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[aprssig] APRS SDR

Derek Love DLove at app-tech.co.uk
Tue Dec 14 09:12:50 UTC 2010


quote: "...a price in the less than kilo-dollar range"

splutter, splutter... well that puts it way, way out my reach then! I can
buy a car for less than that! If I spent that much on a radio, it would be
instant divorce!

Derek Love, Applied Technology UK
+44 1749 881130


-----Original Message-----
From: Jeremy McDermond [mailto:mcdermj at xenotropic.com]
Sent: 13 December 2010 21:54
To: TAPR APRS Mailing List
Subject: Re: [aprssig] APRS SDR


On Dec 12, 2010, at 8:05 AM, Matti Aarnio wrote:

> Having a special SDR hardware that takes application bits in on one end,
> and puts IF/RF waveforms out on other is usually seriously more expensive
> approach.  A mid-scale Xilinx Virtex-IV, and 100 Msps ADCs/DACs does cost
> several kilo-dollars, or more commonly tens of kilo-dollars.

It's not that bad.  The OpenHPSDR project is using the following parts:

LTC2208 (130 Msps 16-bit A/D converter): $130
AD9744 (210 Msps 14-bit D/A converter): $12.68
Altera EP3C40 (39600 gate Altera FPGA.  Largest leaded array available from
Altera):  $78.50

Those are prices from DigiKey today.  The current OpenHPSDR system in
totality is in the low kilo-dollars range.  One of the new designs should
hopefully bring a price in the less than kilo-dollar range.

> 73 de Matti, OH2MQK

--
Jeremy McDermond (NH6Z)
Xenotropic Systems
mcdermj at xenotropic.com




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