Re: [Elecraft] K3 Beta Firmware Rev. 3.57: Synchronous AM Detection (AM-S); misc. improvements
Just did the upgrade. Outstanding. P3 is a joy. Don...w2xb -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Beta-Firmware-Rev-3-57-Synchronous-AM-Detection-AM-S-misc-improvements-tp3983997p5920508.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta Firmware Rev. 3.57: Synchronous AM Detection (AM-S); misc. improvements
Hi Wayne This was one of the features that I 'really' wanted in the K3 and I am so pleased it works so well.. Enjoying my SW listening all the more now Thanks! 73 John VE3NFK wayne burdick wrote: K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now available. This revision includes Synchronous AM detection, which has a clear advantage over the regular AM detector during selective fading. In this mode, the K3 can optionally track AM stations that may be slightly mistuned, as you might find in an AM round-table on 75 m. It's also convenient for automatically zeroing in on AM broadcast stations. There are other considerations when using Synch AM, so you should read the release notes (below) before trying it. We'll be further refining our AM-S implementation in a later release, based on your feedback. Please send any questions to k3supp...@elecraft.com. For instructions on how to load beta firmware, see: http://www.elecraft.com/K3/k3_software.htm 73, Wayne N6KR * * * MCU 3.57 / DSP 2.45, 11-7-2009 Misc. Improvements: * TUNE SWITCH: “Double beep” with NR on eliminated. * DATA A: Loss of power when using TUNE corrected. New Feature: Synchronous AM Receive * SYNCHRONOUS AM: Outperforms regular AM during selective fading. Provides optional automatic VFO tracking of AM signals up to +/- 2.5 kHz. Select AM mode, then hold ALT to select AM-S. The -S icon flashes slowly if the signal is noisy. Select AM-S LSB or USB using SHIFT; one of the two sidebands may reduce QRM. Sync AM also works with diversity receive. (Note: Some AM broadcast stations encode their carrier, resulting in a low-pitched noise when Sync AM is turned on.) With Sync AM you can tune manually, or use automatic VFO tracking: -- If tuning manually, you need to tune to within +/- 10 Hz of the actual carrier frequency, at which point the K3 will phase-lock to the carrier. -- To enable VFO tracking, tap CWT, which turns on the T icon. Or, tap SPOT to engage VFO tracking just long enough to lock. When tracking is on, the VFO may “hunt” slowly across a span of several Hz. IMPORTANT: For AM QSOs, use SPLIT mode when VFO tracking is turned on. VFO B (TX) will remain fixed while VFO A tracks RX signals. Limitations: At present, VFO B cannot auto-tune in AM-S. Also, both VFOs will always be in the same mode (AM-S LSB or USB). Remote Control Command Changes: * UP0/DN0/UP$0/DN$0 moves VFOs 1 Hz. Similarly, UP8 and UP9 move the VFOs by 100 and 200 Hz, respectively. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- View this message in context: http://n2.nabble.com/K3-Beta-Firmware-Rev-3-57-Synchronous-AM-Detection-AM-S-misc-improvements-tp3983997p3990331.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 Beta Firmware Rev. 3.57: Synchronous AM Detection (AM-S); misc. improvements
K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now available. This revision includes Synchronous AM detection, which has a clear advantage over the regular AM detector during selective fading. In this mode, the K3 can optionally track AM stations that may be slightly mistuned, as you might find in an AM round-table on 75 m. It's also convenient for automatically zeroing in on AM broadcast stations. There are other considerations when using Synch AM, so you should read the release notes (below) before trying it. We'll be further refining our AM-S implementation in a later release, based on your feedback. Please send any questions to k3supp...@elecraft.com. For instructions on how to load beta firmware, see: http://www.elecraft.com/K3/k3_software.htm 73, Wayne N6KR * * * MCU 3.57 / DSP 2.45, 11-7-2009 Misc. Improvements: * TUNE SWITCH: “Double beep” with NR on eliminated. * DATA A: Loss of power when using TUNE corrected. New Feature: Synchronous AM Receive * SYNCHRONOUS AM: Outperforms regular AM during selective fading. Provides optional automatic VFO tracking of AM signals up to +/- 2.5 kHz. Select AM mode, then hold ALT to select AM-S. The -S icon flashes slowly if the signal is noisy. Select AM-S LSB or USB using SHIFT; one of the two sidebands may reduce QRM. Sync AM also works with diversity receive. (Note: Some AM broadcast stations encode their