And 500MHz tested as well..

A project log for 4R4C - FPGA Radio Challenge

We have 4 Resistors, 4 Capacitors and 1 FPGA to make RADIO Receiver.

Antti Lukats • 03/30/2017 at 14:53•2 Comments

When I posted the challenge, assuming that the circuit works at frequencies 500 + MHz.

But I had not tested it.

Now I have, this is 500MHz signal received with the same 4R+4C lab setup I used for first tests at 3.5MHz.

SNR is not good, actually its really really bad, but hey this is hand soldered prototyp on prototyping board, and the 500MHz frequency is pretty hard to some dirty circuit soldered on generic protoboard. Also the R and C values are not at all optimal, I did not change them, as I only wanted to see proof of concept that it works.

So basically the same circuit can receiver from below 1MHz to 500+ MHz.

Previous log

Almost solved, stage #1

03/29/2017 at 06:39 • 0 comments

Next log

First proto setup

04/06/2017 at 17:51 • 2 comments

Discussions

Antti Lukats wrote 03/30/2017 at 16:59

No hints given, but as said in the challenge, the 4R + 4C + FPGA will create a Radio Receiver with frequency range from LF (below 1MHz) to 500+ MHz. This is possible even without changjng the R or C values. So really wide tuning range.

Are you sure? yes | no

Yann Guidon / YGDES wrote 03/30/2017 at 16:36

Are you digitizing at 4GS/s ?

Are you sure? yes | no

And 500MHz tested as well..

Almost solved, stage #1

First proto setup

Discussions

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