[Elecraft] [KX3] ADC/DAC access, keyer input

[Don Wilhelm]

Phil,

Is there an existing software application that would accept such a 
digital stream over USB?
Yes, I know that is what logically happens when using a USB soundcard, 
but all the applications I know about require that the soundcard be 
defined - I for one am not up to writing my own application to process 
that digital stream.

73,
Don W3FPR

On 8/19/2011 11:37 AM, Phil Hystad wrote:
> Actually, I can see how Elecraft might consider making their own separately boxed sound card interface to do what the original requestor wanted to do.  That is, take in the I/Q signal, digitize via the sound card, and present a USB interfaced digital number stream to the computer.
>
> So, Elecraft can do this but would they.  I am thinking if they are smart about business they would not bother.  I mean, who is going to buy this "box" when they have a sound card already built into their computer that would likely do the same job.  Or, there are a myriad of other external high-quality sound cards you can buy to do this job.
>
> Or, am I missing something -- easy to miss something because I am not sure I understood the purpose in the original question.
>
> Personally, I want my KX3 just the way that Eric and Wayne make it since they seem to be smart about this sort of thing.
>
> 73, phil, K7PEH
>
>
> On Aug 19, 2011, at 8:26 AM, Christian KJ4VPK wrote:
>
>> Sound card USB chips are tiny... Plenty of them, too. Volume cost is very very low, too.  Making it an optional feature if it really breaks the bank..
>>
>> Not needing shielded analog cables seems like a beautiful thing.
>>
>> -----Original Message-----
>> From: Don Wilhelm
>> Sent: Friday, August 19, 2011 10:55 AM
>> To: gmaxwell
>> Cc: elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] [KX3] ADC/DAC access, keyer input
>>
>> I believe what you are asking for means full soundcard function in the KX3.
>> That does not seem reasonable to me.
>> Why should others who do not desire that internal function have to pay
>> for it?  There are many (I would even say most) who want the KX3 for
>> portable use (without dragging along a computer for a panadapter
>> display), and that is its major design point as far as I can determine.
>>
>> Your "trickle charge" suggestion means a voltage booster circuit would
>> have to be added, and many of them generate RF hash.
>>
>> Besides, I don't think there is room inside the KX3 for those things you
>> are asking.  We are approaching the "Dick Tracy wrist radio" in the KX3
>> - how much smaller can it get?  Many complain about the size of the K3
>> buttons!
>>
>> 73,
>> Don W3FPR
>>
>> On 8/19/2011 10:15 AM, gmaxwell wrote:
>>> Tony Estep wrote:
>>>> IF output connected over USB? Maybe you mean a BNC,
>>>>
>>> No. I mean USB, as in digital output, as is found on the USRP (for example).
>>>
>>> I see no attraction in yet another analog step that is only going to add
>>> noise and interference, complicate PTT and control signaling,  and leave me
>>> with a mess of more cables and boxes in order to interconnect it.  (What
>>> netbook has stereo inputs? what netbook has inputs that aren't full of
>>> spurious tones from the computer?)
>>>
>>> Conceivably the KX3 could be trickle charged (500ma at 5v) via a USB client
>>> connection, meaning a complete computer-enabled mobile station could be
>>> [antenna]-[kx3]-[netbook]-[power] which would be clean indeed.
>>>
>>>
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