Frequency display on P3?
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Here's what I'm sure is a beginner question.
If I feed an accurate signal from a waveform generator into my K3S, on the P3 it appears right about 120 Hz higher than the actual frequency. This seems to be independent of the mode the K3S is in. What causes that? I noticed this when I had my K3S/P3 running while working the ARRL Frequency Measurement Test with other gear, and was curious about it. Thanks much, Frank K6FOD ______________________________________________________________ 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 Message delivered to [hidden email] |
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It sounds like you need to do the frequency calibration as documented on
page 39 of the manual <https://ftp.elecraft.com/P3/Manuals%20Downloads/E740152%20P3%20Owner's%20man%20Rev%20H1.pdf> : https://ftp.elecraft.com/P3/Manuals%20Downloads/E740152%20P3%20Owner's%20man%20Rev%20H1.pdf Max NG7M On Fri, Apr 24, 2020 at 7:14 PM Frank O'Donnell <[hidden email]> wrote: > Here's what I'm sure is a beginner question. > > If I feed an accurate signal from a waveform generator into my K3S, on > the P3 it appears right about 120 Hz higher than the actual frequency. > This seems to be independent of the mode the K3S is in. What causes that? > > I noticed this when I had my K3S/P3 running while working the ARRL > Frequency Measurement Test with other gear, and was curious about it. > > Thanks much, > > Frank K6FOD > > > ______________________________________________________________ > 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 > Message delivered to [hidden email] > -- M. George ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by Frank O'Donnell
The P3 has a menu entry to calibrate its frequency MENU:Ref Cal
The calibration prodedure is on page 37 of the manual. I like to use an AM broadcast station (preferably near the top of the band) for calibration because these frequencies are highly accurate and AM mode puts the carrier right at the center of the P3 display. Alan N1AL On 2020-04-24 19:13, Frank O'Donnell wrote: > Here's what I'm sure is a beginner question. > > If I feed an accurate signal from a waveform generator into my K3S, on the P3 it appears right about 120 Hz higher than the actual frequency. This seems to be independent of the mode the K3S is in. What causes that? > > I noticed this when I had my K3S/P3 running while working the ARRL Frequency Measurement Test with other gear, and was curious about it. > > Thanks much, > > Frank K6FOD > > ______________________________________________________________ > 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 > Message delivered to [hidden email] 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 Message delivered to [hidden email] |
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In reply to this post by ng7m
+1, yup! Mine is spot on, as calibrated... as in less than 1 Hz error rate.
______________________ Clay Autery, KY5G (318) 518-1389 On 04/24/20 20:27, M. George wrote: > It sounds like you need to do the frequency calibration as documented on > page 39 of the manual > <https://ftp.elecraft.com/P3/Manuals%20Downloads/E740152%20P3%20Owner's%20man%20Rev%20H1.pdf> > : > https://ftp.elecraft.com/P3/Manuals%20Downloads/E740152%20P3%20Owner's%20man%20Rev%20H1.pdf > > Max NG7M > > > On Fri, Apr 24, 2020 at 7:14 PM Frank O'Donnell <[hidden email]> wrote: > >> Here's what I'm sure is a beginner question. >> >> If I feed an accurate signal from a waveform generator into my K3S, on >> the P3 it appears right about 120 Hz higher than the actual frequency. >> This seems to be independent of the mode the K3S is in. What causes that? >> >> I noticed this when I had my K3S/P3 running while working the ARRL >> Frequency Measurement Test with other gear, and was curious about it. >> >> Thanks much, >> >> Frank K6FOD >> >> >> ______________________________________________________________ >> 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 >> Message delivered to [hidden email] >> > 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 Message delivered to [hidden email] |
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