HF+ Comparison
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Nils Schiffhauer
... thanks, Simon, and this IS quite a difference (worthwhile
waiting a bit ...)! 73 Nils Am 28.09.2017 um 21:44 schrieb Simon
Brown:
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chutton12000
There are differences in windowing techniques. You have a tradeoff between spectral bin leakage, sidelobes and resolution.
This may make no difference if all you are doing is looking at strong signals and don't care about high accuracy. But for more demanding uses like looking at small signals near a strong signal or phase noise of a signal, it can be important.
Chuck From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Nick Hall-Patch <nhp@...>
Sent: Thursday, September 28, 2017 4:22 PM To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] HF+ Comparison OK, didn't know whether "Youssef" windowing was unique to the HF+, especially as I know nothing about it. I haven't seen big differences using different windowing for the same receiver, but maybe, when there is a moment, same windowing for both SDRs
being evaluated?
Again appreciate your work on this.
On Thu, Sep 28, 2017 at 11:09 PM, Simon Brown
<simon@...> wrote:
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Nick Hall-Patch
OK, didn't know whether "Youssef" windowing was unique to the HF+, especially as I know nothing about it. I haven't seen big differences using different windowing for the same receiver, but maybe, when there is a moment, same windowing for both SDRs being evaluated? Again appreciate your work on this. On Thu, Sep 28, 2017 at 11:09 PM, Simon Brown <simon@...> wrote:
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There’s a list of options for Windowing, for some reason I had Youssef selected on the NetSDR.
Simon Brown, G4ELI
From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Nick Hall-Patch
understood...but why is "Youssef" windowing being used for the NetSDR?....that's what comes up when I click on the NetSDR screenshots... Thanks again. Nick |
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Nick Hall-Patch
understood...but why is "Youssef" windowing being used for the NetSDR?....that's what comes up when I click on the NetSDR screenshots... Thanks again.On Thu, Sep 28, 2017 at 10:51 PM, Simon Brown <simon@...> wrote:
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Hi,
This is the FFT Windowing, see https://en.wikipedia.org/wiki/Window_function Youssef is the brains department at Airspy, he designed his own algorithm. It’s really something for the CW / very narrow signals.
Simon Brown, G4ELI
From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Nick Hall-Patch
Quick question, probably indicating how far I am out of my depth.....but the couple of NetSDR displays I looked at in your link used "Youssef" windowing, which I don't know about.....whereas the HF+ displays used more conventional windowing. Why "Youssef" windowing for the NetSDR please? Thanks. Nick
On Thu, Sep 28, 2017 at 9:44 PM, Simon Brown <simon@...> wrote:
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Nick Hall-Patch
Quick question, probably indicating how far I am out of my depth.....but the couple of NetSDR displays I looked at in your link used "Youssef" windowing, which I don't know about.....whereas the HF+ displays used more conventional windowing. Why "Youssef" windowing for the NetSDR please? On Thu, Sep 28, 2017 at 9:44 PM, Simon Brown <simon@...> wrote:
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So,
Done properly (or at least better) this time: http://sdr-radio.com/AirspyHFPlus
Simon Brown, G4ELI
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