Thanks for all these videos. I have ordered one. I already have a Sark 110 but it is so complicated....... the nanoVNA does more than my simpler YouKits FG-01 also. I see where is can assist me in even arranging my counterpoise for my portable verticals.
Thank you for this very informative video! 😉 I want to ask if is possible to use this VNA as a signal generator? Something like the Mini600. Thanks! Paul.
@@OM0ET It is used for S21 measurements. to sweep filters and such. like a tracking generator but it is software filtered to remove harmonics. you can used it externally just be aware it will not be a sine wave.
If I understand how the VNA works, I should be able to connect a 50 ohm bandpass filter between ch0 and ch1 and be able to see what frequencies the filter is passing? Sounds like a good tool to tune the filter then.
@@IMSAIGuy Which trace is it that shows you what comes through the filter? You just say choose this trace and go on never listing what each trace actually is
Using my nanovna The high I tuned to -45.120 and the low tuned to -36db being that I am using hand held nanovna and being the best I can get Is this good using the fumei 50watt duplexer??
Now my other fumei duplexer 50watt I have it using the nanovna reads -56db on low and high is -54 db That's where the notches are.. Would these be safe for the Motorola sm50 radius repeater?? All I have is the nanovna.
I'm not sure about phase. Is phase the difference between input and output. Would the basis be one wavelength. Would one wavelength be 360 degrees or 2pi degrees and the phase angle would be a part of the wavelength? BTY, thank you for your video.
yes 360 degrees is one wavelength. The phase angle that the nano measures is complicated. a vna measures the phase of the reflected wave and calibration sets this to 0 degrees. any change due to electrical properties show as a phase delta. I could spend a day explaining. think of it as an echo. if you add a length of coax the echo will come back later
Great videos! And I really like the information! But you say UMMM a little too much, it is very distracting. Otherwise, thank you very much for making these videos and information!
@@IMSAIGuy I was thinking it was a Chebyshev type I, with 0.01 dB ripple in the passband region, but forgot about the lumpy response in the stopband region. You not only confirmed, but even clarified. Thanks! Furthermore, a type I filter would never be lumpy in the stopband, no matter the ripple, so my judgement was wrong.
At 1:51 you wave the pointer around the screen and say "we can turn this trace off" - which one? - I think a that point the trace you refer to is already turned off and not displayed. At 2:01 you say "the other traces are going to be channel 1 and these are channel 0 traces" but you are waving the pointer over at least three of the items in the menu listing, and then "this is channel 1 trace" but the screen has changed to no longer display the menu items. Frankly, I found this part of the video to very vague.
It is confusing and it was new to me too. I eventually figured out that trace 0 (yellow) and trace 2 (green) are for CH0 (channel 0 for S11). Trace 1 (blue) and trace 3 (purple) are for CH1 (channel 1 for S12). so to use for filters you need to use trace 1 or 3. then turn on LOGMAG or LINEAR for the S12 data.
@@IMSAIGuy Thanks, that all makes sense now. It was just frustrating to watch that segment of your video about 10 times to try and work out what was being referred to and which traces were what. Again, thanks.
The Nanovna menu system becomes too complex as applications are added. I say dump the screen and menu and connect the system to a chromebook via USB. I am not paying rf engineers to duplicate the PC industry.
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Thanks for this very comprehensive explanation .. now i understand the Smith chart!!
Thanks for all these videos. I have ordered one. I already have a Sark 110 but it is so complicated....... the nanoVNA does more than my simpler YouKits FG-01 also. I see where is can assist me in even arranging my counterpoise for my portable verticals.
I have this gadget today from amazon... this will be helpful to learn a lot about antennas,, especially DIY ham radio antennas... awesome
Thank you for this very informative video! 😉 I want to ask if is possible to use this VNA as a signal generator? Something like the Mini600. Thanks! Paul.
I don't think it will output very clean signals. It will be useable from 0 to 300mhz but it will contain harmonics. more of a square wave generator
@@IMSAIGuy Oh I understand, but does it have this feature in the menu please?
@@OM0ET It is used for S21 measurements. to sweep filters and such. like a tracking generator but it is software filtered to remove harmonics. you can used it externally just be aware it will not be a sine wave.
