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"merely a modification" ??? No disrespect intended - but if I could 'merely' write modifications like that I'd be Very pleased with myself !! Kind Regards Ross

Hi Neb, Very nice work - Many Thanks - Still learning how to use the VNA & this version of the interface software is very complete and should help a Lot :-) Thanks again . . Regds Ross

The two blue leds are connected to the ADF4350 and tell it is in lock. They will go off when the ADF4350 are powered down (aka scan stops before 140Mhz) There are two more leds on the PCB. One is to

Yes! This "calibrate 2 ch" version fixed my problem - thank you!! Really nice firmware - great job! Thank you for the fast support!

Hi DiSlord, *This one* seems to work! I was able to properly calibrate the small span range. Thank you for very much for the help!

And here is an excellent treatment of calculating the trap L/C values or ratio as mentioned in my prior post for an antenna dipole with a set of given physical dimensions.

Since there are now many flavors of NANO's out there but the ones that I have with the 4 red LED's on the side indicate the state of the battery charge. While charging all 4 will be on with one of

There is no need for that: dfu-util -d 0483:df11 -a 0 -s 0x08000000:leave -D build/ch.bin

Ok, in that case, you need to use the dfu manager utility that comes with DeFuSe to convert from hex to dfu. You'll find it in the stmicro folder in the Start menu on windows.? I think it's on PG 28

I guess this finally ends the usefulness of my 20MHz-2GC GR-1607A transfer admittance bridge! Maybe I will put it on the fireplace mantel!

Threshold setting of the Si5351? wrote:

HI DiSlord, This is what I have been doing. It seems that there are times that the source is turned off (or maybe at wrong frequency) when this happens. Does that give you a clue to what might be

Larry - I haven't been able to find a .dfu for this version.

Why not try edy555's June release of FW? On Thu, 1 Oct 2020 at 3:35 PM, Alan “W2AEW” Wolke<alan.wolke@...> wrote: Very strange.? I got the same bad result with this version too.?

Hi Ed, Hope this may help... The story of the antenna response and the trap response is best illustrated with the figures shown. All measurements can be done as a one port. So the S11 channel 0

Try this, in it for calibrate need 2x time, but i do some as on measure

you can made calibration in more big range After only change start/stop frequency (in most cases calibration interpolation work very good, now used 401 calibration points and get less errors)

Well, if it can do passable spectrum analysis as well, I will probably invest in one; I seem to be a glutton for these things (a nanovna, 3x V2 vnas and a tinysa so far, -oh, and a houseful of radio

Very strange. I got the same bad result with this version too. It's almost as if the source is not on when I reach the THRU calibration step. If I go back and repeat the THRU, it seems to sometimes

There is a very long thread on this group about this exact subject. I won't reiterate the consensus, but some NanoVNA manufacturers are going to be offering N connectors as a result. My post wasn't