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how to use TDR in the firmware of the nanovna?


 

hi
I have tried : menu transform on
entered the velocity of coax 0.66

the lenght is about 16feet
and tested the other menu: low pas impulse etc

but I don't see the lenght of the coaxial cable

I am able with nanovna saver to see the coaxial cable lenght but not with only the nanovna
any help?
thank you
Gilles


 

Not sure but maybe you have to select for the trace "real"


 

that's right, I have found on reading nanovna manual chinese version translated to english.

thank you


 

I will suggest edy555 to do this automatic as after the domain transform the other display formats no longer make sense


 

ve2kwg,
Hiroh Satoh's (user "ch045") has written an informal user guide for the NanoVNA in Japanese. Attached is the Google translation of the "Time Domain Operations" section. For cable measurements, enable TDR by using low-pass mode in the time domain. I'm waiting to receive my second nanoVNA before loading the TDR firmware MOD so I haven't actually tried this yet.


 

I had suggested this in a post from 2 weeks ago - to grey-out/disable the other on-screen buttons when the transform function is used.
I think I'll have to enter it as an issue on git.

On Thu, Sep 26, 2019 at 04:44 AM, <erik@...> wrote:


I will suggest edy555 to do this automatic as after the domain transform the
other display formats no longer make sense


 

Where can we find the rest of this manual. Appears easy to read.

Bruce, K4TQL


 

On Thu, Sep 26, 2019 at 07:32 AM, BruceN wrote:


Where can we find the rest of this manual. Appears easy to read.

Bruce, K4TQL


 

Bruce,
I added the full Goggle translated user guide (NanoVNA_manual _ch045) to the "Files" section of this group. Again, full credit and appreciation go to Hiroh Satoh's (user "ch045").


 

this is exactly the document that I had read, thank you