Forums

Antenna Amplifier Noise Figure

Started by rickman June 26, 2015
On Sun, 28 Jun 2015 23:05:40 -0400, Jerry Stuckle
<jstucklex@attglobal.net> Gave us:

>I know what usenet is.
Obviously not. It is capitalized, for starters.
> That doesn't mean that others in other >newsgroups want you.
You obviously cannot read. Remember the part where I told you I do not give a fuck what zero IQ dolts like you think?
> And from the posts I found, it's quite obvious you >are not wanted in a number of newsgroups.
It is obvious that you like wasting your personal time mentally masturbating. You are hilarious to watch lose though.
On Sun, 28 Jun 2015 23:05:40 -0400, Jerry Stuckle
<jstucklex@attglobal.net> Gave us:

>ROFLAMO! Another troll response. >
Still with the decades outdated gang boy retard lingo...
>Now you go running back to your mommy and tell here the mean old guy >spanked your ass.
Oh you have seriously dealt me a blow... NOT! What a sad joke you are.
On Sun, 28 Jun 2015 23:06:57 -0400, Jerry Stuckle
<jstucklex@attglobal.net> Gave us:

>On 6/28/2015 10:55 PM, DecadentLinuxUserNumeroUno wrote: >> On Sun, 28 Jun 2015 22:33:42 -0400, Jerry Stuckle >> <jstucklex@attglobal.net> Gave us: >> >>> ================== >>> Remove the "x" from my email address >> >> You mean like this... >> >> jstuckle@attglobal.net >> >> Too pussified to post it? Don't code it in either idiot. >> >> Wake up, little suzzie. Oh that's right... you are as awake as an >> idiot with only two functioning neurons can be. Good job, jackass. >> > >Ah, another troll who needs psychiatric help. Only ones like you would >try to purposely get someone spammed.
An idiot like you needs just that. Have a nice life, thread invading punk.
> >You really need to have your mommy take you to a shrink.
My mother would want me to take a punk like you out to the desert and bury you up to your neck next to an ant hill. Your mother should be in prison for failing to flush the piece of shit you are, the moment the retarded slut shat you. Rickman asked you dumbfucks to stop, and you came back with a PKB insult for him, and you haven't shut the fuck up since. And you call me a troll.
On Sun, 28 Jun 2015 23:10:36 -0400, Jerry Stucklett
<jstucklex@attglobal.net> Gave us:

>I just don't like SPAM.
No, you obviously like BEING the SPAM, as you were asked to leave it OUT of this thread, and you haven't shut the fuck up since.
> However, I at least use an email address which >is easily decoded (read CAPTCHA), unlike the non-existent email address >you use.
There is a reason I do not post my email in Usenet, idiot.
>What are you afraid of - maybe your mommy might find out what crap >you're posting on usenet?
When a punk like you says "crap" it is ok.. When I say it, I get accused of having a fetish. George Carlin has a joke just for retarded dorks like you.
>Give it up
Give what up, you retarded troll fuck?
> - you have zero respectability on usenet
The term is Usenet, idiot.
>. - here or anywhere >else I've found.
The fact that you spend your personal time "hunting things up" on Usenet is an indicator of some serious psychological disorders, child.
> But then that's expected from someone less mature than >a third-grader who needs serious psychiatric help.
You keep referring to psychiatry.. Were you given drugs, Jerome?
> >I hope your mommy gets it for you. You will be much happier.
Nice try, little boy. Your mental age is showing... again.
On Sat, 27 Jun 2015 09:19:23 -0400, DecadentLinuxUserNumeroUno
<DLU1@DecadentLinuxUser.org> wrote:

>On Sat, 27 Jun 2015 13:43:16 +0100, Jeff <jeff@ukra.com> Gave us: > >>On 27/06/2015 13:26, rickman wrote: >>> On 6/27/2015 4:07 AM, Jeff wrote: >>>> On 26/06/2015 13:24, rickman wrote: >>>>> I read this post in an antenna group and I don't get how this guy is >>>>> coming up with a negative noise figure. Looks to me like he is >>>>> calculating the noise figure of a resistor, not the amplifier. Anyone >>>>> care to explain this to me? >>>>> >>>>> The part that seems bogus is this... >>>>> >>>>> > The negative NF is defined as the amplifier noise being less than the >>>>> > increase in noise due to the amplifier gain. >>>>> >>>>> I thought noise figure was NF = SNRin / SNRout >>>>> >>>>> Rick >>>>> >>>> >>>> Both definitions are correct and mean the same thing; a negative NF, >>>> when expressed in dB, would be when the SNRout is less than the SNRin. >>>> However, the big but is that an negative NF is not possible. >>> >>> I don't think both definitions mean the same thing. If the amplifier >>> adds *any* noise it increases the NF above zero by the conventional >>> definition. The only way the NF can be negative is if the amplifier >>> removes noise from the input, or in other words, increases the SNR. >>> >> >>Yes that is correct, but the definitions are also correct. The flaw in >>the negative noise figure argument is that it is not possible to have a >>better SNRout than SNRin *for the same system conditions*. >> >>The apparent negative noise figure only come about by comparing the NF >>of the amp in a 50ohm system with the output from a system with >>something different on the input. >> >>The test method used is also very prone to measurement errors for low >>noise figures. >> >>Jeff > > To me, NF refers to "noise floor".
It probably would to an utter imbecile such as you.
> > Lets see him go below that. > > GPS received signals are among the lowest "power" signals we currently >grab. They sit just above the noise floor.
On Sun, 28 Jun 2015 23:05:40 -0400, Jerry Stuckle
<jstucklex@attglobal.net> wrote:

