I recently purchased a nanoVNA-H4 model from R&L Electronics. I am attempting to place the VNA in download mode to flash new firmware. The Config menu shows no such "DFU" option. As such, I'm assuming this model requires a two-pin header jumper on the main PC board. Questions:
1) Am I correct in assuming this model requires me to jumper the header pins on the PC board?
2) Once the new firmware is downloaded and functioning, will the latest firmware have a "DFU" menu option under Config so that a hardware jumper won¡¯t be necessary in the future?
Paul, W9AC
Paul Christensen