Re: [linrad] Re: USB peripheral Radio

[Richard Hosking <richardh@xxxxxxxxxxxxxxxx]

Yes, this is what I am thinking. A PCB for this part should not be too 
difficult(?!), though it is not a trivial undertaking. The AD9874 is a 
0.5mm 48 pin TQFP part - I have done the AD9854 successfully by hand, 
which is an 80 pin device with 0.63 mm pin spacing.
It would be a simplification from the current hardware  setup, though it 
would not achieve the dynamic range that Leif has done. However, 
bandwidth should be better, and you wouldnt need an expensive sound 
card. I agree the best port would be USB if someone could do the 
software. Of course there would have to be a USB interface  also, but 
this could be done on board.
Any takers?

Richard



Alberto di Bene wrote:

> Richard Hosking wrote:
>
> >   baseband bandwidth of up to 270 KHz with I/Q serial data output.
>
> I think you are not meaning that those 270 kHz should be sent to the 
> serial port
> of the PC, are you ? An USB1.1 or USB2 interface would be much more 
> appropriate,
> IMHO. Given your capabilities in preparing PCBs and kits, why don't 
> you take into
> serious consideration a kit with the AD9874 ?
> The availability of the hardware part would be an incentive for the 
> software writers,
> I am sure.
>
> 73  Alberto  I2PHD


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