carrier, resulting in a low-pitched noise when Sync AM is turned on.) With Sync AM you can tune manually, or use automatic VFO tracking: -- If tuning manually, you need to tune to within +/- 10 Hz of the actual carrier frequency, at which point the K3 will phase-lock to the carrier. -- To enable VFO tracking, tap CWT, which turns on the T icon. Or, tap SPOT to engage VFO tracking just long enough to lock. When tracking is on, the VFO may “hunt” slowly across a span of several Hz. IMPORTANT: For AM QSOs, use SPLIT mode when VFO tracking is turned on. VFO B (TX) will remain fixed while VFO A tracks RX signals. Limitations: At present, VFO B cannot auto-tune in AM-S. Also, both VFOs will always be in the same mode (AM-S LSB or USB). Remote Control Command Changes: * UP0/DN0/UP$0/DN$0 moves VFOs 1 Hz. Similarly, UP8 and UP9 move the VFOs by 100 and 200 Hz, respectively. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta Firmware Rev. 3.57: Synchronous AM Detection (AM-S); misc. improvements
I tried this out tonight; WWV on 10 and 5 MHz; found that at this time, Synchronous USB was better than LSB, and using CWT to auto-track showed as much as 7 Hz offset in tracking. It was very interesting and I look forward to using it more for SWL in tough conditions. Thanks! 73 de Dave, W5SV Wayne Burdick wrote: K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now available. This revision includes Synchronous AM detection, which has a clear advantage over the regular AM detector during selective fading. In this mode, the K3 can optionally track AM stations that may be slightly mistuned, as you might find in an AM round-table on 75 m. It's also convenient for automatically zeroing in on AM broadcast stations. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta Firmware Rev. 3.57: Synchronous AM Detection (AM-S); misc. improvements
I have been using the Sync tonight on several AM SW stations. I have had very good results so far. Depending on the QRM the USB LSB do make a great difference. I have been waiting for this feature! Thanks, Rick -- KJ5QY wayne burdick wrote: K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now available. This revision includes Synchronous AM detection, which has a clear advantage over the regular AM detector during selective fading. In this mode, the K3 can optionally track AM stations that may be slightly mistuned, as you might find in an AM round-table on 75 m. It's also convenient for automatically zeroing in on AM broadcast stations. There are other considerations when using Synch AM, so you should read the release notes (below) before trying it. We'll be further refining our AM-S implementation in a later release, based on your feedback. Please send any questions to k3supp...@elecraft.com. For instructions on how to load beta firmware, see: http://www.elecraft.com/K3/k3_software.htm 73, Wayne N6KR * * * MCU 3.57 / DSP 2.45, 11-7-2009 Misc. Improvements: * TUNE SWITCH: “Double beep” with NR on eliminated. * DATA A: Loss of power when using TUNE corrected. New Feature: Synchronous AM Receive * SYNCHRONOUS AM: Outperforms regular AM during selective fading. Provides optional automatic VFO tracking of AM signals up to +/- 2.5 kHz. Select AM mode, then hold ALT to select AM-S. The -S icon flashes slowly if the signal is noisy. Select AM-S LSB or USB using SHIFT; one of the two sidebands may reduce QRM. Sync AM also works with diversity receive. (Note: Some AM broadcast stations encode their carrier, resulting in a low-pitched noise when Sync AM is turned on.) With Sync AM you can tune manually, or use automatic VFO tracking: -- If tuning manually, you need to tune to within +/- 10 Hz of the actual carrier frequency, at which point the K3 will phase-lock to the carrier. -- To enable VFO tracking, tap CWT, which turns on the T icon. Or, tap SPOT to engage VFO tracking just long enough to lock. When tracking is on, the VFO may “hunt” slowly across a span of several Hz. IMPORTANT: For AM QSOs, use SPLIT mode when VFO tracking is turned on. VFO B (TX) will remain fixed while VFO A tracks RX signals. Limitations: At present, VFO B cannot auto-tune in AM-S. Also, both VFOs will always be in the same mode (AM-S LSB or USB). Remote Control Command Changes: * UP0/DN0/UP$0/DN$0 moves VFOs 1 Hz. Similarly, UP8 and UP9 move the VFOs by 100 and 200 Hz, respectively. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- View this message in context: http://n2.nabble.com/K3-Beta-Firmware-Rev-3-57-Synchronous-AM-Detection-AM-S-misc-improvements-tp3983997p3984659.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
