[Elecraft] USB Support - K3, K2?

[Joe Subich, W4TV]

> Although I've never tried it, it claims support for Macintosh 
> computers without the requirement of loading any new drivers.

Works very well with Chen's cocoaModem, uH Router and Don's MLDX. 
Both Chen and Don have done an excellent job in writing native 
support for all the microHAM interfaces. 

> Any chance that someone has any real-world experience as to the 
> clock accuracy of the sound card used in the external interface? 
> I.e. how far off is it on Rx and Tx?

Checks with MMTTY/MMVARI/MMSSTV consistently show zero error 
unless you try to "share" the sound chip between two applications 
with different sampling rates that are not integer multiples 
(e.g., 11025 and 48000 Hz).  

> I see they also claim Linux compatibility with this product, too.

The USB interface and USB Sound Device are industry standard devices 
for which drivers exist in most LINUX distributions. There are still 
some issues in writing applications to the microprocessor controller 
in DigiKeyer, microKEYER and microKEYER II (to be released the end 
of this month).  Chen's uH Router can probably be ported to LINUX 
using the named pipes interface if there were a developer interested 
in taking on the task. 

73, 

   ... Joe Subich, W4TV 
       microHAM America 
       http://www.microHAM-USA.com 
       http://groups.yahoo.com/group/microHAM 
       support at microham.com 
  


> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Rick Kunath
> Sent: Wednesday, August 08, 2007 3:27 PM
> To: Tom Miller
> Cc: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] USB Support - K3, K2?
> 
> 
> Tom Miller wrote:
> 
> > The DigiKeyer puts a high quality sound card OUTSIDE of the 
> computer, 
> > and also chats with your radio on serial or TTL.  It all 
> connects to 
> > your PC with a single USB (1.1 & 2.0) connection.  Although 
> I've never 
> > tried it, it claims support for Macintosh computers without the 
> > requirement of loading any new drivers.
> 
> Any chance that someone has any real-world experience as to the clock 
> accuracy of the sound card used in the external interface? 
> I.e. how far 
> off is it on Rx and Tx? I think MixW in Windows lets you 
> check that, or 
> MMSSTV.
> 
> I see they also claim Linux compatibility with this product, too.
> 
> I'd be really interested to see how the clock timing stacks 
> up on this, 
> i.e. if it's reasonably accurate both in Rx and Tx sample rates and 
> stable as to any error value.
> 
> Rick Kunath, k9ao