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Broken S-A-A v2 ?
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Hello. Got my hand on this nanovna v2 plus(?)
Frist time turned it on got ALOT of traces and no idea what to do. After some tutorials I realased that it might be broken / bricked. As you can see from the pictures the traces go all over the place and resistances etc change all the time. I've calibrated the thing many many times, changed frequency range and calibrated again, calibrated more, tested antennas.... nothing Seems like there is no connection between board and sma connector. I can connect to nanovna-qt and saver. all show same kind of traces. Done calibration through software and through the screen. I have updated the firmware to the lastest one. Also tried the experimental. Still same. Any ideas? |
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Did you do a reset before each cal?
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Dave - W?LEV On Tue, Sep 14, 2021 at 10:16 PM <jorksx@...> wrote:
Hello. Got my hand on this nanovna v2 plus(?) --
*Dave - W?LEV* *Just Let Darwin Work* |
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Not sure what frequency you are measuring but first do a reset all. In menu buttons.
Set the stimulus 1 MHz to 10 MHz? just for some low hf range. On the s-a-a-2 my SAA2 port zero is the bottom connection not the top left. Do a reset then Do a SOL calibration. If you get the same results all over the place. Go to the transform turn it on and off. Observe the display on the Smith chart. See if you can see something other than garbage. It not then probably the sma connection is broken of the PC board. De K8HTB Joe |
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I would also agree on checking connections. when i ever have not a tight connection to whatever I am testing I get that birds nest mess of lines also.
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Joe WB9SBD On 9/14/2021 6:13 PM, K8HTB wrote:
Not sure what frequency you are measuring but first do a reset all. In menu buttons. |
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It looks like the calibration parts and or a cable or 2 might be defective.?
This has tripped-up users in the past with the same display output.? Check all your call components.? On Tue., 14 Sep. 2021 at 6:16 p.m., jorksx@...<jorksx@...> wrote: Hello. Got my hand on this nanovna v2 plus(?) Frist time turned it on got ALOT of traces and no idea what to do. After some tutorials I realased that it might be broken / bricked. As you can see from the pictures the traces go all over the place and resistances etc change all the time. I've calibrated the thing many many times, changed frequency range and calibrated again, calibrated more, tested antennas.... nothing Seems like there is no connection between board and sma connector. I can connect to nanovna-qt and saver. all show same kind of traces. Done calibration through software and through the screen. I have updated the firmware to the lastest one. Also tried the experimental. Still same. Any ideas? |
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Config - Version says NanoVNA v2 Plus.
I just tested ALL the firmwares listed on that site I linked. 2 of them did not work at all, 2 were super slow and rest were working but still with my problem. frequency range is 100mhz-150mhz. Tried many different of them. What should the scale/ and div etc... values be? Seems when I play with them I get better looking traces but the resistance values for example still changed all the time. SOmetimes -6ohm to 20ohm. sometimes its 48ohm - 51ohm |
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Config-version only displays the version of FW you installed into the device.
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If you installed plus FW into a non-plus device, you will see 'plus' on the version screen. So - you need to install the non-plus FW into your device and calibrate to see if the problem goes away - if it does, you have a non-plus device. On Wednesday, September 15, 2021, 06:25:05 a.m. EDT, <jorksx@...> wrote:
Config - Version says NanoVNA v2 Plus. I just tested ALL the firmwares listed on that site I linked. 2 of them did not work at all, 2 were super slow and rest were working but still with my problem. frequency range is 100mhz-150mhz. Tried many different of them. What should the scale/ and div etc... values be? Seems when I play with them I get better looking traces but the resistance values for example still changed all the time. SOmetimes -6ohm to 20ohm. sometimes its 48ohm - 51ohm |
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not sure how quoting works here but @Larry Rothman
From the link above. I installed the v2.2 firmware. The one that is not sold anymore. Problem is still the same Then I installed one above it (v2 plus v2.3) Tried both experimental and stable. problem is still the same Tried the V2 plus4 and the firmware does not work and have to force dfu and reflash something else... Also tried all the "unoffical hardware variants" |
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What is a "warm" wire in the CH0 connector??
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On 9/19/2021 11:32 AM, eugen.trifu@... wrote:
I had the same problem, which appears when making the calibration and SHORT probe does no electric contact is made with the CH0 connector. |
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William Smith
I'd imagine 'not the shield', aka the ('hot'?) center conductor.
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73, Willie N1JBJ On Sep 19, 2021, at 1:44 PM, Mike C. <mg@...> wrote: |
Mike C.
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