K4 Noise Blanking & Sensitivity - Again
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K4 Noise Blanking & Sensitivity - Again
 
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Hi Wayne & Eric,
I’ve asked this question twice already with no answer. Perhaps it’s the way I phrased it. So, let me ask it a different way: 1. Noise Blanking: On the website, under K4 FAQ - Performance Differences, it says "In a direct-sampling radio like the K4, the DSP can “see” a wider bandwidth in its signal chain, allowing it to provide higher-performance noise reduction, noise blanking…” Can you quantify the improvement of the K4 over the K3S regarding noise reduction and noise blanking? 2. Sensitivity: Rob Sherwood’s transceiver test data shows the following sensitivity for the K3S (in microvolts): 0.27 0.20b <http://www.sherweng.com/table.html#key> 0.0810 <http://www.sherweng.com/table.html#key> b Built-in preamp actuated 10 10 meter data, preamp ON How does the K4 compare with the K3S on this measure of sensitivity? Thanks in advance. John WA1EAZ Sensitivity (uV) Sensitivity (uV) Sensitivity (uV) ______________________________________________________________ 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 |
Re: K4 Noise Blanking & Sensitivity - Again
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Administrator
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> On May 29, 2019, at 4:15 AM, John Stengrevics <[hidden email]> wrote: > > 1. Noise Blanking: On the website, under K4 FAQ - Performance Differences, it says "In a direct-sampling radio like the K4, the DSP can “see” a wider bandwidth in its signal chain, allowing it to provide higher-performance noise reduction, noise blanking…” Can you quantify the improvement of the K4 over the K3S regarding noise reduction and noise blanking? This is in-progress DSP code, so full characterization is pending. For example, there will be a completely new NR algorithm available. > 2. Sensitivity.... The K4 will be similar to the K3 in sensitivity. Again, we're still finalizing hardware and will provide full specs once available. Wayne ______________________________________________________________ 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 |
Re: K4 Noise Blanking & Sensitivity - Again
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Administrator
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In reply to this post by stengrevics
Yes. Historically a significant percentage of our K2 and K3 buyers chose the QRP model. In some cases operators use the radio as an IF for transverters, etc.
73, Wayne N6KR > On May 29, 2019, at 4:15 AM, John Stengrevics <[hidden email]> wrote: > > Hi Wayne & Eric, > > I’ve asked this question twice already with no answer. Perhaps it’s the way I phrased it. So, let me ask it a different way: > > 1. Noise Blanking: On the website, under K4 FAQ - Performance Differences, it says "In a direct-sampling radio like the K4, the DSP can “see” a wider bandwidth in its signal chain, allowing it to provide higher-performance noise reduction, noise blanking…” Can you quantify the improvement of the K4 over the K3S regarding noise reduction and noise blanking? > > 2. Sensitivity: Rob Sherwood’s transceiver test data shows the following sensitivity for the K3S (in microvolts): > > 0.27 > 0.20b <http://www.sherweng.com/table.html#key> > 0.0810 <http://www.sherweng.com/table.html#key> > > b Built-in preamp actuated > 10 10 meter data, preamp ON > > How does the K4 compare with the K3S on this measure of sensitivity? > > > Thanks in advance. > > John > WA1EAZ > > > > > > Sensitivity > (uV) > > Sensitivity > (uV) > Sensitivity > (uV) > > > > > > > > > > ______________________________________________________________ > 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 ______________________________________________________________ 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 |
Re: K4 Noise Blanking & Sensitivity - Again
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Hi Wayne,
I think you answered someone else’s question!? John WA1EAZ Sent from my iPhone > On May 29, 2019, at 11:47 AM, Wayne Burdick <[hidden email]> wrote: > > Yes. Historically a significant percentage of our K2 and K3 buyers chose the QRP model. In some cases operators use the radio as an IF for transverters, etc. > > 73, > Wayne > N6KR > > > >> On May 29, 2019, at 4:15 AM, John Stengrevics <[hidden email]> wrote: >> >> Hi Wayne & Eric, >> >> I’ve asked this question twice already with no answer. Perhaps it’s the way I phrased it. So, let me ask it a different way: >> >> 1. Noise Blanking: On the website, under K4 FAQ - Performance Differences, it says "In a direct-sampling radio like the K4, the DSP can “see” a wider bandwidth in its signal chain, allowing it to provide higher-performance noise reduction, noise blanking…” Can you quantify the improvement of the K4 over the K3S regarding noise reduction and noise blanking? >> >> 2. Sensitivity: Rob Sherwood’s transceiver test data shows the following sensitivity for the K3S (in microvolts): >> >> 0.27 >> 0.20b <http://www.sherweng.com/table.html#key> >> 0.0810 <http://www.sherweng.com/table.html#key> >> >> b Built-in preamp actuated >> 10 10 meter data, preamp ON >> >> How does the K4 compare with the K3S on this measure of sensitivity? >> >> >> Thanks in advance. >> >> John >> WA1EAZ >> >> >> >> >> >> Sensitivity >> (uV) >> >> Sensitivity >> (uV) >> Sensitivity >> (uV) >> >> >> >> >> >> >> >> >> >> ______________________________________________________________ >> 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 > ______________________________________________________________ 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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