K3: RF in compared to AF out, in dB?

[John Harper AE5X]

Does anyone know if any charts or graphs exist online that illustrate the effect of IF bandwidth at the audio stage?

I know Clifton Labs compares various IF bandwidths with different roofing filters - I'm looking for a visual representation of audio output vs. RF freq in order to get an idea of how quickly (in dB) the audio gets attenuated as you tune away from zero beat, for a given bandwidth...say, 150Hz dialed in.

Thanks,

John AE5X
http://www.ae5x.com/blog
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[David Gilbert]

Why wouldn't Spectrogram show you that?  Real time right on your
computer, and it's free.

Dave   AB7E



On 7/16/2011 6:10 AM, John Harper wrote:

> Does anyone know if any charts or graphs exist online that illustrate the effect of IF bandwidth at the audio stage?
>
> I know Clifton Labs compares various IF bandwidths with different roofing filters - I'm looking for a visual representation of audio output vs. RF freq in order to get an idea of how quickly (in dB) the audio gets attenuated as you tune away from zero beat, for a given bandwidth...say, 150Hz dialed in.
>
> Thanks,
>
> John AE5X
> http://www.ae5x.com/blog
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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[KK7P]

You can also use the AFV/dBV function in the K3, see Owner's Manual for
details on how to use.

73,

Lyle KK7P

>> Does anyone know if any charts or graphs exist online that illustrate the effect of IF bandwidth at the audio stage?

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[John Harper AE5X]

Thanks for the info all - Spectrogram has done what I needed doig.

73,

John Harper
http://www.ae5x.com/blog

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