I give up!
One month ago, I buil the proyect with firmware v1_mf05= It does not work.
I check all componentes=All OK include the diodes. Voltages, resistors, capacitors all OK.
Change the MCP6002 for one new and also change the DDS AD9860 = It does not work either
All readings SWR=999
Reading of serial monitor on a segment of the 2om band :
What checks can I do with an oscilloscope or a frequency meter?
73, Enio, EA2HW
I don't know if this is your problem but I had much the very same issue when I first build the Antenna Analyzer. The problem I had was that I inadvertently flashed it with the 3.3v board set. If you do that according to this Spark Fun Article :
you can brick the thing. I didn't brick it just crippled it. Totally bizarre output for no apparent reason and in my case the SWR was always 999 and the USB port wouldn't stay stable. Now the way you have to unbrick it is to hit reset twice and then try to upload it. The problem is it will only stay in boot loader for about 8 seconds before it starts to run the sketch again. I had to hit Command+U (I'm running a mac) to do the upload as I couldn't mouse fast enough while I pressed the reset button twice.
After doing that sequence about 10 times Reset+Reset and then Command+U I saw the red LEDS on the Arduino flash and then I saw that the sketch was loaded. Of course making sure I had selected 5.5V first 🙂 Now I have a serial port, no more funky characters on the display when I run only with a USB. Now I can send commands from the USB Port.
So might want to add a note, to be sure your running 5.5V Micro Pro as the effects of flashing the 3.3V on the 5V device seemed to be totally unpredictable and the default on my setup was 3.3.
Not sure if this will resolve your problem but just make sure you have the right voltage for the processor as it will save you hours of frustration later.
73, Don KC9ZMY