James, If he PX3 utility cannot connect to the PX3 then you cannot expect the iMac to connect to the KX3 through the PX3 with the PX3 powered on, because that requires a working connection to the PX3 so that the PX3 can then talk on a different UART to the KX3. The reason it works to the KX3 with the power switched off in the PX3 is that then it goes straight through bypassing the UARTS in the PX3.
Here is a rough block diagram With PX3 power ON PC ---- > PX3 UART1 ---- PX3 UART2 --------> KX3 With PX3 power OFF PC -----> PX3 --------------------------------> KX3 So, to troubleshoot you can disconnect everything from the PX3 apart from the power cable and the connection to your IMac and see if you can get the PX3 connected using the PX3 utility. If you cannot then I am afraid you have a problem. You won't get anything through to the KX3 with the PX3 switched ON while that problem exists. Very frustrating I can understand. 73 David Anderson GM4JJJ > On 25 Jun 2015, at 22:45, James Bennett <[email protected]> wrote: > > Tried it. In fact, not only did I try the one that connects to my K3/P3, I > tried a spare that I use occasionally for my KAT500. Neither of the three > allow the PX3 & KX3 pair to work if the PX3 has power. If I power off the > PX3, then the KX3 signal flows to the iMac like it did yesterday. > Arrghhhhh....... :-( > >> On Thursday, Jun 25, 2015, at Thursday, 2:39 PM, David Ahrendts >> <[email protected]> wrote: >> >> My KX3-PX3 (and KPA100) are connected to an iMac also. On the theory that >> it’s the KUSB cable, or the chip in the cable, try swapping the KUSB cable >> with another. Just a thought. >> Sure sounds like a software switch somewhere. >> >>> On Jun 25, 2015, at 2:16 PM, Tom Schaefer <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> Can you try a different computer? >>> >>> Principal Solutions Architect >>> Better Software Solutions, Inc. >>> 727-437-2771 >>> >>>> On Jun 25, 2015, at 4:17 PM, James Bennett <[email protected] >>>> <mailto:[email protected]>> wrote: >>>> >>>> I verified that both the KX3 and PX3 are set to 38,400. Nothing has >>>> changed, from an operator perspective: the PX3 has been sitting on my >>>> desk, untouched since the last time I used it a day or so ago. Very >>>> frustrating and disappointing, as I was hoping to use these two units to >>>> operate Field Day this weekend. I can use the KX3 w/o the PX3, but it's >>>> not what I had planned. Maybe someone else will have an idea. If not, I'l >>>> call Elecraft on Friday morning. >>>> >>>> Jim >>>> >>>> >>>>> On Thursday, Jun 25, 2015, at Thursday, 1:05 PM, Jack Spitznagel >>>>> <[email protected] <mailto:[email protected]>> wrote: >>>>> >>>>> Hi Jim, >>>>> >>>>> Sounds vaguely familiar. Double check all devices to make sure the port >>>>> speed is set to 38,400 on all devices. >>>>> >>>>> I experienced this problem once. When I had the KX3/PX3/KXPA100 daisy >>>>> chained together and one of the speeds was not at 38,400 things went >>>>> brain dead just that way. >>>>> >>>>> Jack - KD4IZ >>>>> >>>>>> On 6/25/2015 12:37, James Bennett wrote: >>>>>> Have a KX3 and PX3 that have been working fine - until this morning. >>>>>> Today I am unable to have the KX3 connect to my computer if the PX3 is >>>>>> powered on. If I turn off the PX3, the KX3 serial - USB connections >>>>>> works fine. As soon as the PX3 is powered on, the connection goes away. >>>>>> I'm using Elecraft-supplied cables, not off-brands. The PX3 Utility >>>>>> cannot connect to the PX3 with the KX3 on or with it off. Other than the >>>>>> connection to my iMac being hosed, the PX3 and KX3 appear to be working >>>>>> just fine. >>>>>> >>>>>> Any suggestions how to determine what's going on? >>>>>> >>>>>> Tnx, Jim / W6JHB >>>>>> ______________________________________________________________ >>>>>> Elecraft mailing list >>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>>>> <http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>> Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm> >>>>>> Post: mailto:[email protected] <mailto:[email protected]> >>>>>> >>>>>> This list hosted by: http://www.qsl.net <http://www.qsl.net/> >>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>> <http://www.qsl.net/donate.html> >>>>>> Message delivered to [email protected] <mailto:[email protected]> >>>>>> <mailto:[email protected] <mailto:[email protected]>> >>>>> >>>>> >>>>> --- >>>>> This email has been checked for viruses by Avast antivirus software. >>>>> http://www.avast.com <http://www.avast.com/> <http://www.avast.com/ >>>>> <http://www.avast.com/>> >>>> ______________________________________________________________ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>> <http://mailman.qth.net/mailman/listinfo/elecraft> >>>> Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm> >>>> Post: mailto:[email protected] <mailto:[email protected]> >>>> >>>> This list hosted by: http://www.qsl.net <http://www.qsl.net/> >>>> Please help support this email list: http://www.qsl.net/donate.html >>>> <http://www.qsl.net/donate.html> >>>> Message delivered to [email protected] <mailto:[email protected]> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> <http://mailman.qth.net/mailman/listinfo/elecraft> >>> Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm> >>> Post: mailto:[email protected] <mailto:[email protected]> >>> >>> This list hosted by: http://www.qsl.net <http://www.qsl.net/> >>> Please help support this email list: http://www.qsl.net/donate.html >>> <http://www.qsl.net/donate.html> >>> Message delivered to [email protected] <mailto:[email protected]> >> >> >> >> >> David Ahrendts [email protected] <mailto:[email protected]> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
