Is there an on-board voltage regulator that converts 5.0V from the USB to whatever is used internally?
If so, what external voltage range could be used in lieu of 5.0V from USB (but through the USB connector) to power the nanoVna?
I'm thinking of 4 rechargeable NiMH cells which would be about 5.2V fully charged, and about 4.4V when they need to be recharged?
WA7ARK
