The power meter applies Icom's own meter calibration (raw 143 = half
deflection, 213 = full scale) anchored against the real radio: a measured
100 W sits at half deflection of the 7760's 250 W face — the linear guess
showed it as 140. The RF power slider says watts on a 200 W rig instead of a
percentage the operator has to convert.
And the Listening button, pressed while a network Icom is connected, restarts
the monitor render-only: it used to open a USB capture from the From-radio
device as well, and that second producer interleaved with the network pushes
chopped the audio to pieces.