PX3 Anomaly
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Finally got the KX3 – PX3 – KXPA100 system cabled together and on the air
today, all of the F/W updated. All OK but for two anomalies, one of them a bit of a nuisance. The PX3 shows a double sharp spike offset from the tuned frequency about 600 and 700 Hz (an eyeball estimate), at about S2. The twin spikes just stay there a fixed offset away from the marker as the rest of the band marches by. (The PX3 is in tracking mode – I haven’t downloaded the beta revision.) Same thing on every band I’ve tried – 10, 15, 20 and 40. Some other symptoms: The small bit of spectrum (about 100 Hz) between the two spikes is devoid of signal – jet black even when the ref level is set so that the rest of the waterfall span is showing blue. The spikes appear in CW mode but not in AM or SSB. They switch sides when I switch cw sidebands – 600 and 700 Hz below center when the KX3 is in CW rev, and the same distance above center when it’s changed back. When the i/Q cable is disconnected at either end, the spikes slowly decline. But with the cable connected and the KX3 power turned off, they are still there on the PX3. The spikes remain at 600 and 700 Hz offset from center regardless of the span setting. Weird. And troubling, because 300 - 600 Hz is a typical XIT offset I use in pileups when the DX isn’t working “up.” Anyone have any ideas? Anyone seen this before? The other glitch is much less trouble. The KX3 setting sometimes switches itself from PA Mode On to PA Mode off. I think I’ve figured it out – if I turn the KXPA100 power off before turning the KX3 off, or if I turn the KX3 on before powering up the amp, the KX3 must be sensing “no amp” and so switching itself back to PA Mode Off. But then when the amp comes on, the KX3 doesn’t sense that and switch back to PA Mode On. An intelligent default choice, maybe. Any way to defeat it? Ted, KN1CBR ______________________________________________________________ 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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Make sure those (all!) cables are fully inserted,
Ted. I've found that to take more "push" in the case of the KX3 and PX3 than some of my other devices. Phil W7OX On 6/13/15 4:39 PM, Dauer, Edward wrote: > Finally got the KX3 – PX3 – KXPA100 system cabled together and on the air > today, all of the F/W updated. All OK but for two anomalies, one of them > a bit of a nuisance. > > > The PX3 shows a double sharp spike offset from the tuned frequency about > 600 and 700 Hz (an eyeball estimate), at about S2. The twin spikes just > stay there a fixed offset away from the marker as the rest of the band > marches by. (The PX3 is in tracking mode – I haven’t downloaded the beta > revision.) Same thing on every band I’ve tried – 10, 15, 20 and 40. Some > other symptoms: > > > The small bit of spectrum (about 100 Hz) between the two spikes is devoid > of signal – jet black even when the ref level is set so that the rest of > the waterfall span is showing blue. > > > The spikes appear in CW mode but not in AM or SSB. They switch sides when > I switch cw sidebands – 600 and 700 Hz below center when the KX3 is in CW > rev, and the same distance above center when it’s changed back. > > > When the i/Q cable is disconnected at either end, the spikes slowly > decline. But with the cable connected and the KX3 power turned off, they > are still there on the PX3. > > > The spikes remain at 600 and 700 Hz offset from center regardless of the > span setting. > > > Weird. And troubling, because 300 - 600 Hz is a typical XIT offset I use > in pileups when the DX isn’t working “up.” Anyone have any ideas? Anyone > seen this before? > > > The other glitch is much less trouble. The KX3 setting sometimes switches > itself from PA Mode On to PA Mode off. I think I’ve figured it out – if I > turn the KXPA100 power off before turning the KX3 off, or if I turn the > KX3 on before powering up the amp, the KX3 must be sensing “no amp” and so > switching itself back to PA Mode Off. But then when the amp comes on, the > KX3 doesn’t sense that and switch back to PA Mode On. An intelligent > default choice, maybe. Any way to defeat it? > > > > Ted, KN1CBR ______________________________________________________________ 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 Edward A. Dauer
Both of these problems have been reported here. The second problem is better but still exists. On the first with the blip that is offset I use the workaround of operating CW with a reverse offset until they get it fixed. At least there isn't any off set used on field day.
