[hpsdr] Further thoughts on the Phoenix RX/TX architecture

[ecellison at comcast.net]

Folks
Add my vote to excellent. That IS what this group is all about.
Eric


-------------- Original message -------------- 
From: Bob McGwier <n4hy at idaccr.org> 

> ***** High Performance Software Defined Radio Discussion List ***** 
> 
> I absolutely agree completely with Alberto. The cost difference 
> between what has been proposed for Excellent performance and good 
> performance is not sufficient (the same?) to justify doing anything 
> other than excellent. Others are taking the risk of doing the tests on 
> these potential mixer circuits so there is no risk to the overall 
> projects ultimate outcome. 
> 
> 
> Two more cents, 
> Bob 
> N4HY 
> 
> 
> 
> Alberto I2PHD wrote: 
> > ***** High Performance Software Defined Radio Discussion List ***** 
> > 
> > Ray Anderson wrote: 
> > 
> >> ................. 
> >> Phoenix was intended to have “Good” performance (much better than 
> >> adequate, but less than world-class). The goal was to design a 
> >> relatively low-cost entry level integrated HF TX/RX board that will plug 
> >> into the ATLAS backplane and work with the Janus and OZY boards to 
> >> achieve a vehicle that allows one to get ‘on-the-air’ with a minimum of 
> >> fuss. 
> >> ................. 
> >> At this point in the genesis of the Phoenix design we need to make some 
> >> early decisions on which fork to take: a design utilizing Janus/OZY with 
> >> ‘Good’ performance, or a design using an integrated ‘Janus/OZY’ hybrid 
> >> interface that has the potential for ‘Excellent’ performance. 
> >> 
> > > ................. 
> > 
> > If the "Good" performance route will be chosen, a route that will require both 
> the Janus and the OZY cards, which will 
> > be the plus side of that choice ? We know already what the minus side is, a 
> reduced performance compared to the Horton 
> > card, but what about the advantages ? IMHO, the only advantage will be a small 
> reduction in cost/price. Can this 
> > reduction be put down in numbers ? I don't think it will be significant, so 
> the "Good" way, as opposed to the 
> > "Excellent" one, doesn't look as being much justifiable. Just my two cents. 
> > 
> > 73 Alberto I2PHD 
> > 
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> > 
> 
> 
> -- 
> Robert W. McGwier, Ph.D. 
> Center for Communications Research 
> 805 Bunn Drive 
> Princeton, NJ 08540 
> (609)-924-4600 
> (sig required by employer) 
> 
> 
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