Today I got my WSPR beacon code running for the most part. I have the WSPR encoding all done and the Symbol transmission bits are complete. The setup is the same as for the previous post.
I added a WSPR mode to the controller software and can trigger the transmission manually at this point. Watching the received signal on Spectran, I can see the normal WSPR four tone pattern. The test however is can Joe Taylor's fine WSPR program decode what I am transmitting? I am happy to say the answer is yes! Click on the image below for a full size version that can be read.
I am using just a cheap Grundig G6 receiver which only has 1 KHz resolution on the dial. Since the entire 30 metre WSPR band is only 200 Hz wide, I used Spectran to set received audio tone to around 1450 Hz. With Joe Taylor's application set with a dial frequency of 10.138.700 this put me in the band. I then waited for an even minute to come around and pushed a button to initiate the WSPR transmission. As you can see above, it decoded just fine! Whoo hoo!
So, now I need to implement the RTC clock in order to have transmissions begin 2 seconds into even minutes and to implement the percent of the time the beacon is transmitting.
Geting close to having a software solution on breadboarded hardware. It will then be time to build a custom PCB hardware solution.