John K7JLT Phil Wheeler <[hidden email]> wrote: >Make sure those (all!) cables are fully inserted, >Ted. I've found that to take more "push" in the >case of the KX3 and PX3 than some of my other devices. > >Phil W7OX > >On 6/13/15 4:39 PM, Dauer, Edward wrote: >> Finally got the KX3 – PX3 – KXPA100 system cabled together and on the air >> today, all of the F/W updated. All OK but for two anomalies, one of them >> a bit of a nuisance. >> >> >> The PX3 shows a double sharp spike offset from the tuned frequency about >> 600 and 700 Hz (an eyeball estimate), at about S2. The twin spikes just >> stay there a fixed offset away from the marker as the rest of the band >> marches by. (The PX3 is in tracking mode – I haven’t downloaded the beta >> revision.) Same thing on every band I’ve tried – 10, 15, 20 and 40. Some >> other symptoms: >> >> >> The small bit of spectrum (about 100 Hz) between the two spikes is devoid >> of signal – jet black even when the ref level is set so that the rest of >> the waterfall span is showing blue. >> >> >> The spikes appear in CW mode but not in AM or SSB. They switch sides when >> I switch cw sidebands – 600 and 700 Hz below center when the KX3 is in CW >> rev, and the same distance above center when it’s changed back. >> >> >> When the i/Q cable is disconnected at either end, the spikes slowly >> decline. But with the cable connected and the KX3 power turned off, they >> are still there on the PX3. >> >> >> The spikes remain at 600 and 700 Hz offset from center regardless of the >> span setting. >> >> >> Weird. And troubling, because 300 - 600 Hz is a typical XIT offset I use >> in pileups when the DX isn’t working “up.” Anyone have any ideas? Anyone >> seen this before? >> >> >> The other glitch is much less trouble. The KX3 setting sometimes switches >> itself from PA Mode On to PA Mode off. I think I’ve figured it out – if I >> turn the KXPA100 power off before turning the KX3 off, or if I turn the >> KX3 on before powering up the amp, the KX3 must be sensing “no amp” and so >> switching itself back to PA Mode Off. But then when the amp comes on, the >> KX3 doesn’t sense that and switch back to PA Mode On. An intelligent >> default choice, maybe. Any way to defeat it? >> >> >> >> Ted, KN1CBR > >______________________________________________________________ >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 Edward A. Dauer
For the KXPA100 issue (PA MODE ON to OFF), just leave the KXPA100
powered on full-time. This works in my mobile installation, meaning the KXPA100 is always available. This is not true if the KX3 is removed, when PA MODE will default OFF because of the missing KXPA100. My mobile installation has a switched circuit for the KXPA100 and KX3. If you have a separate power supply for the KXPA100, make sure it's on before powering on the the attached KX3. 73, matt W6NIA On Sat, 13 Jun 2015 23:39:17 +0000, you wrote: >Finally got the KX3 PX3 KXPA100 system cabled together and on the air >today, all of the F/W updated. All OK but for two anomalies, one of them >a bit of a nuisance. > > >The PX3 shows a double sharp spike offset from the tuned frequency about >600 and 700 Hz (an eyeball estimate), at about S2. The twin spikes just >stay there a fixed offset away from the marker as the rest of the band >marches by. (The PX3 is in tracking mode I havent downloaded the beta >revision.) Same thing on every band Ive tried 10, 15, 20 and 40. Some >other symptoms: > > >The small bit of spectrum (about 100 Hz) between the two spikes is devoid >of signal jet black even when the ref level is set so that the rest of >the waterfall span is showing blue. > > >The spikes appear in CW mode but not in AM or SSB. They switch sides when >I switch cw sidebands 600 and 700 Hz below center when the KX3 is in CW >rev, and the same distance above center when its changed back. > > >When the i/Q cable is disconnected at either end, the spikes slowly >decline. But with the cable connected and the KX3 power turned off, they >are still there on the PX3. > > >The spikes remain at 600 and 700 Hz offset from center regardless of the >span setting. > > >Weird. And troubling, because 300 - 600 Hz is a typical XIT offset I use >in pileups when the DX isnt working up. Anyone have any ideas? Anyone >seen this before? > > >The other glitch is much less trouble. The KX3 setting sometimes switches >itself from PA Mode On to PA Mode off. I think Ive figured it out if I >turn the KXPA100 power off before turning the KX3 off, or if I turn the >KX3 on before powering up the amp, the KX3 must be sensing no amp and so >switching itself back to PA Mode Off. But then when the amp comes on, the >KX3 doesnt sense that and switch back to PA Mode On. An intelligent >default choice, maybe. Any way to defeat it? > > > >Ted, KN1CBR > >______________________________________________________________ >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] -- "Always store beer in a dark place." -R. Heinlein ______________________________________________________________ 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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