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Sorry, then i port code for H4 i fogot copy dsp.c file As result Bandwidth option not work :( (It measure many time, but use only last data) Now all correct, also i speedup SPI bus, display update

From a course in EMC / RFI I once taught (assuming ideal components): [image: image.png] [image: image.png] *RESISTANCE* *REACTANCE* Frequency independent Frequency dependent (Sits on the real

On Mon, Mar 30, 2020 at 11:34 AM, DiSlord wrote: Fix screensot (shold be) Set minimum freq as 10kHz Remove DFU menu ==================================================================== See attached

You can learn a whole bunch and pretty much teach yourself by playing with SimSmith. I use it extensively. It's free and can be accessed at the following URL. It also offers some excellent tutorials,

Its option Bandwidth, you can use generator and send AM modulated signal to CH1 port and see signal spectre. Use Bandwidth and see better and better bandwidth filter of signal See

Paul, The groups.io website mangled my python session rather badly. Here it is in a somewhat more readable form: ####################### def Gamma(Zload, Zo): return((Zload - Zo)/(Zload + Zo))

I try 12kHz offset (in my last commits i add dynamic update dsp sin/cos table on offset change, work only on 1kHz step) i don`t see diffrences, but possible i mistake Also i try speedup audio codec

https://drive.google.com/file/d/17rDr6OAe4zNp04xAkDpb4-7lWKix3t0C/view?usp=sharing Fix screensot (shold be) Set minimum freq as 10kHz Remove DFU menu

Paul, I got it that you had some familiarity with Smith Charts, and were just stumped on why the tutorial was incomplete in identifying the frequencies involved. I wrote the explanation such that

Oh it's clickable, it takes me to a Google doc. This is a screenshot of the doc!

I'm hoping to have access to a more expensive VNA later this week for comparisons but for now, the nanoVNA-H looks very promising in terms of accuracy near the top of its frequency range:

Not sure why it's not click-able...probably needs the http:// prefix. -- John AE5X https://ae5x.blogspot.com/

Edy555 also has been experimenting with an IF of 12kHz as this frequency enables a reduction of DSP processing power required. Not sure if the experiment came to a conclusion. -- NanoVNA Wiki:

On Mon, Mar 30, 2020 at 08:41 AM, Nbridgema wrote: After installing ttrftech/NanoVNA version 0.7.1, F_min is again 50 KHz and F_ max is 2.7 GHz, although noisy > 1.5 GHz. Confirm?

There are several dozen videos on Larry Benko’s website showing Smith chart basics AND exploring various RF topics. A good start might be https://m.youtube.com/watch?v=79jbor_T9PU When I was first

On Mon, Mar 30, 2020 at 07:39 AM, Jos Stevens wrote: ...works normally under NanoVNASaver. ? ... The extra bandwith settings seem to work when standalone ... I see that the smaller the bandwith, the

Jerry, thanks; it was enough to point out that I really hadn't missed some piece of information. I understand what you pointed out although I hadn't followed it through as thoroughly as you. You were

Well John, I'm sure that you love me but what the heck is up with that link?

After installing ttrftech/NanoVNA version 0.7.1, F_min is again 50 KHz and F_ max is 2.7 GHz, although noisy > 1.5 GHz. Confirm? -- I_B_Nbridgema

I ordered mine from this Amazon vendor: shorturl.at/ahsS7 Order placed on Saturday, Amazon said it would arrive Monday (today) but it was delivered at noon yesterday, 20 hours after placing the order.