Eric Smith wrote:
> Ray Andraka wrote:
> 
>>Well, does this http://www.andraka.com/shortwave.htm demo project
>>count? I did it as a demo back in early 2003.  It worked surprisingly
>>well considering there is no analog front end.
> 
> 
> Very cool!  Any plans to publish more details of the design?
> 
> Best regards,
> Eric


I had been working on a chapter for it in my book.  I gave up the book 
project because I was finding I couldn't dedicate enough time to it.  I 
may eventually post more details on that page on my website.  I kind of 
want to avoid putting the whole thing up there and giving college 
students a ready-made project.

Ray Andraka wrote:
> Well, does this http://www.andraka.com/shortwave.htm demo project
> count? I did it as a demo back in early 2003.  It worked surprisingly
> well considering there is no analog front end.

Very cool!  Any plans to publish more details of the design?

Best regards,
Eric

Brian Davis wrote:

> Ray wrote:
> 
>>Well, does this http://www.andraka.com/shortwave.htmdemo project count?
>>  I did it as a demo back in early 2003.  It worked surprisingly well
>>considering there is no analog front end.
>>
> 
> 
>  FYI, TI now makes a nifty eval board for their ADS554x family
> that includes a 3S250E on board, about $300 USD, that makes for
> a great low budget 'SDR' platform:
> 
> http://focus.ti.com/docs/toolsw/folders/print/ads5547evm.html
> 
> 14-bit, 210 MSPS ADC
> XC3S250E with config flash
> expansion connectors for spare FPGA I/O
> 
> Brian


Cool!  That would have been nice to have back then.  I spent about $400 
between the burr brown eval and insight spartanII boards. Having the 
whole thing on one board would have been nice.

I did that design in about 3 weeks right before FCCM so that I'd have it 
for the demo night.  Had I had more time, I was planning to optimize the 
design some more so that I could get a frequency display on the LCD on 
the board and some sort of interface (I was thinking a computer mouse) 
to tune it so that I could do without the laptop.  I never got that far 
though.

MikeWhy wrote:
> "Ray Andraka" <ray@andraka.com> wrote in message 
> news:3RG%j.77$pa2.9@newsfe21.lga...
> 
>> MikeWhy wrote:
>>
>>> "austin" <austin@xilinx.com> wrote in message 
>>> news:futloc$6jf3@cnn.xsj.xilinx.com...
>>>
>>>> Keyboard?  Computer?  Morse?
>>>>
>>>> Yup, hams have made it to the 21st century.  Most hams use an ascii
>>>> keyboard to Morse code generator, so I can type as I am typing now, and
>>>> send the code (without mistakes).
>>>
>>>
>>>
>>> ....
>>>
>>> And to bring it back on topic, FPGA use in ham specific software 
>>> defined radio (SDR) is gaining ground and momentum. There's already 
>>> evidence of that here on this group.
>>>
>>> Mike.
>>> N9XI
>>>
>>
>> Well, does this http://www.andraka.com/shortwave.htm demo project 
>> count? I did it as a demo back in early 2003.  It worked surprisingly 
>> well considering there is no analog front end.
> 
> 
> Whoa. What's really impressive is there looks to be room left on that 
> -100 device for a HT and PSK decoder. Or is that block RAM showing in 
> the FloorPlanner?
> 
> 

Thanks. There are 6 of the Block Rams unused, and a few slices scattered 
around.   With some thought and a little more optimization work I'm 
pretty sure I could get a PSK decoder in there.  If I take out the 
programmable filters, I could do FM demodulation too (which doesn't need 
the programmable filters).  It was a fun project.  We had a good time 
with it at FCCM that year too, tuning broadcasts from Asia with a 
long-wire antenna strung out over the courtyard.

