Alex Gibson wrote:

A few people are looking at turning one of the xilinx S3 (spartan3)
starter kits into spectrum analysers and logic analyser with a vga output.
http://www.xilinx.com/xlnx/xebiz/des...ey=DO-SPAR3-DK

http://www.fpga4fun.com/digitalscope.html
http://www.fpga4fun.com/board_flashy.html

Problem with a lot of the phone stuff is getting access to the chips pins
for programming
(if they had them in the first place).
Chips are factory programmed and not reprogrammable.

I really like the idea of an FPGA based spectrum analyzer. I have been
planning to put one together for a while and have started on
schematics. Rather than doing VGA output I am using USB to a PC. I
have the FPGA/DSP board up and running.

It will probably be some form of a dual conversion design with the
input signal being upconverted to an IF around 2GHz and then fed to a
quadrature demodulator.

One other really nice thing that can be done with a FPGA easily is a
Arbitrary waveform generator using block rams as a lookup table.

http://dlharmon.com/dspcard/adcdac.html

Darrell Harmon