1. In playing with my NanoVNA-H4, I got to the point where I felt I should just reset to original settings and start over. I found that simply re-flashing firmware was not enough to reset the device...at least not re-flashing the same firmware version that had previously been installed. Doing this resulted in no change to my messed up settings. I needed to flash an earlier version of firmware, then flash again with the target version, before the unit appeared to go back to the original state. So, if you are hoping for a complete reset, keep this in mind.
2. I was trying out the NanoVNA Saver 0.3.8 software, and for some reason the software was resetting the NanoVNA back to 101 sweep points (DisLord's firmware allows up to 401 sweep points).The NanoVNA Saver software would state that 401 Sweep points were being used, but the display on the Nano would say 101. I couldn't figure out how to fix this, and this was the main reason I decided to reset the firmware. Perhaps this was just due to some messed-up configuration I had incurred.
3. Question: Does the calibration offered in the NanoVNA Saver software do exactly the same thing as running the calibration from the NanoVNA itself? I've read conflicting info about this-- some sources say the calibration is the same, others say it is better to calibrate directly on the NanoVNA.
4. Related question: Is it necessary to re-calibrate for each band and save those calibration settings to a separate memory slot (Slot0, Slot1, etc.? Again, I read different things -- I thought it WAS necessary to recalibrate for each band, but in the NanoVNA Saver software documents it says "A calibration of both ports across the entire frequency span, saved to slot 0, is sufficient." S I am now unsure about this. If I want to measure SWR and impedance for a variety of antennas in the HF 80m to 6m range, would one calibration from 80m-6m be sufficient (saved to one slot), or should I calibrate each band separately into the 5 available slots (such as 80M->Slot0, 40m->Slot1, 20m->Slot2, 10m->Slot3, 6m->Slot4)?
It's actually pretty fun to figure this little device out.
