This video describes the basics of how to protect the sensitive NanoVNA when making SWR measurements.
For those wanting to discuss this video, I started a thread. Feel free to make use of it.
https://www.eevblog.com/forum/rf-microwave/nanovna-input-protection/
If you are interested in seeing how I characterized the small grill starter, watch the first part of this video:
https://www.youtube.com/watch?v=1kYcY2ogmqo
The latest documentation and software may be found here:
https://github.com/joeqsmith/NanoVNA_V2Plus
If you have comments or suggestions on the documentation, feel free to leave them on the EEVBlog site at:
https://www.eevblog.com/forum/rf-microwave/nanovna-custom-software/msg3304902/#msg3304902
Characterizing crystals
https://www.eevblog.com/forum/rf-microwave/fun-with-crystal-filters/?PHPSESSID=lnr626eqefd2d4ah3el0jeiat2
Attenuators
https://www.eevblog.com/forum/projects/20db-rf-attenuator-seeking-feedback-to-improve/msg2898698/#msg2898698
My review for the NanoVNA V2 Plus 4 (demonstrates the new software as well)
https://www.youtube.com/watch?v=XaYBpPCo1qk
HCXQS Group's Tindie store
https://www.tindie.com/products/hcxqsgroup/4-nanovna-v2-plus4/