[Ham-Mac] Need Ideas on USB-Serial Problems

[David Anderson GM4JJJ]

Steve,

I know I have hit comms problems before with the Keyspan apparently  
locked up and no data going out, though the ports did appear to be  
there. The solution was to power down the iMac completely and restart  
it. Might be worth a try.

Have you tried removing all other un-necessary USB devices ?

Let us know how you get on, it is a bit of a mystery.


On 15 Dec 2007, at 22:56, Steve Muncy wrote:

> Hi, David....
>
> Unfortunately I don't have a RS-232 test dongle, but I'm darn sure  
> thinking about acquiring one now!!!
>
> I tried using a Belkin USB hub last year and gave up in disgust. The  
> Keyspan converters just didn't like it, so I started plugging in the  
> converters to the back of the  iMac last year and they worked  
> perfectly until this latest switchover. I'm thrilled to know that  
> Don Agro has had some good experiences with recent ones, however,  
> and will give those a try after (if) I get this system working again.
>
> I've received a few comments direct that indicate some people may  
> have been confused over some aspects of my problem, so I'll summarize:
>
> - I don't blame the software since I know it works;
> - I don't blame Leopard because this doesn't work using 10.3.9 on  
> another system;
> - I don't blame the cables because they work fine with my TNC;
> - I don't blame the Keyspan converters because all three of them  
> work with the TNC;
> - I don't blame the iMac since I now have the same problem on a  
> PowerBook.
>
> The only thing that seems common to everthing is the Keyspan  
> drivers, but I don't think I can blame them because others are using  
> them successfully in the same configurations as mine.
>
> I'm running out of things to blame!!!   ;-)
>
>
> Steve, NI5V
> ni5v at arrl.net

73
___________________________________________________________________________
David Anderson, GM4JJJ         E-mail: david at gm4jjj.co.uk
___________________________________________________________________________
Rotator Sales: http://www.braeside.plus.com
MoonSked software: Tracking, Prediction, Scheduling and much more.
Available for Linux, Windows or Macintosh. Also PalmTrack for Palm OS.
http://www.gm4jjj.co.uk/MoonSked/moonsked.htm
iDXSpot: Macintosh & Linux DX-Cluster Telnet access made easy!
Mac HP GPS Control: HP Z3801A Time & Frequency Standard software