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Re: [Discuss-gnuradio] hi from new subscriber
From: |
Jamie Morken |
Subject: |
Re: [Discuss-gnuradio] hi from new subscriber |
Date: |
Sun, 09 Jun 2002 00:17:39 -0700 |
Hi John,
> It would be great to have readily available hardware that would
> suit the needs of software-defined radio experimenters. But
> a "custom board" would not be particularly useful. We'd have
> great free software that could be used by thousands or millions,
> but only two or three individual boards to use it with.
>
> If you would build a board that someone would reliably produce and
> support and sell to anyone who wanted it, that would be what we really
> need. Then we could discuss what ought to be on such a board.
Perhaps I was unclear when I said "custom board". I agree
having hardware like this widey available is necessary for your project
to be a success.
I have contacts where I can get boards made and assembled for
very reasonable prices reliably and on demand. I just send the
printed circuit board files and a bill of materials and they send back
assembled boards for a reasonable price. I know any useful board
would probably have a processer, fpga, high speed DAC, high
speed ADC, low noise amplifier and a power amplifier but don't
know the details of what is wanted (like size of fpga required,
type of processer required etc. etc..)
The manufacturer I deal with for my board production is Olimex ltd.
http://www.olimex.com/pcb/index.html
Let me know what you want in a board and I will try to make it.
Does the ADC/DAC interface right to the amplifiers or is there an
analog modulation/demodulation so that the ADC/DAC interfaces
to the image frequency? Can you make a flexible protocol radio
if you modulate the carrier wave with analog electronics?
Obviously you will have to use some analog modulation/demodulation
for carrier frequencies over 100Mhz or so.
Here is a 200MSPS 8 bit ADC
http://www.national.com/pf/AD/ADC08200.html
Here is a 135MSPS 14 bit DAC
http://www.national.com/pf/DA/DAC14135.html
cheers,
Jamie Morken