@@IMSAIGuy Great! Thank you for your quick replay! ;-) Have a nice day! 73, Paul
If I understand how the VNA works, I should be able to connect a 50 ohm bandpass filter between ch0 and ch1 and be able to see what frequencies the filter is passing? Sounds like a good tool to tune the filter then.
yes, please watch my video on filters
ruclips.net/video/f-qJIjaFIrs/видео.html
@@IMSAIGuy Which trace is it that shows you what comes through the filter? You just say choose this trace and go on never listing what each trace actually is
Using my nanovna
The high I tuned to -45.120 and the low tuned to -36db being that I am using hand held nanovna and being the best I can get
Is this good using the fumei 50watt duplexer??
my nanovna is truly two i have never see 4 channel may be firmware differents
mine too is two channels may be other are different
Can you tune a band pass notch duplexer and or just test it with this vna? Thanks
tune
Now my other fumei duplexer 50watt I have it using the nanovna reads -56db on low and high is -54 db
That's where the notches are..
Would these be safe for the Motorola sm50 radius repeater?? All I have is the nanovna.
ruclips.net/video/TbEK4v_3Xuo/видео.html
Could you use this as a cheap way to tune a duplexer?
yes
I'm not sure about phase. Is phase the difference between input and output. Would the basis be one wavelength. Would one wavelength be 360 degrees or 2pi degrees and the phase angle would be a part of the wavelength? BTY, thank you for your video.
yes 360 degrees is one wavelength. The phase angle that the nano measures is complicated. a vna measures the phase of the reflected wave and calibration sets this to 0 degrees. any change due to electrical properties show as a phase delta. I could spend a day explaining. think of it as an echo. if you add a length of coax the echo will come back later
@@IMSAIGuy That's pretty clear. Thanks again.
Hi. Can I use a NanoVNA to measure transients of motor coil? I mean something like a bad isolation of a coil. Thanks
no
Great videos! And I really like the information! But you say UMMM a little too much, it is very distracting. Otherwise, thank you very much for making these videos and information!
I would guess that the LPF is a Chebyshev. Could you kindly confirm, if you please?
I would guess (since the pass band is flat and the rejection band is lumpy) it is a Chebyshev type 2
@@IMSAIGuy I was thinking it was a Chebyshev type I, with 0.01 dB ripple in the passband region, but forgot about the lumpy response in the stopband region. You not only confirmed, but even clarified. Thanks!
Furthermore, a type I filter would never be lumpy in the stopband, no matter the ripple, so my judgement was wrong.
Since you're measuring a device connected to a cable should the VNA be calibrated with the cable connected before testing?
yes, but for some measurements you will find it doesn't matter much. for others it makes a big difference.
@@IMSAIGuy Thank you for the quick reply and the informative vids. I suppose at hf freqs would not matter much if at all with short (1 foot) cables.
At 1:51 you wave the pointer around the screen and say "we can turn this trace off" - which one? - I think a that point the trace you refer to is already turned off and not displayed.
At 2:01 you say "the other traces are going to be channel 1 and these are channel 0 traces" but you are waving the pointer over at least three of the items in the menu listing, and then "this is channel 1 trace" but the screen has changed to no longer display the menu items.
Frankly, I found this part of the video to very vague.
It is confusing and it was new to me too. I eventually figured out that trace 0 (yellow) and trace 2 (green) are for CH0 (channel 0 for S11). Trace 1 (blue) and trace 3 (purple) are for CH1 (channel 1 for S12). so to use for filters you need to use trace 1 or 3. then turn on LOGMAG or LINEAR for the S12 data.
@@IMSAIGuy Thanks, that all makes sense now. It was just frustrating to watch that segment of your video about 10 times to try and work out what was being referred to and which traces were what. Again, thanks.
@@IMSAIGuy Where do you find the logmag or linear menu items?
@@jensaltwaterhaven It's in the documentation
drive.google.com/drive/folders/1BAyFODUrqiFfg7MQbVb6BB5sWTR6EAcy
You can configure any trace to be for any channel you want, I know this thread is a year old, just in case you didn't know, it happened to me too.
The Nanovna menu system becomes too complex as applications are added. I say dump the screen and menu and connect the system to a chromebook via USB. I am not paying rf engineers to duplicate the PC industry.
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sorry, youtube changed the defaults and i'm trying to disable mid roll ads
Umm uhhh duuhhh whaaa learn how to do it yourself BEFORE making the video!
I would agree