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Calibration bug in newer firmwares?
Could someone repeat my tests? I have described the issue here: https://github.com/ttrftech/NanoVNA/issues/45 Carlos
By Carlos Cabezas · #3029 ·
Experimental 256 point FFT Firmware
XENOMORPH, who I believe first introduced the 1500 MHz, tdr, and battery icon firmware mod, has just released a firmware mod that adds additional 256 point FFT capabilities versus the current 128
Re: R + jX ?
Yeah, I thought that would do it as well, BUT it gives reflection coefficient. Alan
By alan victor · #3027 ·
Re: R + jX ?
Hi Steve, Others have asked for this as well. And I think as far as I know, the short answer is NO. Unless there is a plan to update the firmware to do that calculation and provide a touch key to
By alan victor · #3026 ·
Re: R + jX ?
Did you try polar output?
By Erik Kaashoek · #3025 ·
Re: NanoVNA Saver
Bruce Have a look here https://zs1sci.com/blog/nanovnasaver/#Edit Cheers Al
By Algy McIntyre · #3024 ·
R + jX ?
I will apologize if this has already been covered. I didn't find it in a search. I see that, by default, NanoVNA reports R + L/C . Is there a way to change that to R +- X ? Yes, I know the PC software
By Steve N2IC · #3023 ·
Re: Firmware font size - 2 versus 4 trace
I have seen a technique where the font is "enlarged" simply by outputting each scan of the character font twice. This makes the character appear taller. It can make the text surprisingly more legible
By Joe St. Clair AF5MH · #3022 ·
Re: Firmware font size - 2 versus 4 trace
There are two flash parts, one 96k and one 32k Assuming the 32k flash holds the data store (did not analyze yet), the 96kByte flash has maybe 1kByte left. (code + initialized data is in total 97440
By Erik Kaashoek · #3021 ·
Trying to understand the T-Check outcome of the nanoVNA
Using a not too good BNC Tee I performed a T-Check Attached the measurement (.s2p) and the excel file (.xlsx) in which the T-Check is calculated. Next to the T-Check calculation the excel also
By Erik Kaashoek · #3020 ·
Re: Firmware font size - 2 versus 4 trace
Erik, Thanks for confirming memory capacity is a factor in the font sizes. My progressive bifocals work fine with the smaller fonts, but I imagine it's just a matter of time before someone releases a
By Bruce KX4AZ · #3019 ·
Re: Saver with Win7
Thanks Alan! See, I didn't even figure out it was an S21 measurement :D -- Rune / 5Q5R
By Rune Broberg · #3018 ·
Re: Saver with Win7
Hi Rune, The group delay (GD) is obtained from the transmission phase, S21. The negated value of phase shift calculated as the small change in phase shift occurring with a small change in frequency.
By alan victor · #3017 ·
Re: Saver with Win7
Thanks for the suggestion, Bryan. It sounds interesting. Do you know if/how group delay is determined from S-parameters? I'm not really an RF engineer, so I have had to figure out all these things
By Rune Broberg · #3016 ·
Re: Saver with Win7
peter_pc2a I am running nanovna-saver.v0.0.11 on Win 7 - 64 bit and it is working great. The software is very useful and seems to be quite stable. Rune: I know you are quite busy. Here is a
By Bryan, WA5VAH · #3015 ·
Re: Saver with Win7
Using Thunderbird, and perhaps other email clients, you should see the poster's full email address on the "From" line at the top of the email header. For instance, when I look at your email (to which
By Dave Daniel · #3014 ·
Re: Saver with Win7
Hi Bruce, I'm not certain quite how it works via groups.io, but I did attempt to put my email (mihtjel@...) in the body of the email I sent earlier, in order that Peter (and others) could
By Rune Broberg · #3013 ·
Re: Saver with Win7
A bit off topic, perhaps, but tell me, how do I expand an email address like mihtjel@... ? I keep seeing all the time but it doesn't work with my email client (Thunderbird). Bruce, K4TQL
By BruceN · #3012 ·
Re: Firmware font size - 2 versus 4 trace
Indeed, larger fonts need more memory. Prefer to spend memory on more useful features. Suggest to buy small reading glasses. I did..... Hugen does not have the large font size version on github (I can
By Erik Kaashoek · #3011 ·
Re: Firmware font size - 2 versus 4 trace
Erik, Is there enough firmware space on the uP for one more firmware on-screen option to display either 2 larger or 4 smaller traces? I think that would be a nice option to have. I know Hugen's
By Larry Rothman · #3010 ·