>On 6/28/2015 10:52 PM, DecadentLinuxUserNumeroUno wrote: >> On Sun, 28 Jun 2015 22:33:42 -0400, Jerry Stuckle >> <jstucklex@attglobal.net> Gave us: >> >>> On 6/28/2015 10:16 PM, DecadentLinuxUserNumeroUno wrote: >>>> On Sun, 28 Jun 2015 20:17:17 -0400, Jerry Stuckle >>>> <jstucklex@attglobal.net> 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 >>>>>>> <DLU1@DecadentLinuxUser.org> wrote: >>>>>>> >>>>>>>> On Sun, 28 Jun 2015 06:48:13 -0400, JW <none@dev.null> 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. >>>> >>> >>> ROFLMAO! Another troll heard from. >> >> You're an abject idiot, child. >> > >You're the one with the third grade name calling. Your mommy should >wash your mouth out with soap. > >>> And this is even a third grader - >>>from the immature name calling. >> >> No. The name used was quite clever and mature, unlike the lies you >> are about to spout. >> > >ROFLMAO! I take that back. Even a third grader would know it was >neither clever nor mature. You don't even reach that level. > >>> And one who can't read, either. >> >> I read fine, putz. Why are you even in this thread? Oh... that's >> right... to stir shit. >> > >You don't read at all. > >>> But then it's only what one expects from a no-name troll. >> >> I have a name.. Just not for retarded putz jackasses like you. >> > >No, you're only a nameless troll. You have no respectability here or in >other newsgroups. > >>> How many >>> other groups are you known for trolling? >> >> Not a troll, dumbfuck. >> >>> I found a half dozen in less >>> than a minute... >> >> Major lie. The only time I *ever* post outside the two groups I >> subscribe to is when a retard not unlike yourself decides to cross-post. > >No lie at all. Quite easy to find. > >>> >>> Why not go back to sci.electronics.design? >> >> I never left, you retarded dumbfuck. The OP is also from there. he >> merely posted here because it was thought that *some* of you might have >> an IQ above 12.. >> > >Unfortunately, you don't. > >>> Or don't they want you, either? >> >> This is Usenet, you zero brained dumbfuck. I do not give a fat flying >> fuck what you or anyone else in this realm "wants", and you are far too >> stupid to make assessments, as evidenced by the post you made, which I >> responded to. Then you chimed in with this childish baby bullshit. >> > >I know what usenet is. That doesn't mean that others in other >newsgroups want you. And from the posts I found, it's quite obvious you >are not wanted in a number of newsgroups. > >>> h >> >> You also can't proofread the horseshit you spew. >> > >ROFLAMO! Another troll response. > >Now you go running back to your mommy and tell here the mean old guy >spanked your ass.
Good effort Jerry! You scored a five-er. Even seasoned DimBulb baiters seldom achieve that. Well done!
On Mon, 29 Jun 2015 09:34:52 +0100, Pomegranate Bastard
<pommyB@dsl.pipex.com> Gave us:

>It probably would to an utter imbecile such as you.
Relating to you and your invasion of the group, it does mean noise factor, just not electronics related. Just like *you* are not electronics related or educated.
On Mon, 29 Jun 2015 05:42:57 -0400, DecadentLinuxUserNumeroUno
<DLU1@DecadentLinuxUser.org> wrote:

>On Mon, 29 Jun 2015 09:34:52 +0100, Pomegranate Bastard ><pommyB@dsl.pipex.com> Gave us: > >>It probably would to an utter imbecile such as you. > > Relating to you and your invasion of the group, it does mean noise >factor, just not electronics related. Just like *you* are not >electronics related or educated.
C'mon DikeyGurl, remind me of how you came to be named DimBulb. I could do with a good laugh!
On Mon, 29 Jun 2015 10:51:40 +0100, Pomegranate Bastard
<pommyB@dsl.pipex.com> Gave us:

>On Mon, 29 Jun 2015 05:42:57 -0400, DecadentLinuxUserNumeroUno ><DLU1@DecadentLinuxUser.org> wrote: > >>On Mon, 29 Jun 2015 09:34:52 +0100, Pomegranate Bastard >><pommyB@dsl.pipex.com> Gave us: >> >>>It probably would to an utter imbecile such as you. >> >> Relating to you and your invasion of the group, it does mean noise >>factor, just not electronics related. Just like *you* are not >>electronics related or educated. > >C'mon DikeyGurl, remind me of how you came to be named DimBulb. I >could do with a good laugh!
How can *I* remind YOU of some lame shit YOU made up?
On 6/29/2015 2:38 AM, DecadentLinuxUserNumeroUno wrote:
> On Sun, 28 Jun 2015 23:05:40 -0400, Jerry Stuckle > <jstucklex@attglobal.net> Gave us: > >> ROFLAMO! Another troll response. >> > Still with the decades outdated gang boy retard lingo... > >> Now you go running back to your mommy and tell here the mean old guy >> spanked your ass. > > Oh you have seriously dealt me a blow... NOT! What a sad joke you > are. >
ROFLMAO! You can't even put two thoughts into one message. Not that you've shown ANY coherent thoughts at all. Now go running to your mommy, little boy, and ask her to get you the psychiatric help you so desperately need. -- ================== Remove the "x" from my email address Jerry, AI0K jstucklex@attglobal.net ==================