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The internal LiOn battery (if connected) is like 3.7 to 4.2V. It is normally charged from externally-supplied USB 5V. This suggests to me that the innards run on something less than 3.7V (most likely

You must have a very cheap source of the ADF4350 since MAX2871 is just around 8 USD. Which RF switch do you use to switch between the si5351 and the ADF4350? Most switches are not specified below a

Could always try! But it's not first on the wishlist. I'll keep this thread linked on the backlog :-) -- Rune / 5Q5R

so - this is something that Rune might be able to add to his 'Saver application?

Oops, This was not meant to be sent to the list, but privately to someone who emailed me on the subject. Anyway, I stand by what I said 1) Return loss should be positive for passive components. 2) I

Yes, I am G8WRB. The problem is return loss is *often* used as a negative number in professional academic publications. This one from an IEEE, has a particularly amusing title; Low-Return-Loss Printed

From my limited understanding of the Y factor noise measurement you only need to measure power ratio in a not so critical frequency band. Correct? If yes. The CH1 input can function as a power meter

return loss is (almost always) a positive number. If one insists on negative numbers, just call it s11 (or s22). In essence the same property, but negative. Op 4-10-2019 om 17:20 schreef Ron Spencer

I think folks here are reporting 2-4 hours depending on the size and age of battery.I hear units come with 300mAH up to 450mAH batteries.? YMMV

No, "Demo" may be an historic artifact from the original author. STM makes the software freely available to encourage use of its STM32 technology. Yes, but you need that only if some other firmware

HOWEVER: The frequency steps on the NanoVNA are quite large depending on the settings. Now, with that said, maybe Rune can create an SA NanoVNA-Saver offshoot application that would perform

How much run time should I expect from the standard battery?

Hi Bruce. I see no one replied so I will make some noise! Pun intended. What FUN. Apparently some folks have considered placing the VNA into a spectrum analyzer (SA) mode. Hence, with some care you

Thanks!

Rudi, thank you very much for your kind comments :-) -- Rune / 5Q5R

Hi David, your suggestion of interfacing with the HP 8753 is certainly interesting! I am going to have the code reworked at some point to accept more VNA types, so an 8753 option isn't completely

NO YES NO Same as DMR-CLEAR_MEMORY_DFU.dfu NO NO

Really good! Congratulations for your job. I read it well tomorrow morning. Thanks

Hi David, thanks for the list! That's a lot of ways to display the same couple of numbers ;-) But I'm sure all very useful. I'll keep it around for future reference :-) -- Rune

I collected some of this information near the top of Firmware Versions http://ormpoa.altervista.org/firmware.htm .. which is at the bottom of Wiki Main Menu page /g/nanovna-users/wiki