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Re: SNR meter, bandwidth and gain adjustment for transverters
All three copies are wrong.
{^_^}
All three copies are wrong.
{^_^}
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By
jdow
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#63334
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Re: SNR meter, bandwidth and gain adjustment for transverters
Fortunately - I am about to become persona non-grata over this nonsense from you.
{+_+}
Fortunately - I am about to become persona non-grata over this nonsense from you.
{+_+}
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By
jdow
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#63333
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Re: SNR meter, bandwidth and gain adjustment for transverters
You do not get it. I can see that clearly, Actually the total power in a 100% modulated pure AM signal is about 3.5218251811136248416257801706124 dB greater than the carrier power
You do not get it. I can see that clearly, Actually the total power in a 100% modulated pure AM signal is about 3.5218251811136248416257801706124 dB greater than the carrier power
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By
jdow
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#63332
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Re: SNR meter, bandwidth and gain adjustment for transverters
This is why I loved working on GPS, almost the quintessence of time keeping. It's the best answer most people can afford.
{o.o}
This is why I loved working on GPS, almost the quintessence of time keeping. It's the best answer most people can afford.
{o.o}
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By
jdow
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#63331
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Re: SNR meter, bandwidth and gain adjustment for transverters
Joanne,
I probably misspoke at some point if/when I said BCFM carrier is always the greatest power anywhere in the passband, so I retract any such statement.
However, that statement does hold true for
Joanne,
I probably misspoke at some point if/when I said BCFM carrier is always the greatest power anywhere in the passband, so I retract any such statement.
However, that statement does hold true for
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By
Mark Cayton
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#63330
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Edited
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Re: SNR meter, bandwidth and gain adjustment for transverters
Joanne:
I just love your rants. I love them because I'm usually learning quite a bit as I read them.
You provide immeasurable benefit to us all. I know how much It must pain you to hear me say
Joanne:
I just love your rants. I love them because I'm usually learning quite a bit as I read them.
You provide immeasurable benefit to us all. I know how much It must pain you to hear me say
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By
Curt Faulk
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#63329
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Re: SNR meter, bandwidth and gain adjustment for transverters
Bob - wd6dod
By
Robert Lorenzini
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#63328
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Re: SAQ 17.2 kHz QRV today
I try to listen to the SAQ transmissions every year.
For an antenna I hung about 15m of wire from a 2nd floor window to the roof of my shed.
My radio was a KIWI shortwave receiver. The nice thing is
I try to listen to the SAQ transmissions every year.
For an antenna I hung about 15m of wire from a 2nd floor window to the roof of my shed.
My radio was a KIWI shortwave receiver. The nice thing is
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By
PE1OSQ
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#63327
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Edited
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Re: SNR meter, bandwidth and gain adjustment for transverters
See my discussion. I got my wind up and had to work it out making you guys the victims. But it does explain where you are off the reservation and where others have gone off the
See my discussion. I got my wind up and had to work it out making you guys the victims. But it does explain where you are off the reservation and where others have gone off the
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By
jdow
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#63326
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Re: SNR meter, bandwidth and gain adjustment for transverters
I thought perhaps he was referring to omnipotent signals.
-Q
I thought perhaps he was referring to omnipotent signals.
-Q
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By
Bob Dengler
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#63325
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Re: 3D waterfall
Found the lead from the charger arcing where it attaches to the fence. Put two stainless steel washers and a 1/4 stainless bolt and nut on it. Clamped the hell out of it.
On my way to KSFO (San
Found the lead from the charger arcing where it attaches to the fence. Put two stainless steel washers and a 1/4 stainless bolt and nut on it. Clamped the hell out of it.
On my way to KSFO (San
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By
Kriss Kliegle KA1GJU
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#63324
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Re: 10 kHz-150 kHz Band Sweep from EN70 Indiana
Hi Gedas,
Can you post a recording direct from SDRC, please? It would be nice to be able to dive into the waterfall and look at some of the weak signals close up, although it was easy enough to pick
Hi Gedas,
Can you post a recording direct from SDRC, please? It would be nice to be able to dive into the waterfall and look at some of the weak signals close up, although it was easy enough to pick
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By
D R
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#63323
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Re: SNR meter, bandwidth and gain adjustment for transverters
But S-Meter is not SNR meter. Although the SNR meter should be approximated from the S-Meter reading.
{^_-}
But S-Meter is not SNR meter. Although the SNR meter should be approximated from the S-Meter reading.
{^_-}
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By
jdow
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#63322
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Re: SNR meter, bandwidth and gain adjustment for transverters
Please, Bob, distinguish what you mean with reference to time domain or spectral domain. It all makes SO MUCH more sense in time domain. Then terms like "quasi peak" make sense. It's meter rise
Please, Bob, distinguish what you mean with reference to time domain or spectral domain. It all makes SO MUCH more sense in time domain. Then terms like "quasi peak" make sense. It's meter rise
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By
jdow
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#63321
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Re: SNR meter, bandwidth and gain adjustment for transverters
WTFF is "Continuum mode". You are losing your audience by inventing terms that make no sense. Do you mean time domain where everything flows along in a sampled stream? If so then time
WTFF is "Continuum mode". You are losing your audience by inventing terms that make no sense. Do you mean time domain where everything flows along in a sampled stream? If so then time
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By
jdow
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#63320
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Re: SNR meter, bandwidth and gain adjustment for transverters
I'm sorry guys - my autisim has kicked in and I have to get this off my chest before I explode.
As originally conceived the S-Meter was an indication of channel power. Meter ballistics
I'm sorry guys - my autisim has kicked in and I have to get this off my chest before I explode.
As originally conceived the S-Meter was an indication of channel power. Meter ballistics
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By
jdow
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#63319
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Re: SNR meter, bandwidth and gain adjustment for transverters
Joanne,
I didn't "go off the cliff" anywhere.
1) "So if you have a signal that features multiple peaks all about the same amplitude how big is the S-Meter error?" What "error" are you referring to??
Joanne,
I didn't "go off the cliff" anywhere.
1) "So if you have a signal that features multiple peaks all about the same amplitude how big is the S-Meter error?" What "error" are you referring to??
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By
Mark Cayton
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#63318
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Re: SNR meter, bandwidth and gain adjustment for transverters
The total power in a given bandwidth cannot be properly derived from a spectrum display. It can be derived easily from a filter followed by demodulator design. You take the I and Q values,
The total power in a given bandwidth cannot be properly derived from a spectrum display. It can be derived easily from a filter followed by demodulator design. You take the I and Q values,
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By
jdow
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#63317
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Re: 3D waterfall
Probably they do match in terms of power per pixel. The number of pixels wide makes a difference in levels.
{o.o}
Probably they do match in terms of power per pixel. The number of pixels wide makes a difference in levels.
{o.o}
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By
jdow
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#63316
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Re: 3D waterfall OT
I wish you had not mentioned that. I had to go looking. And unfortunately what has been seen cannot be unseen. AAAAAAIIIIIIIEEEEEEEEEE! My eyes my eyes they burn.
{+_+}
I wish you had not mentioned that. I had to go looking. And unfortunately what has been seen cannot be unseen. AAAAAAIIIIIIIEEEEEEEEEE! My eyes my eyes they burn.
{+_+}
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By
jdow
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#63315
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