I have 2 tinySA2.8. One works fine, and the second often lights up the indication of the red letters "AM".
In this case, the measurement mode is DISABLED.
From observations:
In the absence of a signal, "AM" does not indicate.
When a signal is applied with a level of -25 dBm (35.6mVp-p), the red "AM" appears when the menu is called and does not turn off until the input signal is removed.
Without calling the menu, this indication appears when the amplitude is sharply increased to the upper edge of the display.
After removing the signal from the input, the red "AM" continues to be displayed until any menu call.
The same is true when a signal is applied with a level of -30dBm (20.1mVp-p).
What does this mean and how to solve it?
I attach screenshots from normal and problematic devices in the same conditions:
??
