Thursday, March 3, 2011

QRSS with a DDS-60

I have been having fun messing around with an old DDS-60 board that I obtained some time ago.  I have cabled it up to the Arduino.  Here is the setup:

The DDS-60 is plugged into the Arduino breadboard.   I have a small four line LCD display on a separate board below.  The LCD is certainly not necessary for this project, but is nice to have.

Looking at the DDS-60 output on around 10 MHz, we see a nice clean signal.
A little more code and we have a simple QRSS beacon putting out about 1.4 V peak-to-peak signal into a 50 ohm load.  Hooked up a simple Grundig G6 portable radio and cabled the audio out to the computer audio in.  Using Spectran, we can see the 6 hertz FSK signal on 10.140 Mhz sending my call sign (KO7M).
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2 comments:

  1. Kelley Maynard16 March, 2011 08:39

    Hi Jeff,

    Thanks for your post. I am working on a student project and we are trying to control a DDS-60 via Arduino. I am new to DDS and I have not found much information regarding the DDS-60 and Arduino combination. We just need to set 1 constant frequency and do not need to change the frequency in real-time with a control. Basically, we just need to write the bare minimum code to have the DDS-60 generate a set constant frequency at all times when there is power supply to the DDS-60 and Arduino. I'm wondering if you can give me some basic pointers on coding to control DDS-60 from the Arduino or even share some of your basic code with me. I will email this to you as well. Thanks in advance, Kelley

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  2. Jeff ko7m22 March, 2011 16:15

    Kelly,

    I hope my email response was useful to you in your project. Don't hesitate to contact me should there be any assistance I can render in the future.

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