I did some housekeeping last weekend on the files and it appears I went one step to far and don't have the latest version of the software. I'll pull it down tomorrow. The version I have sets the 0x0020 which is very low. Max power is 0x0fff.

Remember the range is not linear.

Congrats

Jim

One more point… Max power 16 dB would with 5V and we are using 3.3v on the AX5043.

On Feb 16, 2024, at 9:25 PM, Bob Stricklin via pacsat-dev pacsat-dev@amsat.org wrote:

I did test a board today and found it was transmitting every 30 seconds with a power level of about -28 dBm.

I spent some time looking at the code and found where the power level is set to ox0d in a config file and get AX reports this value.

I see in the data sheet for AX5043 where power should range from -10 dB to 16 dB and uses a 12 bit value to set the level. Possibly we are just adjusting upper 8 bits.

We will also be losing power in the differential to single ended converter and shaping circuit. I will probe on this a little more tomorrow but likely just leave it alone and move on for now to be sure and ship boards Monday.

I also see the 30 second interval in the code and some other comments about setting power but does not seem like this is being used.

I could not get a continuous tone and I did not spend time setting up a tight loop to transmit.

I did change the call sign in the configuration to mine.

Bob

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