I went through a series of test using the instructions provided by Bruns for hanging the frequency.

When i placed 3 of the four AX5043 devices on 145.840 MHz I could mostly only copy signals on Device 2. Occasionally Device 3 would come through also but it is supposed to be set on 145.870 MHz.

Then I placed all four devices on 145.840 and again mostly only Device 2 is copied but occasionally Device 3 would be copied.

Then I moved the frequency setting on device 2 and 3 off of 145.840 to 145.890. At that point occasionally Device 3 would copy the signals.

Using a spectrum analyzer I checked the signal coming into each one of the AX5043 inputs and found the levels to be about the same on all devices.

May need to do more testing by forcing interrupt on the parts not responding if possible. I think I recall Chris indicating he did see interrupts coming back from all four devices.

With the AX5043 devices all set at 145.840 I see different values in the PLL registers. This seems odd to me.

I am attaching logs for my testing this morning.

I plan to spend some time looking over the layout for each AX5043 to make sure they all match except for Device 2.

When I first started this morning the frequency for one of the devices was 145.860 MHz. I did change the values in config.h file and I had issues an "init new proc" and a "pre flight init" yesterday trying to get the config.h frequencies in place.

There are some minor issues which may be addressed later but not a problem on debug. There may be a bug in the AX5043 code however.

Bob


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