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Hello, Use config-save after enable it Clyde KC7BJE

This is pretty standard FMCW - the frequency of the beat note from the mixer is proportional to the delay. substantially more information can be extracted from this beat frequency as compared to TDR

Oh, now I understand. Your H4 does indeed save the scale and applies it properly. What it doesn't save and restore is the grid labels (i.e. from the "show grid values" checkbox). Apparently the "show

Stan, here is what happens when I create the swr profile, take a reading, power down then power back up. I have also included a shot of my version. 73, Bob, KN4HH

I should add that I am mainly interested in FMCW FDR (electrically, essentially the same thing as chirp sonar/radar). A typical implementation of this scheme involves a ramp generator and VCO driving

Bob, I also use an H4, and can readily save a power-up "profile" with whichever swr scale I choose. I currently set the swr trace scale to 0.25 (shows on the display as 250m), and then select the

I have a NanoVNA-H4. I followed the H4 video for creating a swr measurement profile (my term). After completion of the steps, I successfully did a swr sweep of a uhf antenna. I shut down the unit and

Attached is a photo of one I made for doing S21 measurements. It is made using one of the sections of the NanoVNA RF Test Boards that you can find on eBay, Amazon and AliExpress. Works OK for testing

How is FDR different than FFT of S11 to generate time domain? The FFT approach does tell you about all the little lumps and bumps (as does classic TDR).

Frequency-domain reflectometry (FDR) has a number of advantages over time-domain reflectometry (TDR), including enabling the detection of many more types of damage to coax than just open/short

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I read on @Twitter last night there was a new TinySA with a range just past 5GHz, covering some Wi-Fi, and a 4 inch display for $140.

With great difficulty I finally found what could be s21_series_impedance s21_shunt_through_impedance Can you explain to me what is the point of going through that, since in any case the basic data is

Yup - I've used both the DFU utility and an STLink2 dongle to flash my Nano with firmware without any issues. I also pushed the TinySA F/W to the Nano to play with the GUI as the TinySA design re-used

OK, OK... Would that be "Mega Mills" or "Milli Mills"???

Hi Roger, I have just quickly tried 5.5 but I got exactly the same results. The following messages were displayed in another window. These were the same for 5.4 NanoVNASaver 0.5.4 Copyright (C) 2019,

Don't you mean a mill - a tenth of a cent? Mike N2MS

milli...mega...who's counting... New lottery "Milli Millions"! Think of what you could do with millis!

We have no allocation in the milliHertz region (mHz)! That's the land of earthquakes and the like. If you meant amateur radio HF allocation, that would be in the MegaHertz region (MHz). Dave - W?LEV

Transformers are tricky. The voltage ratio between input and output is roughly the turns ratio, but that's not actually gain/loss, since the power through the transformer is what's constant. A 2:1