
Remove the "x" from my email address
Jerry, AI0k

==================
  #10   Report Post  
Old June 29th 15, 03:16 AM posted to sci.electronics.design,rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jun 2015
Posts: 27
Default Antenna Amplifier Noise Figure

On Sun, 28 Jun 2015 20:17:17 -0400, Jerry Stuckle
Gave us:

On 6/28/2015 11:55 AM, rickman wrote:
On 6/28/2015 11:36 AM, krw wrote:
On Sun, 28 Jun 2015 11:06:59 -0400, DecadentLinuxUserNumeroUno
wrote:

On Sun, 28 Jun 2015 06:48:13 -0400, JW Gave us:

...and under his comb-over.

Full head of hair here.

That makes complete sense, furball for brains.

Sounds like you looked in the mirror, asswipe.

You're projecting again, Furball.


Can you two find another thread to post your silly insults in? Why
don't you start a new thread all about how much you guys like to bicker?

Pot-Kettle-Black


Wrong, Stucklett. Rickman has attacked no one.


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Noise figure calculation Jason Antenna 4 February 8th 05 01:03 AM
WTB: HP/Agilent 346A (or B) Noise Source for HP 8970A Noise Figure Meter Carl R. Stevenson Homebrew 0 January 21st 04 04:20 AM
Calculating noise figure from kTo J M Noeding Homebrew 2 September 19th 03 01:00 AM
Calculating noise figure from kTo J M Noeding Homebrew 0 September 18th 03 09:43 PM
Claculating noise figure from kTo J M Noeding Homebrew 0 September 18th 03 09:42 PM


All times are GMT +1. The time now is 09:29 PM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017