[Elecraft] OT QRP: Low Power QPSK experiment Advice sought

[Lynn W. Taylor, WB6UUT]

He's talking about 1 megabit to 5 megabit data rates.

Not going to do more than a few kilobits with a sound card.

-- Lynn

On 3/27/2014 6:17 PM, Don Wilhelm wrote:
> Neil,
>
> If you are going to operate digital modes, you have a perfectly good 
> way to generate the digital stream.
> It is the computer soundcard and the application that you will be using.
> The computer soundcard is good for generating anything in the audio 
> range.  There are several software applications that will produce 
> several types of audio waveforms.  A web search will reveal several of 
> them.
> But for your purposes, I would think that the software application 
> that you intend to use to generate the digital signal would be the 
> best thing to use.
>
> 73,
> Don W3FPR
>
> On 3/27/2014 7:41 PM, Niel Skousen wrote:
>> Good Evening All,
>>
>> This is low power, just not strictly QRP operating.  I'm looking for 
>> input and advice ** off the list **
>>
>> I'd like to do some experiments with QPSK and GMSK at 450 - 900 MHz, 
>> and looking for advice on howto inexpensively do so since I dont 
>> have  digital modulation signal generator.   I'd like to look at some 
>> modulation sideband effects at +/- 5x the modulation frequency.    
>> Ideally I'm looking at 5Mbps QPSK, but lower bandwidths (~1Mbps) 
>> might work for me as similar answers to my question ( interference 
>> suppression ).
>>
>> I have an HP 8921 for Spectrum analysis and a decent scope, but no 
>> good way to generate and decode the digital stream.
>>
>> Any thoughts for on-the-cheap approach would be appreciated (eval 
>> kits etc)
>>
>>
>
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