[Elecraft] K3 - Intermittents serial disconnect problem

[Tom]

As Dick mentioned this is the most likely reason.  There is another power 
management setting that should be checked and disabled as well.  Open the 
device manager, and expand Universal Serial Bus Controllers.  In there there 
will entries such as Generic USB  Hub, USB Root Hub and each of these will 
also have power management settings.  It is best to disable power management 
there as well.
73 Tom

va2fsq.com

-----Original Message----- 
From: Mike Murray
Sent: Wednesday, June 28, 2017 12:46 PM
To: Dick Dievendorff ; elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 - Intermittents serial disconnect problem

Dick,

Thanks for the suggestion!  I've checked mine and it's set to disabled like
yours.

On to the other suggestions!
73, Mike

On Wed, Jun 28, 2017 at 11:37 AM, Dick Dievendorff <dick at elecraft.com>
wrote:

> Sometimes PC USB devices can go to sleep based on lack of activity.  The
> detail may vary by operating system version, but my Control Panel applet
> "Power Settings", Power options, advanced settings, USB settings, USB
> selective suspend setting.  I've disabled USB suspend.
>
> I don't know that this is the problem you're having, but it's one
> possibility.
>
> 73 de Dick, K6KR
>
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Mike Murray
> Sent: Wednesday, June 28, 2017 08:58
> To: Elecraft at mailman.qth.net
> Subject: [Elecraft] K3 - Intermittents serial disconnect problem
>
> I've been experiencing a strange problem with my K3 and have been
> unsuccessful in isolating the cause.  At times it just loses the serial
> connection to the PC and the K3 must be power cycled to restart the
> connection.  It happens both during active contest logging as well as when
> sitting idle - the connection just stops.  I've tried several logging
> applications with the same results.
>
> At first I thought it might be related to the PigKnob I have between the
> serial port and K3, but running the serial cable direct resulted in the
> same
> problem.  I've also seen the problem using a different PC with an Elecraft
> serial to USB cable for the connection.
>
> Indications are that a problem might exist in the K3, but I can't envision
> why it would work flawlessly for some random period and then fail.  Any
> ideas for further troubleshooting? I've entertained updating to the
> KIO3BUPKT KIO3B Upgrade Kit, but don't know that the extra expense would 
> be
> worth a try.
>
> 73,
> Mike - W0AG
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