RS232 troubles
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Hi there,
I have following problems with my RS232 K2 connection: On a desktop PC with WIN7 everything working OK, all COM ports including USB/COM adapter running without any issue. When I am reconnected same USB/COM adapter with the same cable (between K2 and adapter) to the USB port on laptop, no communication. Of course the driver in laptop is installed and from the utilities and hardware control looks all OK. USB ports on laptop are working (checked with USB flash). All parameters on the COM port are the same as on desktop PC. I am on the end of my knowledges now, any help? Karel, OK2FD ______________________________________________________________ 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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You may need to use a powered hub
Many laptops do not put out enough of a level to work properly From: Karel Karmasin <[hidden email]> To: [hidden email] Sent: Wednesday, February 18, 2015 11:03 AM Subject: [Elecraft] RS232 troubles Hi there, I have following problems with my RS232 K2 connection: On a desktop PC with WIN7 everything working OK, all COM ports including USB/COM adapter running without any issue. When I am reconnected same USB/COM adapter with the same cable (between K2 and adapter) to the USB port on laptop, no communication. Of course the driver in laptop is installed and from the utilities and hardware control looks all OK. USB ports on laptop are working (checked with USB flash). All parameters on the COM port are the same as on desktop PC. I am on the end of my knowledges now, any help? Karel, OK2FD ______________________________________________________________ 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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Dimly powered USB connectors are as common as nails in computer land.
It's a favorite cheap, cheap trick by the bulk manufacturers, where even pennies multiplied by a million units is a lot of money. I have had that kind of problem in just about every PC, laptop I ever bought. Follow Harry's advice: Powered hub. 73, Guy. On Wed, Feb 18, 2015 at 12:15 PM, Harry Yingst via Elecraft <[hidden email]> wrote: > You may need to use a powered hub > Many laptops do not put out enough of a level to work properly > > > From: Karel Karmasin <[hidden email]> > To: [hidden email] > Sent: Wednesday, February 18, 2015 11:03 AM > Subject: [Elecraft] RS232 troubles > > Hi there, > > I have following problems with my RS232 K2 connection: > On a desktop PC with WIN7 everything working OK, all COM ports including > USB/COM adapter running without any issue. When I am reconnected same > USB/COM adapter with the same cable (between K2 and adapter) to the USB > port on laptop, no communication. Of course the driver in laptop is > installed and from the utilities and hardware control looks all OK. USB > ports on laptop are working (checked with USB flash). All parameters on > the COM port are the same as on desktop PC. I am on the end of my > knowledges now, any help? > > Karel, OK2FD > ______________________________________________________________ > 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] 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 Karel Karmasin
I'm not sure what to tell you to try next.
Some laptops just don't supply enough voltage to work well with RS-232 From: Karel Karmasin <[hidden email]> To: Harry Yingst <[hidden email]> Sent: Wednesday, February 18, 2015 1:10 PM Subject: Re: [Elecraft] RS232 troubles Tried two different USB to RS232 adapters (both working on desktop PC). Dne 18.2.2015 v 18:47 Harry Yingst napsal(a): You could try a different USB to RS-232 adapter. From: Karel Karmasin <[hidden email]> To: Harry Yingst <[hidden email]> Sent: Wednesday, February 18, 2015 12:29 PM Subject: Re: [Elecraft] RS232 troubles Hi Harry, just tried usb powered hub - still the same, no success. Tried also PCMCIA RS232 card - same problem. Karel Dne 18.2.2015 v 18:15 Harry Yingst napsal(a): You may need to use a powered hub Many laptops do not put out enough of a level to work properly From: Karel Karmasin <[hidden email]> To: [hidden email] Sent: Wednesday, February 18, 2015 11:03 AM Subject: [Elecraft] RS232 troubles Hi there, I have following problems with my RS232 K2 connection: On a desktop PC with WIN7 everything working OK, all COM ports including USB/COM adapter running without any issue. When I am reconnected same USB/COM adapter with the same cable (between K2 and adapter) to the USB port on laptop, no communication. Of course the driver in laptop is installed and from the utilities and hardware control looks all OK. USB ports on laptop are working (checked with USB flash). All parameters on the COM port are the same as on desktop PC. I am on the end of my knowledges now, any help? Karel, OK2FD ______________________________________________________________ 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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