Another way to test this is to disconnect the display altogether.? This can't be done with the existing software as the code will hang trying to start the RA8875 object.? However, in developing the T41 Beacon Monitor, I created a version of the T41 software that doesn't update the display, though the RA8875 object was still there to display the Beacon Monitor.? With a bit of work, I separated that portion of the display code as well.? I can now completely disconnect the display.? It's not too hard to print the S-meter value to the serial monitor, but controlling the radio without a display is a bit of a guess.? That's where my comes in handy.?
With that I see a 10 to 20 dB reduction in the noise floor on the upper bands of the 4SQRP without its 5" display.? This seems consistent with the results that John posted.
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I need to repeat this with my v12.
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