Many drone users, nowadays, use a drone signal booster, and this type of external amplifier, once used, has an actual signal that is much higher than the displayed output signal. Not sure if DJI will launch their own amplifier module in the future, and if this is a possibility, perhaps they will take this into account when adding the signal display feature. Off topic, right now there are only third party options for external signal amplifiers. For example,Better Signal™'s A3D drone signal booster.