On Apr 24, 10:40 pm, krunal <krunal.c...@gmail.com> wrote:
> hi....I want to implement Sigma Delta ADC in Spartan 3E starter
> kit....i have implemented it as xilinx's xapp-155.....in ise it works
> well for 8 bit....but give problem for 16 bit.....When i open it in
> sysgen it now work.......actually in program the dac.v is
> included......i dont know how to open that include file in
> sysgen....please help........if any one have verilog or vhdl code for
> that please send me........and i want to interface the exeternal ADC
> also.....so please help me......

Hi Krunal,
I understood you.  English is a second language for me as well... Send
me the files or links to them and I can see if I can make any sense
for you... btw a tip... I would try to learn Mandarin instead of
perfecting English.
-sanjay

Ray wrote:
>
> Well, does this http://www.andraka.com/shortwave.htmdemo project count?
>   I did it as a demo back in early 2003.  It worked surprisingly well
> considering there is no analog front end.
>

 FYI, TI now makes a nifty eval board for their ADS554x family
that includes a 3S250E on board, about $300 USD, that makes for
a great low budget 'SDR' platform:

http://focus.ti.com/docs/toolsw/folders/print/ads5547evm.html

14-bit, 210 MSPS ADC
XC3S250E with config flash
expansion connectors for spare FPGA I/O

Brian

"Ray Andraka" <ray@andraka.com> wrote in message 
news:3RG%j.77$pa2.9@newsfe21.lga...
> MikeWhy wrote:
>> "austin" <austin@xilinx.com> wrote in message 
>> news:futloc$6jf3@cnn.xsj.xilinx.com...
>>
>>> Keyboard?  Computer?  Morse?
>>>
>>> Yup, hams have made it to the 21st century.  Most hams use an ascii
>>> keyboard to Morse code generator, so I can type as I am typing now, and
>>> send the code (without mistakes).
>>
>>
>> ....
>>
>> And to bring it back on topic, FPGA use in ham specific software defined 
>> radio (SDR) is gaining ground and momentum. There's already evidence of 
>> that here on this group.
>>
>> Mike.
>> N9XI
>>
>
> Well, does this http://www.andraka.com/shortwave.htm demo project count? I 
> did it as a demo back in early 2003.  It worked surprisingly well 
> considering there is no analog front end.

Whoa. What's really impressive is there looks to be room left on that -100 
device for a HT and PSK decoder. Or is that block RAM showing in the 
FloorPlanner?

MikeWhy wrote:
> "austin" <austin@xilinx.com> wrote in message 
> news:futloc$6jf3@cnn.xsj.xilinx.com...
> 
>> Keyboard?  Computer?  Morse?
>>
>> Yup, hams have made it to the 21st century.  Most hams use an ascii
>> keyboard to Morse code generator, so I can type as I am typing now, and
>> send the code (without mistakes).
> 
> 
> ....
> 
> And to bring it back on topic, FPGA use in ham specific software defined 
> radio (SDR) is gaining ground and momentum. There's already evidence of 
> that here on this group.
> 
> Mike.
> N9XI
> 

Well, does this http://www.andraka.com/shortwave.htm demo project count? 
  I did it as a demo back in early 2003.  It worked surprisingly well 
considering there is no analog front end.

"austin" <austin@xilinx.com> wrote in message 
news:futloc$6jf3@cnn.xsj.xilinx.com...
> Keyboard?  Computer?  Morse?
>
> Yup, hams have made it to the 21st century.  Most hams use an ascii
> keyboard to Morse code generator, so I can type as I am typing now, and
> send the code (without mistakes).

....

And to bring it back on topic, FPGA use in ham specific software defined 
radio (SDR) is gaining ground and momentum. There's already evidence of that 
here on this group.

Mike.
N9XI

Symon,

I sometimes feel impatient, and react poorly to posts where 10 minutes
with Google, and the poster would have their answer.

However, I feel that we should all be patient.  We were all ignorant at
one time.

There is no supported forum for students, and those wishing to learn
about FPGAs.  One of their only resources is this newsgroup.

As for semaphores and Aldiss Lamps, no, I am not proficient in either.
But we did use an AM modulated laser pens one field day to communicate a
few Km between hilltops (with 1 cm^2 solar cell demodulators).

Austin